Changes between Version 2 and Version 3 of sbcrevisions


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Timestamp:
12/20/2017 11:44:31 PM (8 years ago)
Author:
Tim Harvey
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  • sbcrevisions

    v2 v3  
    1 {{{#!html       
    2           <div id="wikipage" class="trac-content"><h1 id="GateworksSingleBoardComputersRevisions">Gateworks Single Board Computers Revisions</h1>
    3 <p>
    4 </p><div class="wiki-toc">
    5 <ol>
    6   <li>
    7     <a href="#GateworksSingleBoardComputersRevisions">Gateworks Single Board Computers Revisions</a>
    8   </li>
    9   <li>
    10     <a href="#VentanaFamily">Ventana Family</a>
    11     <ol>
    12       <li>
    13         <a href="#GW51xx">GW51xx</a>
    14         <ol>
    15           <li>
    16             <a href="#RevisionA">Revision A</a>
    17           </li>
    18           <li>
    19             <a href="#RevisionB">Revision B</a>
    20           </li>
    21           <li>
    22             <a href="#RevisionB.1">Revision B.1</a>
    23           </li>
    24           <li>
    25             <a href="#RevisionC">Revision C</a>
    26           </li>
    27           <li>
    28             <a href="#RevisionD">Revision D</a>
    29           </li>
    30           <li>
    31             <a href="#RevisionE.1">Revision E.1</a>
    32           </li>
    33           <li>
    34             <a href="#RevisionF">Revision F</a>
    35           </li>
    36         </ol>
    37       </li>
    38       <li>
    39         <a href="#GW520x">GW520x</a>
    40         <ol>
    41           <li>
    42             <a href="#RevisionA1">Revision A</a>
    43           </li>
    44           <li>
    45             <a href="#RevisionA.1">Revision A.1</a>
    46           </li>
    47           <li>
    48             <a href="#RevisionB.11">Revision B.1</a>
    49           </li>
    50           <li>
    51             <a href="#RevisionC.1">Revision C.1</a>
    52           </li>
    53           <li>
    54             <a href="#RevisionC.2">Revision C.2</a>
    55           </li>
    56           <li>
    57             <a href="#RevisionD1">Revision D</a>
    58           </li>
    59         </ol>
    60       </li>
    61       <li>
    62         <a href="#GW522x">GW522x</a>
    63         <ol>
    64           <li>
    65             <a href="#RevisionA2">Revision A</a>
    66           </li>
    67           <li>
    68             <a href="#RevisionA.11">Revision A.1</a>
    69           </li>
    70           <li>
    71             <a href="#RevisionB1">Revision B</a>
    72           </li>
    73           <li>
    74             <a href="#RevisionC1">Revision C</a>
    75           </li>
    76           <li>
    77             <a href="#RevisionD2">Revision D</a>
    78           </li>
    79           <li>
    80             <a href="#RevisionD.1">Revision D.1</a>
    81           </li>
    82         </ol>
    83       </li>
    84       <li>
    85         <a href="#GW53xx">GW53xx</a>
    86         <ol>
    87           <li>
    88             <a href="#RevisionA3">Revision A</a>
    89           </li>
    90           <li>
    91             <a href="#RevisionA.12">Revision A.1</a>
    92           </li>
    93           <li>
    94             <a href="#RevisionB2">Revision B</a>
    95           </li>
    96           <li>
    97             <a href="#RevisionC2">Revision C</a>
    98           </li>
    99           <li>
    100             <a href="#RevisionD3">Revision D</a>
    101           </li>
    102           <li>
    103             <a href="#RevisionE">Revision E</a>
    104           </li>
    105           <li>
    106             <a href="#RevisionF1">Revision F</a>
    107           </li>
    108         </ol>
    109       </li>
    110       <li>
    111         <a href="#GW54xx">GW54xx</a>
    112         <ol>
    113           <li>
    114             <a href="#RevisionB3">Revision B</a>
    115           </li>
    116           <li>
    117             <a href="#RevisionC3">Revision C</a>
    118           </li>
    119           <li>
    120             <a href="#RevisionD4">Revision D</a>
    121           </li>
    122           <li>
    123             <a href="#RevisionE1">Revision E</a>
    124           </li>
    125           <li>
    126             <a href="#RevisionE.11">Revision E.1</a>
    127           </li>
    128           <li>
    129             <a href="#RevisionF2">Revision F</a>
    130           </li>
    131         </ol>
    132       </li>
    133       <li>
    134         <a href="#GW551x">GW551x</a>
    135         <ol>
    136           <li>
    137             <a href="#RevisionA.13">Revision A.1</a>
    138           </li>
    139           <li>
    140             <a href="#RevisionB4">Revision B</a>
    141           </li>
    142           <li>
    143             <a href="#RevisionC4">Revision C</a>
    144           </li>
    145           <li>
    146             <a href="#RevisionC.11">Revision C.1</a>
    147           </li>
    148           <li>
    149             <a href="#RevisionD5">Revision D</a>
    150           </li>
    151         </ol>
    152       </li>
    153       <li>
    154         <a href="#GW552x">GW552x</a>
    155         <ol>
    156           <li>
    157             <a href="#RevisionA.2">Revision A.2</a>
    158           </li>
    159           <li>
    160             <a href="#RevisionB5">Revision B</a>
    161           </li>
    162           <li>
    163             <a href="#RevisionC5">Revision C</a>
    164           </li>
    165           <li>
    166             <a href="#RevisionC.12">Revision C.1</a>
    167           </li>
    168         </ol>
    169       </li>
    170       <li>
    171         <a href="#GW553x">GW553x</a>
    172         <ol>
    173           <li>
    174             <a href="#RevisionB6">Revision B</a>
    175           </li>
    176         </ol>
    177       </li>
    178     </ol>
    179   </li>
    180   <li>
    181     <a href="#LagunaFamily">Laguna Family</a>
    182     <ol>
    183       <li>
    184         <a href="#GW2388">GW2388</a>
    185       </li>
    186     </ol>
    187   </li>
    188   <li>
    189     <a href="#OtherSBCFamilies">Other SBC Families</a>
    190   </li>
    191 </ol>
    192 </div><p>
    193 </p>
    194 <p>
     1[[PageOutline]]
     2
     3= Gateworks Single Board Computers Revisions =
    1954This page is to describe the difference between hardware revisions.
    196 </p>
    197 <h1 id="VentanaFamily">Ventana Family</h1>
    198 <h2 id="GW51xx">GW51xx</h2>
    199 <h3 id="RevisionA">Revision A</h3>
    200 <p>
     5
     6[=#ventana]
     7= Ventana Family =
     8
     9[=#gw51xx]
     10== GW51xx ==
     11
     12=== Revision A ===
    20113Date: 04/19/2013
    202 </p>
    203 <ul><li>Initial release
    204 </li></ul><h3 id="RevisionB">Revision B</h3>
    205 <p>
     14 * Initial release
     15
     16=== Revision B ===
    20617Date: 09/17/2013
    207 </p>
    208 <ul><li>Add VDD_HIGH to GSC analog input for voltage monitoring
    209 </li><li>Select GPS 4800 baud NMEA protocol by default
    210 </li><li>Reduce voltage drop for USB OTG VBUS
    211 </li><li>Adjust 5V boost converter feedback resistors for more accurate 5V
    212 </li><li>Add i.MX6 GPIO control of mini-PCIe <a class="missing wiki">WiFi?</a> disable
    213 </li><li>Move mounting holes to match other Ventana boards
    214 </li><li>Improve HDMI and OTG connectors footprints
    215 </li><li>Modify JTAG route from a star to a daisy chain topology
    216 </li></ul><h3 id="RevisionB.1">Revision B.1</h3>
    217 <p>
     18 * Add VDD_HIGH to GSC analog input for voltage monitoring
     19 * Select GPS 4800 baud NMEA protocol by default
     20 * Reduce voltage drop for USB OTG VBUS
     21 * Adjust 5V boost converter feedback resistors for more accurate 5V
     22 * Add i.MX6 GPIO control of mini-PCIe WiFi? disable
     23 * Move mounting holes to match other Ventana boards
     24 * Improve HDMI and OTG connectors footprints
     25 * Modify JTAG route from a star to a daisy chain topology
     26
     27=== Revision B.1 ===
    21828Date: 11/08/2013
    219 </p>
    220 <ul><li>Eliminate possible high input voltage on the switching supply enable input by removing unnecessary R34 pullup
    221 </li></ul><h3 id="RevisionC">Revision C</h3>
    222 <p>
     29 * Eliminate possible high input voltage on the switching supply enable input by removing unnecessary R34 pullup
     30
     31=== Revision C ===
    22332Date: 09/04/2014
    224 </p>
    225 <ul><li>Add diode to prevent power backfeed when board is powered off and a USB cable is plugged in to a powered host (see <a class="wiki" href="/wiki/ventana/errata#hw8">Errata HW8</a>)
    226 </li><li>Connect GPS PPS signal to reserved pin 49 on Mini-PCIe socket through unloaded configuration resistor
    227 </li><li>Change GSC VDD_HIGH connection to include a divide-by-two resistive divider since voltage exceeds analog-to-digital converter 2.5V reference
    228 </li><li>Add GSC analog input option to DIO
    229 </li><li>Replace U15 input power supply to increase operating voltage range and improved manufacturability
    230 </li><li>Ground RTC XTAL input to eliminate noise causing pre-mature watchdog resets (see <a class="wiki" href="/wiki/ventana/errata#hw7">Errata HW7</a>)
    231 </li></ul><p>
    232  
    233 </p>
    234 <h3 id="RevisionD">Revision D</h3>
    235 <p>
     33 * Add diode to prevent power backfeed when board is powered off and a USB cable is plugged in to a powered host (see [wiki:ventana/errata#hw8 Errata HW8])
     34 * Connect GPS PPS signal to reserved pin 49 on Mini-PCIe socket through unloaded configuration resistor
     35 * Change GSC VDD_HIGH connection to include a divide-by-two resistive divider since voltage exceeds analog-to-digital converter 2.5V reference
     36 * Add GSC analog input option to DIO
     37 * Replace U15 input power supply to increase operating voltage range and improved manufacturability
     38 * Ground RTC XTAL input to eliminate noise causing pre-mature watchdog resets (see [wiki:ventana/errata#hw7 Errata HW7])
     39
     40=== Revision D ===
    23641Date: 03/05/2015
    237 </p>
    238 <ul><li>Add optional 3.3V primary power supply bypass connector to power the board with well regulated 3.3V +/-5% input
    239 </li><li>Move watchdog timer from WDOG2_B to WDOG1_B for mainstream Linux support
    240 </li><li>Add 32.768KHz crystal to processor real time clock for increased watchdog timer and Linux time of day accuracy
    241 </li><li>Reduce PORJ pullup resistor value for faster rise time
    242 </li><li>Improve inductor footprints for improved manufacturability
    243 </li></ul><h3 id="RevisionE.1">Revision E.1</h3>
    244 <p>
     42 * Add optional 3.3V primary power supply bypass connector to power the board with well regulated 3.3V +/-5% input
     43 * Move watchdog timer from WDOG2_B to WDOG1_B for mainstream Linux support
     44 * Add 32.768KHz crystal to processor real time clock for increased watchdog timer and Linux time of day accuracy
     45 * Reduce PORJ pullup resistor value for faster rise time Improve inductor footprints for improved manufacturability
     46
     47=== Revision E.1 ===
    24548Date: 12/23/2015
    246 </p>
    247 <ul><li>Add series resistor between battery positive and reverse current diode for UL two level protection
    248 </li><li>Reduce PCIe clock jitter to GEN2 levels by adding a clock generator providing the CPU and PCIe socket clock input (see <a class="wiki" href="/wiki/ventana/errata#hw14">Errata HW14</a>)
    249 </li><li>Add processor external watchdog support by connecting WDOG_B to PMIC PWRON input
    250 </li></ul><h3 id="RevisionF">Revision F</h3>
    251 <p>
     49 * Add series resistor between battery positive and reverse current diode for UL two level protection
     50 * Reduce PCIe clock jitter to GEN2 levels by adding a clock generator providing the CPU and PCIe socket clock input (see [wiki:ventana/errata#hw14 Errata HW14])
     51 * Add processor external watchdog support by connecting WDOG_B to PMIC PWRON input
     52
     53=== Revision F ===
    25254Date: 10/17/2016:
    253 </p>
    254 <ul><li>Reduce emissions / EMI on RGMII clock signal with 22 ohm series resistor
    255 </li><li>Replaced GbE crystal for increased lifespan
    256 </li></ul><h2 id="GW520x">GW520x</h2>
    257 <h3 id="RevisionA1">Revision A</h3>
    258 <p>
     55 * Reduce emissions / EMI on RGMII clock signal with 22 ohm series resistor
     56 * Replaced GbE crystal for increased lifespan
     57
     58
     59[=#gw520x]
     60== GW520x ==
     61
     62=== Revision A ===
    25963Date: 10/18/2013
    260 </p>
    261 <ul><li>Initial Release
    262 </li></ul><h3 id="RevisionA.1">Revision A.1</h3>
    263 <p>
     64 * Initial Release
     65
     66=== Revision A.1 ===
    26467Date: 10/18/2013
    265 </p>
    266 <ul><li>Replace decoupling capacitors on the clock buffer input with series resistors for improved PCIe clock performance.
    267 </li></ul><h3 id="RevisionB.11">Revision B.1</h3>
    268 <p>
     68 * Replace decoupling capacitors on the clock buffer input with series resistors for improved PCIe clock performance.
     69
     70=== Revision B.1 ===
    26971Date: 1/30/2014
    270 </p>
    271 <ul><li>Add WiFi disable signal to all Mini-PCIe sockets through zero ohm resistors
    272 </li><li>Add optional load JST 1x2x2mm connector under the pushbutton switch
    273 </li><li>Add ability to route USB OTG to miniPCIe socket instead of front-panel via GPIO
    274 </li><li>Replace 2-pin tamper switch connector with 3-pin connector to support CAN Bus, RS485, TTL serial and tamper switch option
    275 </li><li>Add optional CAN Bus transceiver
    276 </li><li>Add optional RS485 transceiver
    277 </li><li>Add optional TTL serial bypass resistors
    278 </li><li>Add option for 3.3V and 5V power to one pin of the digital I/O connector through unloaded configuration resistors
    279 </li></ul><h3 id="RevisionC.1">Revision C.1</h3>
    280 <p>
     72 * Add WiFi disable signal to all Mini-PCIe sockets through zero ohm resistors
     73 * Add optional load JST 1x2x2mm connector under the pushbutton switch
     74 * Add ability to route USB OTG to miniPCIe socket instead of front-panel via GPIO
     75 * Replace 2-pin tamper switch connector with 3-pin connector to support CAN Bus, RS485, TTL serial and tamper switch option
     76 * Add optional CAN Bus transceiver
     77 * Add optional RS485 transceiver
     78 * Add optional TTL serial bypass resistors
     79 * Add option for 3.3V and 5V power to one pin of the digital I/O connector through unloaded configuration resistors
     80
     81=== Revision C.1 ===
    28182Date: 3/31/2015
    282 </p>
    283 <ul><li>Replace obsolete J2 uSD/SIM socket with functionally equivalent socket
    284 </li><li>Replace 3.3V TVS arrays with 2.5V arrays for improved protection
    285 </li><li>Add 3.3V voltage translator to both 2.5V PCISKTx_RSTJ signals for increased voltage margin
    286 </li><li>Remove capacitor on tamper switch input to reduce switch debounce time constant
    287 </li><li>Add Schottky diode to USB_H1_VBUS net to prevent i.MX6 backfeed when board is powered off and active USB cable is plugged in
    288 </li><li>Connect I2C3 bus to the digital I/O connector through unloaded configuration resistors
    289 </li><li>Connect GPS PPS signal to reserved pin on both Mini-PCIe sockets through unloaded configuration resistors
    290 </li><li>Add changes to support SOM application, (a) add CAN bus transceiver bypass resistors, (b) add RS232 transceiver bypass resistors, (c) add connector under uSD/SIM socket to support SD, USB, battery voltage, and reset, (d) add 2-pin power input connector
    291 </li><li>Add "USB" to PCIe socket silkscreen for clarification
    292 </li></ul><h3 id="RevisionC.2">Revision C.2</h3>
    293 <p>
     83 * Replace obsolete J2 uSD/SIM socket with functionally equivalent socket
     84 * Replace 3.3V TVS arrays with 2.5V arrays for improved protection
     85 * Add 3.3V voltage translator to both 2.5V PCISKTx_RSTJ signals for increased voltage margin
     86 * Remove capacitor on tamper switch input to reduce switch debounce time constant
     87 * Add Schottky diode to USB_H1_VBUS net to prevent i.MX6 backfeed when board is powered off and active USB cable is plugged in
     88 * Connect I2C3 bus to the digital I/O connector through unloaded configuration resistors
     89 * Connect GPS PPS signal to reserved pin on both Mini-PCIe sockets through unloaded configuration resistors
     90 * Add changes to support SOM application, (a) add CAN bus transceiver bypass resistors, (b) add RS232 transceiver bypass resistors, (c) add connector under uSD/SIM socket to support SD, USB, battery voltage, and reset, (d) add 2-pin power input connector
     91 * Add "USB" to PCIe socket silkscreen for clarification
     92
     93=== Revision C.2 ===
    29494Date: 4/3/2015
    295 </p>
    296 <ul><li>Add 100 ohm differential PCIe clock termination resistor for improved PCIe clock compliance.
    297 </li></ul><h3 id="RevisionD1">Revision D</h3>
    298 <p>
     95 * Add 100 ohm differential PCIe clock termination resistor for improved PCIe clock compliance.
     96
     97=== Revision D ===
    29998Date: 2/18/2016
    300 </p>
    301 <ul><li>Move watchdog timer from WDOG2_B to WDOG1_B for mainstream Linux support
    302 </li><li>Add 32.768KHz crystal to processor real time clock for increased watchdog timer and Linux time of day accuracy
    303 </li><li>Replace audio codec logic ground connection with two zero ohm configuration resistors for connecting to analog ground by default audio connector J11.5 as an option
    304 </li><li>Add optional GSC analog input to J4.1 connector through divide by two configuration resistors unloading the series resistor for backwards compatibility
    305 </li><li>Add optional 4-pin friction latching connector for micro-B OTG connector
    306 </li><li>Add optional OTG ID pulldown resistor to configure OTG port for host operation when optional 4-pin connector is loaded
    307 </li><li>Reduce PORJ pullup resistor value for faster rise time
    308 </li><li>Add series resistor between battery positive and reverse current diode for UL two level protection
    309 </li><li>Add processor watchdog support by connecting WDOG_B to PMIC PWRON input
    310 </li><li>Add support for UHS-1 MMC cards to run at their full speed capability
    311 </li><li>Reduce PCIe clock jitter to GEN2 levels by replacing clock buffer with clock generator and connecting clock output back to processor PCIe clock input
    312 </li><li>Replace RGMII_TXCLK series resistor with 22.1 ohm device and add second 22.1 series resistor to RGMII_RXCLK to reduce radiated emissions
    313 </li><li>Improve processor core voltage rails by adding on 22uF capacitor to both VDD_ARM and VDD_SOC and widening copper fills
    314 </li><li>Update SIM/uSD socket footprint and move 0.2mm closer to board edge for improved manufacturing
    315 </li><li>Move USB signals away from SIM/uSD mounting tab slot to improve fabrication processes
    316 </li></ul><h2 id="GW522x">GW522x</h2>
    317 <h3 id="RevisionA2">Revision A</h3>
    318 <p>
     99 * Move watchdog timer from WDOG2_B to WDOG1_B for mainstream Linux support
     100 * Add 32.768KHz crystal to processor real time clock for increased watchdog timer and Linux time of day accuracy
     101 * Replace audio codec logic ground connection with two zero ohm configuration resistors for connecting to analog ground by default audio connector J11.5 as an option
     102 * Add optional GSC analog input to J4.1 connector through divide by two configuration resistors unloading the series resistor for backwards compatibility
     103 * Add optional 4-pin friction latching connector for micro-B OTG connector
     104 * Add optional OTG ID pulldown resistor to configure OTG port for host operation when optional 4-pin connector is loaded
     105 * Reduce PORJ pullup resistor value for faster rise time
     106 * Add series resistor between battery positive and reverse current diode for UL two level protection
     107 * Add processor watchdog support by connecting WDOG_B to PMIC PWRON input
     108 * Add support for UHS-1 MMC cards to run at their full speed capability
     109 * Reduce PCIe clock jitter to GEN2 levels by replacing clock buffer with clock generator and connecting clock output back to processor PCIe clock input
     110 * Replace RGMII_TXCLK series resistor with 22.1 ohm device and add second 22.1 series resistor to RGMII_RXCLK to reduce radiated emissions
     111 * Improve processor core voltage rails by adding on 22uF capacitor to both VDD_ARM and VDD_SOC and widening copper fills
     112 * Update SIM/uSD socket footprint and move 0.2mm closer to board edge for improved manufacturing
     113 * Move USB signals away from SIM/uSD mounting tab slot to improve fabrication processes
     114
     115
     116
     117[=#gw522x]
     118== GW522x ==
     119
     120=== Revision A ===
    319121Date: 01/29/2015
    320 </p>
    321 <ul><li>Initial release
    322 </li></ul><h3 id="RevisionA.11">Revision A.1</h3>
    323 <p>
     122 * Initial release
     123
     124=== Revision A.1 ===
    324125Date: 04/21/2015
    325 </p>
    326 <ul><li>Improve PCIe clock termination
    327 </li></ul><h3 id="RevisionB1">Revision B</h3>
    328 <p>
     126 * Improve PCIe clock termination
     127
     128=== Revision B ===
    329129Date: 04/29/2015
    330 </p>
    331 <ul><li>Reduce PORJ pullup resistor value for faster rise time
    332 </li><li>Improve PCIe clock termination
    333 </li><li>Add processor watchdog support by connecting WDOG_B to PMIC PWRON input (see <a class="wiki" href="/wiki/ventana/errata#hw12">Errata HW12</a>)
    334 </li><li>Add support for UHS-1 MMC cards to run at their full speed capability (see <a class="wiki" href="/wiki/ventana/errata#hw16">Errata HW16</a>)
    335 </li><li>Correct the SPI connector bottom side silkscreen pin labels
    336 </li></ul><h3 id="RevisionC1">Revision C</h3>
    337 <p>
     130 * Reduce PORJ pullup resistor value for faster rise time
     131 * Improve PCIe clock termination
     132 * Add processor watchdog support by connecting WDOG_B to PMIC PWRON input (see [[wiki:ventana/errata#hw12 Errata HW12])
     133 * Add support for UHS-1 MMC cards to run at their full speed capability (see [wiki:ventana/errata#hw16 Errata HW16])
     134 * Correct the SPI connector bottom side silkscreen pin labels
     135
     136=== Revision C ===
    338137Date: 07/22/2015
    339 </p>
    340 <ul><li>Add series resistor between battery positive and reverse current diode for UL two level protection
    341 </li><li>Reduce PCIe clock jitter to GEN2 levels by replacing clock buffer with clock generator and connecting clock output back to processor PCIe clock input (see <a class="wiki" href="/wiki/ventana/errata#hw14">Errata HW14</a>)
    342 </li><li>Replace RGMII_TXCLK series resistor with 22.1 ohm device and add second 22.1 series resistor to RGMII_RXCLK to reduce radiated emissions
    343 </li><li>Add optional 3.3V primary power supply bypass connector to power the board with well regulated 3.3V +/-5% input
    344 </li><li>Improve processor core voltage rails by adding on 22uF capacitor to both VDD_ARM and VDD_SOC and widening copper fills
    345 </li></ul><h3 id="RevisionD2">Revision D</h3>
    346 <p>
     138 * Add series resistor between battery positive and reverse current diode for UL two level protection
     139 * Reduce PCIe clock jitter to GEN2 levels by replacing clock buffer with clock generator and connecting clock output back to processor PCIe clock input (see [wiki:ventana/errata#hw14 Errata HW14])
     140 * Replace RGMII_TXCLK series resistor with 22.1 ohm device and add second 22.1 series resistor to RGMII_RXCLK to reduce radiated emissions
     141 * Add optional 3.3V primary power supply bypass connector to power the board with well regulated 3.3V +/-5% input
     142 * Improve processor core voltage rails by adding on 22uF capacitor to both VDD_ARM and VDD_SOC and widening copper fills
     143
     144=== Revision D ===
    347145Date: 01/04/2017:
    348 </p>
    349 <ul><li>Add wide range linear regulator for powering the GSC battery from the input voltage when board power is turned off to extend battery life
    350 </li><li>Add option for external GSC battery connector
    351 </li><li>Replaced GbE crystal for increased lifespan
    352 </li></ul><h3 id="RevisionD.1">Revision D.1</h3>
    353 <p>
     146 * Add wide range linear regulator for powering the GSC battery from the input voltage when board power is turned off to extend battery life
     147 * Add option for external GSC battery connector
     148 * Replaced GbE crystal for increased lifespan
     149
     150=== Revision D.1 ===
    354151Date: 01/06/2017:
    355 </p>
    356 <ul><li>Add LDO output capacitor.
    357 </li></ul><h2 id="GW53xx">GW53xx</h2>
    358 <h3 id="RevisionA3">Revision A</h3>
    359 <p>
     152 * Add LDO output capacitor.
     153
     154
     155[=#gw53xx]
     156== GW53xx ==
     157
     158=== Revision A ===
    360159Date: 12/17/2013
    361 </p>
    362 <ul><li>Initial revision
    363 </li></ul><h3 id="RevisionA.12">Revision A.1</h3>
    364 <p>
     160 * Initial revision
     161
     162=== Revision A.1 ===
    365163Date: 12/17/2013
    366 </p>
    367 <ul><li>Replace decoupling capacitors on the clock buffer input with series resistors for improved PCIe clock performance
    368 </li></ul><h3 id="RevisionB2">Revision B</h3>
    369 <p>
     164 * Replace decoupling capacitors on the clock buffer input with series resistors for improved PCIe clock performance
     165
     166=== Revision B ===
    370167Date: 12/05/2013
    371 </p>
    372 <ul><li>Add resistor load option for I2C support via DIO connector
    373 </li></ul><h3 id="RevisionC2">Revision C</h3>
    374 <p>
     168 * Add resistor load option for I2C support via DIO connector
     169
     170=== Revision C ===
    375171Date: 07/29/2015
    376 </p>
    377 <ul><li>Replace obsolete J2 uSD/SIM socket with functionally equivalent socket
    378 </li><li>Improved RJ45 TVS arrays
    379 </li><li>Add 3.3V voltage translator to 2.5V PCISKTx_RSTJ signals for increased voltage margin
    380 </li><li>Remove capacitor on tamper switch input to reduce switch debounce time constant (see <a class="wiki" href="/wiki/ventana/errata#hw4">Errata HW4</a>)
    381 </li><li>Add Schottky diode to USB_H1_VBUS net to prevent i.MX6 backfeed when board is powered off and active USB cable is plugged in (see <a class="wiki" href="/wiki/ventana/errata#hw8">Errata HW8</a>)
    382 </li><li>Connect GPS PPS signal to reserved pin on both Mini-PCIe sockets pin 49 through unloaded configuration resistors
    383 </li><li>Add optional GSC analog input to J10.4 connector through divide by two configuration resistors unloading the series resistor for backwards compatibility
    384 </li><li>Increase USB boost converter power to 1.6A max current (see <a class="wiki" href="/wiki/ventana/errata#hw6">Errata HW6</a>)
    385 </li></ul><h3 id="RevisionD3">Revision D</h3>
    386 <p>
     172 * Replace obsolete J2 uSD/SIM socket with functionally equivalent socket
     173 * Improved RJ45 TVS arrays
     174 * Add 3.3V voltage translator to 2.5V PCISKTx_RSTJ signals for increased voltage margin
     175 * Remove capacitor on tamper switch input to reduce switch debounce time constant (see [wiki:ventana/errata#hw4 Errata HW4])
     176 * Add Schottky diode to USB_H1_VBUS net to prevent i.MX6 backfeed when board is powered off and active USB cable is plugged in (see [wiki:ventana/errata#hw8 Errata HW8])
     177 * Connect GPS PPS signal to reserved pin on both Mini-PCIe sockets pin 49 through unloaded configuration resistors
     178 * Add optional GSC analog input to J10.4 connector through divide by two configuration resistors unloading the series resistor for backwards compatibility
     179 * Increase USB boost converter power to 1.6A max current (see [wiki:ventana/errata#hw6 Errata HW6])
     180
     181=== Revision D ===
    387182Date: 10/10/2014
    388 </p>
    389 <ul><li>Move watchdog timer from WDOG2_B to WDOG1_B for mainstream Linux support
    390 </li><li>Add 32.768KHz crystal to processor real time clock for increased watchdog timer and Linux time of day accuracy
    391 </li><li>Replace audio codec logic ground connection with two zero ohm configuration resistors for connecting to analog ground by default and audio connector as an option
    392 </li><li>Add option to bypass CAN bus transceiver to provide additional TTL UARt
    393 </li><li>Add option to bypass RS232 transceiver
    394 </li></ul><h3 id="RevisionE">Revision E</h3>
    395 <p>
     183 * Move watchdog timer from WDOG2_B to WDOG1_B for mainstream Linux support
     184 * Add 32.768KHz crystal to processor real time clock for increased watchdog timer and Linux time of day accuracy
     185 * Replace audio codec logic ground connection with two zero ohm configuration resistors for connecting to analog ground by default and audio connector as an option
     186 * Add option to bypass CAN bus transceiver to provide additional TTL UARt
     187 * Add option to bypass RS232 transceiver
     188
     189=== Revision E ===
    396190Date: 03/31/2015
    397 </p>
    398 <ul><li>Reduce PORJ pullup resistor value for faster rise time
    399 </li><li>Improve processor core voltage rails by adding on 22uF capacitor to both VDD_ARM and VDD_SOC and widening copper fills
    400 </li><li>Reduce PCIe clock jitter to GEN2 levels by replacing clock buffer with clock generator and connecting clock output back to processor PCIe clock input (see <a class="wiki" href="/wiki/ventana/errata#hw14">Errata HW14</a>)
    401 </li><li>Add processor external watchdog support by connecting WDOG_B to PMIC PWRON input
    402 </li><li>Add support for UHS-1 MMC cards to run at their full speed capability (see <a class="wiki" href="/wiki/ventana/errata#hw16">Errata HW16</a>)
    403 </li></ul><h3 id="RevisionF1">Revision F</h3>
    404 <ul><li>Improve 5V Boost Supply for powering CAN, HDMI, and LVDS. (see Resolves <a class="wiki" href="/wiki/ventana/errata#HW18GW53xx-CDE5Vinrushcurrentlimitedat100mA">Errata HW18</a>
    405 </li><li>Reduce emissions / EMI on RGMII clock signal with 22 ohm series resistor
    406 </li><li>Improve voltage rails with larger traces and capacitors for greater stability when operating in LDO-Bypass mode
    407 </li><li>Improve USB host connector durability
    408 </li></ul><h2 id="GW54xx">GW54xx</h2>
    409 <h3 id="RevisionB3">Revision B</h3>
    410 <p>
     191 * Reduce PORJ pullup resistor value for faster rise time
     192 * Improve processor core voltage rails by adding on 22uF capacitor to both VDD_ARM and VDD_SOC and widening copper fills
     193 * Reduce PCIe clock jitter to GEN2 levels by replacing clock buffer with clock generator and connecting clock output back to processor PCIe clock input (see [wiki:ventana/errata#hw14 Errata HW14])
     194 * Add processor external watchdog support by connecting WDOG_B to PMIC PWRON input
     195 * Add support for UHS-1 MMC cards to run at their full speed capability (see [wiki:ventana/errata#hw16 Errata HW16])
     196
     197=== Revision F ===
     198 * Improve 5V Boost Supply for powering CAN, HDMI, and LVDS. (resolves [wiki:ventana/errata#hw18 Errata HW18])
     199 * Reduce emissions / EMI on RGMII clock signal with 22 ohm series resistor
     200 * Improve voltage rails with larger traces and capacitors for greater stability when operating in LDO-Bypass mode
     201 * Improve USB host connector durability
     202
     203
     204[=#gw54xx]
     205== GW54xx ==
     206
     207=== Revision B ===
    411208Date: 03/14/2013
    412 </p>
    413 <ul><li>Initial Revision
    414 </li></ul><h3 id="RevisionC3">Revision C</h3>
    415 <p>
     209 * Initial Revision
     210
     211=== Revision C ===
    416212Date: 07/16/2013
    417 </p>
    418 <ul><li>Add optional 3.3V primary power supply bypass connector to power the board with well regulated 3.3V +/-5% input
    419 </li><li>Fix Analog Video input functionality (see <a class="wiki" href="/wiki/ventana/errata#hw1">Errata HW1</a>)
    420 </li><li>Fix GPS Antenna Short Protection (see <a class="wiki" href="/wiki/ventana/errata#hw2">Errata HW2</a>)
    421 </li><li>Replace MMA8451 accelerometer with FXOS8700 accelerometer/magnetometer
    422 </li><li>Replace GSP with Wi2Wi Wi2Wi W2SG0008i for improved functionality
    423 </li><li>Replace UART handshake with additional UART tx/rx and made previous hardware handshaking a resistor loading option
    424 </li></ul><h3 id="RevisionD4">Revision D</h3>
    425 <p>
     213 * Add optional 3.3V primary power supply bypass connector to power the board with well regulated 3.3V +/-5% input
     214 * Fix Analog Video input functionality (see [wiki:ventana/errata#hw1 Errata HW1])
     215 * Fix GPS Antenna Short Protection (see [wiki:ventana/errata#hw2 Errata HW2])
     216 * Replace MMA8451 accelerometer with FXOS8700 accelerometer/magnetometer
     217 * Replace GSP with Wi2Wi Wi2Wi W2SG0008i for improved functionality
     218 * Replace UART handshake with additional UART tx/rx and made previous hardware handshaking a resistor loading option
     219
     220=== Revision D ===
    426221Date: 01/13/2014
    427 </p>
    428 <ul><li>Add optional serial console bypass to the RS485 connector
    429 </li><li>Add PoE diodes to second Ethernet connector for increased functionality
    430 </li><li>Add i.MX6 GPIO control of mini-PCIe <a class="missing wiki">WiFi?</a> disable
    431 </li><li>Add installed SIM card outline to silkscreen for ease of use
    432 </li></ul><h3 id="RevisionE1">Revision E</h3>
    433 <p>
     222 * Add optional serial console bypass to the RS485 connector
     223 * Add PoE diodes to second Ethernet connector for increased functionality
     224 * Add i.MX6 GPIO control of mini-PCIe WiFi? disable
     225 * Add installed SIM card outline to silkscreen for ease of use
     226
     227=== Revision E ===
    434228Date: 6/28/2016:
    435 </p>
    436 <ul><li>Add diode to prevent power backfeed when board is powered off and a USB cable is plugged in to a powered host (see <a class="wiki" href="/wiki/ventana/errata#hw8">Errata HW8</a>)
    437 </li><li>Connect GPS PPS signal to reserved pin 49 of J9 (Top right) and J10 (Bottomr left/center) Mini-PCIe sockets through unloaded configuration resistors as a build option
    438 </li><li>Add 3.3V voltage translator to miniPCIe socket PERST# signals for increased voltage margin
    439 </li><li>Unload capacitor C473 to resolve issue with off-board tamper signal (see  <a class="wiki" href="/wiki/ventana/errata#hw4">Errata HW4</a>)
    440 </li><li>Add 32.768KHz crystal to processor real time clock for increased watchdog timer and Linux time of day accuracy
    441 </li><li>Add ability to bypass CAN transceiver through loadable resistors
    442 </li><li>Add ability to bypass UART2 RS232 transceiver through loadable resistors
    443 </li><li>Improved GPS Antenna short circuit fault monitoring by lowering trip threshold to allow for higher power active antennas
    444 </li><li>Replace audio codec logic ground connection with two zero ohm configuration resistors for connecting to analog ground by default audio connector J28.5 as an option
    445 </li><li>Add 0 to 5V GSC analog input available via 3-byte register at 0x1A to previously unused J27.4 connector
    446 </li><li>Add resistor loading option to provide 3.3V to J16.3
    447 </li><li>Add resistor loading option to provide 5.0V to J16.4
    448 </li><li>Add series resistor between battery positive and reverse current diode for UL two level protection
    449 </li><li>Add processor watchdog support by connecting WDOG2_B to PMIC PWRON input (see <a class="wiki" href="/wiki/ventana/errata#hw12">Errata HW12</a>)
    450 </li><li>Reduce PCIe clock jitter to GEN2 levels by routing clock generator output back to processor PCIe clock input (see <a class="wiki" href="/wiki/ventana/errata#hw14">Errata HW14</a>)
    451 </li><li>Add support for UHS-1 MMC cards to run at their full speed capability (see <a class="wiki" href="/wiki/ventana/errata#hw16">Errata HW16</a>)
    452 </li><li>Add a reset generator to improve signalling during board reset
    453 </li><li>Improve processor core voltage rails by adding on 22uF capacitor to both VDD_ARM and VDD_SOC and widening copper fills for greater stability when operating in LDO-Bypass mode as well as supporting higher frequency processors
    454 </li><li>Reduce emissions / EMI on RGMII clock signal with 22 ohm series resistor
    455 </li><li>Improve USB host connector durability
    456 </li><li>Add SPI support via J32 ((ECSPI2 SS0) (see <a class="wiki" href="/wiki/SPI">SPI</a>))
    457 </li></ul><h3 id="RevisionE.11">Revision E.1</h3>
    458 <p>
     229 * Add diode to prevent power backfeed when board is powered off and a USB cable is plugged in to a powered host (see [wiki:ventana/errata#hw8 Errata HW8])
     230 * Connect GPS PPS signal to reserved pin 49 of J9 (Top right) and J10 (Bottomr left/center)  Mini-PCIe sockets through unloaded configuration resistors as a build option
     231 * Add 3.3V voltage translator to miniPCIe socket PERST# signals for increased voltage margin
     232 * Unload capacitor C473 to resolve issue with off-board tamper signal (see [wiki:ventana/errata#hw4 Errata HW4])
     233 * Add 32.768KHz crystal to processor real time clock for increased watchdog timer and Linux time of day accuracy
     234 * Add ability to bypass CAN transceiver through loadable resistors
     235 * Add ability to bypass UART2 RS232 transceiver through loadable resistors
     236 * Improved GPS Antenna short circuit fault monitoring by lowering trip threshold to allow for higher power active antennas
     237 * Replace audio codec logic ground connection with two zero ohm configuration resistors for connecting to analog ground by default audio connector J28.5 as an option
     238 * Add 0 to 5V GSC analog input available via 3-byte register at 0x1A to previously unused J27.4 connector
     239 * Add resistor loading option to provide 3.3V to J16.3
     240 * Add resistor loading option to provide 5.0V to J16.4
     241 * Add series resistor between battery positive and reverse current diode for UL two level protection
     242 * Add processor watchdog support by connecting WDOG2_B to PMIC PWRON input (see [wiki:ventana/errata#hw12 Errata HW12])
     243 * Reduce PCIe clock jitter to GEN2 levels by routing clock generator output back to processor  PCIe clock input (see [wiki:ventana/errata#hw14 Errata HW14])
     244 * Add support for UHS-1 MMC cards to run at their full speed capability (see [wiki:ventana/errata#hw16 Errata HW16])
     245 * Add a reset generator to improve signalling during board reset
     246 * Improve processor core voltage rails by adding on 22uF capacitor to both VDD_ARM and VDD_SOC and widening copper fills for greater stability when operating in LDO-Bypass mode as well as supporting higher frequency processors
     247 * Reduce emissions / EMI on RGMII clock signal with 22 ohm series resistor
     248 * Improve USB host connector durability
     249 * Add SPI support via J32 ((ECSPI2 SS0) (see SPI))
     250
     251=== Revision E.1 ===
    459252Date: 6/29/2016:
    460 </p>
    461 <ul><li>Increase VDD_1P8 current flow with soldered wire
    462 </li></ul><h3 id="RevisionF2">Revision F</h3>
    463 <p>
     253 * Increase VDD_1P8 current flow with soldered wire
     254
     255=== Revision F ===
    464256Date: 11/01/2016:
    465 </p>
    466 <ul><li>Increase VDD_1P8 trace width to remove need for wire from Revision E.1
    467 </li></ul><h2 id="GW551x">GW551x</h2>
    468 <h3 id="RevisionA.13">Revision A.1</h3>
    469 <p>
     257 * Increase VDD_1P8 trace width to remove need for wire from Revision E.1
     258
     259
     260
     261[=#gw551x]
     262== GW551x ==
     263
     264=== Revision A.1 ===
    470265Date: 01/08/2015
    471 </p>
    472 <ul><li>Initial release
    473 </li></ul><h3 id="RevisionB4">Revision B</h3>
    474 <p>
     266 * Initial release
     267
     268=== Revision B ===
    475269Date: 02/18/2015
    476 </p>
    477 <ul><li>Move passives further from mounting holes
    478 </li><li>Increase spacing between the HDMI input and HDMI output connectors
    479 </li><li>Reduce PORJ pullup resistor value for faster rise time
    480 </li><li>Improve HDMI video input to allow YUV422 semi-planar input allowing 1080p@60Hz (see <a class="wiki" href="/wiki/ventana/errata#hw9">Errata HW9</a>)
    481 </li><li>Fix USB OTG device mode (see <a class="wiki" href="/wiki/ventana/errata#hw10">Errata HW10</a>)
    482 </li></ul><h3 id="RevisionC4">Revision C</h3>
    483 <p>
     270 * Move passives further from mounting holes
     271 * Increase spacing between the HDMI input and HDMI output connectors
     272 * Reduce PORJ pullup resistor value for faster rise time
     273 * Improve HDMI video input to allow YUV422 semi-planar input allowing 1080p@60Hz (see [wiki:ventana/errata#hw9 Errata HW9])
     274 * Fix USB OTG device mode (see [wiki:ventana/errata#hw10 Errata HW10])
     275
     276=== Revision C ===
    484277Date: 10/06/2016:
    485 </p>
    486 <ul><li>Add series resistor between battery positive and reverse current diode for UL two level protection
    487 </li><li>Add processor external watchdog support by connecting WDOG_B to PMIC PWRON input (see [<a class="wiki" href="/wiki/ventana/errata#hw12">wiki:ventana/errata#hw12</a> Errata HW12)
    488 </li><li>Reduce PCIe clock jitter to GEN2 levels by adding a clock generator providing the CPU and PCIe socket clock input (see <a class="wiki" href="/wiki/ventana/errata#hw14">Errata HW14</a>)
    489 </li><li>Adjust processor drive on CPU crystal for increased lifespan
    490 </li><li>Improve processor core voltage rails by adding on 22uF capacitor to both VDD_ARM and VDD_SOC and widening copper fills
    491 </li></ul><h3 id="RevisionC.11">Revision C.1</h3>
    492 <p>
     278 * Add series resistor between battery positive and reverse current diode for UL two level protection
     279 * Add processor external watchdog support by connecting WDOG_B to PMIC PWRON input (see [wiki:ventana/errata#hw12 Errata HW12])
     280 * Reduce PCIe clock jitter to GEN2 levels by adding a clock generator providing the CPU and PCIe socket clock input (see [wiki:ventana/errata#hw14 Errata HW14])
     281 * Adjust processor drive on CPU crystal for increased lifespan
     282 * Improve processor core voltage rails by adding on 22uF capacitor to both VDD_ARM and VDD_SOC and widening copper fills
     283
     284=== Revision C.1 ===
    493285Date: 02/10/2017:
    494 </p>
    495 <ul><li>Fix HS/CLK on HDMI Input
    496 </li></ul><h3 id="RevisionD5">Revision D</h3>
    497 <p>
     286 * Fix HS/CLK on HDMI Input
     287
     288=== Revision D ===
    498289Date: 03/02/2017:
    499 </p>
    500 <ul><li>Fix YUV422 semi-planar HDMI input to support 1080p60
    501 </li></ul><h2 id="GW552x">GW552x</h2>
    502 <h3 id="RevisionA.2">Revision A.2</h3>
    503 <p>
     290 * Fix YUV422 semi-planar HDMI input to support 1080p60
     291
     292
     293[=#gw552x]
     294== GW552x ==
     295
     296=== Revision A.2 ===
    504297Date: 11/19/2014
    505 </p>
    506 <ul><li>Initial release
    507 </li></ul><h3 id="RevisionB5">Revision B</h3>
    508 <p>
     298 * Initial release
     299
     300=== Revision B ===
    509301Date: 07/29/2015
    510 </p>
    511 <ul><li>Add diode to prevent power backfeed when board is powered off and a USB cable is plugged in to a powered host (see <a class="wiki" href="/wiki/ventana/errata#hw8">Errata HW8</a>)
    512 </li><li>Add 3.3V voltage translator to 2.5V PCISKTx_RSTJ signals for increased voltage margin
    513 </li><li>Move watchdog timer from WDOG2_B to WDOG1_B for mainstream Linux support
    514 </li><li>Add 32.768KHz crystal to processor real time clock for increased watchdog timer and Linux time of day accuracy
    515 </li><li>move barrel jack to the opposite side of the power supply to eliminate interface between HDMI and barrel jack mating connectors
    516 </li><li>add software controllable USB switch to configure one of the panel USB ports for either host or device
    517 </li></ul><h3 id="RevisionC5">Revision C</h3>
    518 <p>
     302 * Add diode to prevent power backfeed when board is powered off and a USB cable is plugged in to a powered host (see [wiki:ventana/errata#hw8 Errata HW8])
     303 * Add 3.3V voltage translator to 2.5V PCISKTx_RSTJ signals for increased voltage margin
     304 * Move watchdog timer from WDOG2_B to WDOG1_B for mainstream Linux support
     305 * Add 32.768KHz crystal to processor real time clock for increased watchdog timer and Linux time of day accuracy
     306 * Move barrel jack to the opposite side of the power supply to eliminate interface between HDMI and barrel jack mating connectors
     307 * Add software controllable USB switch to configure one of the panel USB ports for either host or device
     308
     309=== Revision C ===
    519310Date: 03/29/2016
    520 </p>
    521 <ul><li>Reduce PORJ pullup resistor value for faster rise time
    522 </li><li>Add series resistor between battery positive and reverse current diode for UL two level protection
    523 </li><li>Adjust processor drive on CPU crystal for increased lifespan
    524 </li><li>Improve processor core voltage rails by adding on 22uF capacitor to both VDD_ARM and VDD_SOC and widening copper fills
    525 </li><li>Add processor external watchdog support by connecting WDOG_B to PMIC PWRON input
    526 </li><li>Reduce PCIe clock jitter to GEN2 levels by adding a clock generator providing the CPU and PCIe socket clock input (see <a class="wiki" href="/wiki/ventana/errata#hw14">Errata HW14</a>)
    527 </li><li>Add resistor load option for SPI support via J8 ((ECSPI3 J8.1:SS0# J8.2:SCLK, J8.17:MOSI, J8.18:MISO see <a class="wiki" href="/wiki/SPI">SPI</a>))
    528 </li><li>Add resistor load option for I2C support via J8 ((I2C3: J8.17:SCL, J8.18:SDA))
    529 </li><li>Move battery to reduce heat impact on it's lifespan
    530 </li><li>Replace J8 10pin connector with 20pin connector
    531 </li></ul><h3 id="RevisionC.12">Revision C.1</h3>
    532 <p>
     311 * Reduce PORJ pullup resistor value for faster rise time
     312 * Add series resistor between battery positive and reverse current diode for UL two level protection
     313 * Adjust processor drive on CPU crystal for increased lifespan
     314 * Improve processor core voltage rails by adding on 22uF capacitor to both VDD_ARM and VDD_SOC  and widening copper fills
     315 * Add processor external watchdog support by connecting WDOG_B to PMIC PWRON input
     316 * Reduce PCIe clock jitter to GEN2 levels by adding a clock generator providing the CPU and PCIe socket clock input (see [wiki:ventana/errata#hw14 Errata HW14])
     317 * Add resistor load option for SPI support via J8 ((ECSPI3 J8.1:SS0# J8.2:SCLK, J8.17:MOSI, J8.18:MISO see SPI))
     318 * Add resistor load option for I2C support via J8 ((I2C3: J8.17:SCL, J8.18:SDA))
     319 * Move battery to reduce heat impact on it's lifespan
     320 * Replace J8 10pin connector with 20pin connector
     321
     322=== Revision C.1 ===
    533323Date: 10/18/2016
    534 </p>
    535 <ul><li>Replace J8 20pin connector with 10pin connector (20pin connector available as option)
    536 </li></ul><h2 id="GW553x">GW553x</h2>
    537 <h3 id="RevisionB6">Revision B</h3>
    538 <p>
     324 * Replace J8 20pin connector with 10pin connector (20pin connector available as option)
     325
     326
     327[=#gw553x]
     328== GW553x ==
     329
     330=== Revision B ===
    539331Date: 08/30/2016
    540 </p>
    541 <ul><li>Add processor external watchdog support by connecting WDOG_B to PMIC PWRON input
    542 </li><li>Replace 2-pin connector with reset switch for standard product (2-pin connector is optional)
    543 </li><li>Replace 2-pin connector with user LED (2-pin connector is optional)
    544 </li></ul><h1 id="LagunaFamily">Laguna Family</h1>
    545 <h2 id="GW2388">GW2388</h2>
    546 <p>
    547 Please see <a class="ext-link" href="http://www.gateworks.com/usermanuals"><span class="icon">​</span>GW2388 User Manual</a> and view revision notes at the end.
    548 </p>
    549 <p>
     332 * Add processor external watchdog support by connecting WDOG_B to PMIC PWRON input
     333 * Replace 2-pin connector with reset switch for standard product (2-pin connector is optional)
     334 * Replace 2-pin connector with user LED (2-pin connector is optional)
     335
     336
     337[=#laguna]
     338= Laguna Family =
     339
     340[=#gw2388]
     341=== GW2388 ===
     342
     343Please see ​GW2388 User Manual and view revision notes at the end.
     344
    550345Please contact support
    551 </p>
    552 <h1 id="OtherSBCFamilies">Other SBC Families</h1>
    553 <p>
     346
     347= Other SBC Families =
    554348Please contact support
    555 </p>
    556 
    557 }}}