{{{#!html        
          <div id="wikipage" class="trac-content"><h1 id="GateworksSingleBoardComputersRevisions">Gateworks Single Board Computers Revisions</h1>
<p>
</p><div class="wiki-toc">
<ol>
  <li>
    <a href="#GateworksSingleBoardComputersRevisions">Gateworks Single Board Computers Revisions</a>
  </li>
  <li>
    <a href="#VentanaFamily">Ventana Family</a>
    <ol>
      <li>
        <a href="#GW51xx">GW51xx</a>
        <ol>
          <li>
            <a href="#RevisionA">Revision A</a>
          </li>
          <li>
            <a href="#RevisionB">Revision B</a>
          </li>
          <li>
            <a href="#RevisionB.1">Revision B.1</a>
          </li>
          <li>
            <a href="#RevisionC">Revision C</a>
          </li>
          <li>
            <a href="#RevisionD">Revision D</a>
          </li>
          <li>
            <a href="#RevisionE.1">Revision E.1</a>
          </li>
          <li>
            <a href="#RevisionF">Revision F</a>
          </li>
        </ol>
      </li>
      <li>
        <a href="#GW520x">GW520x</a>
        <ol>
          <li>
            <a href="#RevisionA1">Revision A</a>
          </li>
          <li>
            <a href="#RevisionA.1">Revision A.1</a>
          </li>
          <li>
            <a href="#RevisionB.11">Revision B.1</a>
          </li>
          <li>
            <a href="#RevisionC.1">Revision C.1</a>
          </li>
          <li>
            <a href="#RevisionC.2">Revision C.2</a>
          </li>
          <li>
            <a href="#RevisionD1">Revision D</a>
          </li>
        </ol>
      </li>
      <li>
        <a href="#GW522x">GW522x</a>
        <ol>
          <li>
            <a href="#RevisionA2">Revision A</a>
          </li>
          <li>
            <a href="#RevisionA.11">Revision A.1</a>
          </li>
          <li>
            <a href="#RevisionB1">Revision B</a>
          </li>
          <li>
            <a href="#RevisionC1">Revision C</a>
          </li>
          <li>
            <a href="#RevisionD2">Revision D</a>
          </li>
          <li>
            <a href="#RevisionD.1">Revision D.1</a>
          </li>
        </ol>
      </li>
      <li>
        <a href="#GW53xx">GW53xx</a>
        <ol>
          <li>
            <a href="#RevisionA3">Revision A</a>
          </li>
          <li>
            <a href="#RevisionA.12">Revision A.1</a>
          </li>
          <li>
            <a href="#RevisionB2">Revision B</a>
          </li>
          <li>
            <a href="#RevisionC2">Revision C</a>
          </li>
          <li>
            <a href="#RevisionD3">Revision D</a>
          </li>
          <li>
            <a href="#RevisionE">Revision E</a>
          </li>
          <li>
            <a href="#RevisionF1">Revision F</a>
          </li>
        </ol>
      </li>
      <li>
        <a href="#GW54xx">GW54xx</a>
        <ol>
          <li>
            <a href="#RevisionB3">Revision B</a>
          </li>
          <li>
            <a href="#RevisionC3">Revision C</a>
          </li>
          <li>
            <a href="#RevisionD4">Revision D</a>
          </li>
          <li>
            <a href="#RevisionE1">Revision E</a>
          </li>
          <li>
            <a href="#RevisionE.11">Revision E.1</a>
          </li>
          <li>
            <a href="#RevisionF2">Revision F</a>
          </li>
        </ol>
      </li>
      <li>
        <a href="#GW551x">GW551x</a>
        <ol>
          <li>
            <a href="#RevisionA.13">Revision A.1</a>
          </li>
          <li>
            <a href="#RevisionB4">Revision B</a>
          </li>
          <li>
            <a href="#RevisionC4">Revision C</a>
          </li>
          <li>
            <a href="#RevisionC.11">Revision C.1</a>
          </li>
          <li>
            <a href="#RevisionD5">Revision D</a>
          </li>
        </ol>
      </li>
      <li>
        <a href="#GW552x">GW552x</a>
        <ol>
          <li>
            <a href="#RevisionA.2">Revision A.2</a>
          </li>
          <li>
            <a href="#RevisionB5">Revision B</a>
          </li>
          <li>
            <a href="#RevisionC5">Revision C</a>
          </li>
          <li>
            <a href="#RevisionC.12">Revision C.1</a>
          </li>
        </ol>
      </li>
      <li>
        <a href="#GW553x">GW553x</a>
        <ol>
          <li>
            <a href="#RevisionB6">Revision B</a>
          </li>
        </ol>
      </li>
    </ol>
  </li>
  <li>
    <a href="#LagunaFamily">Laguna Family</a>
    <ol>
      <li>
        <a href="#GW2388">GW2388</a>
      </li>
    </ol>
  </li>
  <li>
    <a href="#OtherSBCFamilies">Other SBC Families</a>
  </li>
</ol>
</div><p>
</p>
<p>
This page is to describe the difference between hardware revisions.
</p>
<h1 id="VentanaFamily">Ventana Family</h1>
<h2 id="GW51xx">GW51xx</h2>
<h3 id="RevisionA">Revision A</h3>
<p>
Date: 04/19/2013
</p>
<ul><li>Initial release
</li></ul><h3 id="RevisionB">Revision B</h3>
<p>
Date: 09/17/2013
</p>
<ul><li>Add VDD_HIGH to GSC analog input for voltage monitoring
</li><li>Select GPS 4800 baud NMEA protocol by default
</li><li>Reduce voltage drop for USB OTG VBUS
</li><li>Adjust 5V boost converter feedback resistors for more accurate 5V
</li><li>Add i.MX6 GPIO control of mini-PCIe <a class="missing wiki">WiFi?</a> disable
</li><li>Move mounting holes to match other Ventana boards
</li><li>Improve HDMI and OTG connectors footprints
</li><li>Modify JTAG route from a star to a daisy chain topology
</li></ul><h3 id="RevisionB.1">Revision B.1</h3>
<p>
Date: 11/08/2013
</p>
<ul><li>Eliminate possible high input voltage on the switching supply enable input by removing unnecessary R34 pullup
</li></ul><h3 id="RevisionC">Revision C</h3>
<p>
Date: 09/04/2014
</p>
<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>)
</li><li>Connect GPS PPS signal to reserved pin 49 on Mini-PCIe socket through unloaded configuration resistor
</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
</li><li>Add GSC analog input option to DIO
</li><li>Replace U15 input power supply to increase operating voltage range and improved manufacturability
</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>)
</li></ul><p>
 
</p>
<h3 id="RevisionD">Revision D</h3>
<p>
Date: 03/05/2015
</p>
<ul><li>Add optional 3.3V primary power supply bypass connector to power the board with well regulated 3.3V +/-5% input
</li><li>Move watchdog timer from WDOG2_B to WDOG1_B for mainstream Linux support
</li><li>Add 32.768KHz crystal to processor real time clock for increased watchdog timer and Linux time of day accuracy
</li><li>Reduce PORJ pullup resistor value for faster rise time
</li><li>Improve inductor footprints for improved manufacturability
</li></ul><h3 id="RevisionE.1">Revision E.1</h3>
<p>
Date: 12/23/2015
</p>
<ul><li>Add series resistor between battery positive and reverse current diode for UL two level protection
</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>)
</li><li>Add processor external watchdog support by connecting WDOG_B to PMIC PWRON input
</li></ul><h3 id="RevisionF">Revision F</h3>
<p>
Date: 10/17/2016:
</p>
<ul><li>Reduce emissions / EMI on RGMII clock signal with 22 ohm series resistor
</li><li>Replaced GbE crystal for increased lifespan
</li></ul><h2 id="GW520x">GW520x</h2>
<h3 id="RevisionA1">Revision A</h3>
<p>
Date: 10/18/2013
</p>
<ul><li>Initial Release
</li></ul><h3 id="RevisionA.1">Revision A.1</h3>
<p>
Date: 10/18/2013
</p>
<ul><li>Replace decoupling capacitors on the clock buffer input with series resistors for improved PCIe clock performance.
</li></ul><h3 id="RevisionB.11">Revision B.1</h3>
<p>
Date: 1/30/2014
</p>
<ul><li>Add WiFi disable signal to all Mini-PCIe sockets through zero ohm resistors
</li><li>Add optional load JST 1x2x2mm connector under the pushbutton switch
</li><li>Add ability to route USB OTG to miniPCIe socket instead of front-panel via GPIO
</li><li>Replace 2-pin tamper switch connector with 3-pin connector to support CAN Bus, RS485, TTL serial and tamper switch option
</li><li>Add optional CAN Bus transceiver
</li><li>Add optional RS485 transceiver
</li><li>Add optional TTL serial bypass resistors
</li><li>Add option for 3.3V and 5V power to one pin of the digital I/O connector through unloaded configuration resistors
</li></ul><h3 id="RevisionC.1">Revision C.1</h3>
<p>
Date: 3/31/2015
</p>
<ul><li>Replace obsolete J2 uSD/SIM socket with functionally equivalent socket
</li><li>Replace 3.3V TVS arrays with 2.5V arrays for improved protection
</li><li>Add 3.3V voltage translator to both 2.5V PCISKTx_RSTJ signals for increased voltage margin
</li><li>Remove capacitor on tamper switch input to reduce switch debounce time constant
</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
</li><li>Connect I2C3 bus to the digital I/O connector through unloaded configuration resistors
</li><li>Connect GPS PPS signal to reserved pin on both Mini-PCIe sockets through unloaded configuration resistors
</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
</li><li>Add "USB" to PCIe socket silkscreen for clarification
</li></ul><h3 id="RevisionC.2">Revision C.2</h3>
<p>
Date: 4/3/2015
</p>
<ul><li>Add 100 ohm differential PCIe clock termination resistor for improved PCIe clock compliance.
</li></ul><h3 id="RevisionD1">Revision D</h3>
<p>
Date: 2/18/2016
</p>
<ul><li>Move watchdog timer from WDOG2_B to WDOG1_B for mainstream Linux support
</li><li>Add 32.768KHz crystal to processor real time clock for increased watchdog timer and Linux time of day accuracy
</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
</li><li>Add optional GSC analog input to J4.1 connector through divide by two configuration resistors unloading the series resistor for backwards compatibility
</li><li>Add optional 4-pin friction latching connector for micro-B OTG connector
</li><li>Add optional OTG ID pulldown resistor to configure OTG port for host operation when optional 4-pin connector is loaded
</li><li>Reduce PORJ pullup resistor value for faster rise time
</li><li>Add series resistor between battery positive and reverse current diode for UL two level protection
</li><li>Add processor watchdog support by connecting WDOG_B to PMIC PWRON input
</li><li>Add support for UHS-1 MMC cards to run at their full speed capability
</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
</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
</li><li>Improve processor core voltage rails by adding on 22uF capacitor to both VDD_ARM and VDD_SOC and widening copper fills
</li><li>Update SIM/uSD socket footprint and move 0.2mm closer to board edge for improved manufacturing
</li><li>Move USB signals away from SIM/uSD mounting tab slot to improve fabrication processes
</li></ul><h2 id="GW522x">GW522x</h2>
<h3 id="RevisionA2">Revision A</h3>
<p>
Date: 01/29/2015
</p>
<ul><li>Initial release
</li></ul><h3 id="RevisionA.11">Revision A.1</h3>
<p>
Date: 04/21/2015
</p>
<ul><li>Improve PCIe clock termination
</li></ul><h3 id="RevisionB1">Revision B</h3>
<p>
Date: 04/29/2015
</p>
<ul><li>Reduce PORJ pullup resistor value for faster rise time
</li><li>Improve PCIe clock termination
</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>)
</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>)
</li><li>Correct the SPI connector bottom side silkscreen pin labels
</li></ul><h3 id="RevisionC1">Revision C</h3>
<p>
Date: 07/22/2015
</p>
<ul><li>Add series resistor between battery positive and reverse current diode for UL two level protection
</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>)
</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
</li><li>Add optional 3.3V primary power supply bypass connector to power the board with well regulated 3.3V +/-5% input
</li><li>Improve processor core voltage rails by adding on 22uF capacitor to both VDD_ARM and VDD_SOC and widening copper fills
</li></ul><h3 id="RevisionD2">Revision D</h3>
<p>
Date: 01/04/2017:
</p>
<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
</li><li>Add option for external GSC battery connector
</li><li>Replaced GbE crystal for increased lifespan
</li></ul><h3 id="RevisionD.1">Revision D.1</h3>
<p>
Date: 01/06/2017:
</p>
<ul><li>Add LDO output capacitor.
</li></ul><h2 id="GW53xx">GW53xx</h2>
<h3 id="RevisionA3">Revision A</h3>
<p>
Date: 12/17/2013
</p>
<ul><li>Initial revision
</li></ul><h3 id="RevisionA.12">Revision A.1</h3>
<p>
Date: 12/17/2013
</p>
<ul><li>Replace decoupling capacitors on the clock buffer input with series resistors for improved PCIe clock performance
</li></ul><h3 id="RevisionB2">Revision B</h3>
<p>
Date: 12/05/2013
</p>
<ul><li>Add resistor load option for I2C support via DIO connector
</li></ul><h3 id="RevisionC2">Revision C</h3>
<p>
Date: 07/29/2015
</p>
<ul><li>Replace obsolete J2 uSD/SIM socket with functionally equivalent socket
</li><li>Improved RJ45 TVS arrays
</li><li>Add 3.3V voltage translator to 2.5V PCISKTx_RSTJ signals for increased voltage margin
</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>)
</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>)
</li><li>Connect GPS PPS signal to reserved pin on both Mini-PCIe sockets pin 49 through unloaded configuration resistors
</li><li>Add optional GSC analog input to J10.4 connector through divide by two configuration resistors unloading the series resistor for backwards compatibility
</li><li>Increase USB boost converter power to 1.6A max current (see <a class="wiki" href="/wiki/ventana/errata#hw6">Errata HW6</a>)
</li></ul><h3 id="RevisionD3">Revision D</h3>
<p>
Date: 10/10/2014
</p>
<ul><li>Move watchdog timer from WDOG2_B to WDOG1_B for mainstream Linux support
</li><li>Add 32.768KHz crystal to processor real time clock for increased watchdog timer and Linux time of day accuracy
</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
</li><li>Add option to bypass CAN bus transceiver to provide additional TTL UARt
</li><li>Add option to bypass RS232 transceiver
</li></ul><h3 id="RevisionE">Revision E</h3>
<p>
Date: 03/31/2015
</p>
<ul><li>Reduce PORJ pullup resistor value for faster rise time
</li><li>Improve processor core voltage rails by adding on 22uF capacitor to both VDD_ARM and VDD_SOC and widening copper fills
</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>)
</li><li>Add processor external watchdog support by connecting WDOG_B to PMIC PWRON input
</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>)
</li></ul><h3 id="RevisionF1">Revision F</h3>
<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>
</li><li>Reduce emissions / EMI on RGMII clock signal with 22 ohm series resistor
</li><li>Improve voltage rails with larger traces and capacitors for greater stability when operating in LDO-Bypass mode
</li><li>Improve USB host connector durability 
</li></ul><h2 id="GW54xx">GW54xx</h2>
<h3 id="RevisionB3">Revision B</h3>
<p>
Date: 03/14/2013
</p>
<ul><li>Initial Revision
</li></ul><h3 id="RevisionC3">Revision C</h3>
<p>
Date: 07/16/2013
</p>
<ul><li>Add optional 3.3V primary power supply bypass connector to power the board with well regulated 3.3V +/-5% input
</li><li>Fix Analog Video input functionality (see <a class="wiki" href="/wiki/ventana/errata#hw1">Errata HW1</a>)
</li><li>Fix GPS Antenna Short Protection (see <a class="wiki" href="/wiki/ventana/errata#hw2">Errata HW2</a>)
</li><li>Replace MMA8451 accelerometer with FXOS8700 accelerometer/magnetometer
</li><li>Replace GSP with Wi2Wi Wi2Wi W2SG0008i for improved functionality
</li><li>Replace UART handshake with additional UART tx/rx and made previous hardware handshaking a resistor loading option
</li></ul><h3 id="RevisionD4">Revision D</h3>
<p>
Date: 01/13/2014
</p>
<ul><li>Add optional serial console bypass to the RS485 connector
</li><li>Add PoE diodes to second Ethernet connector for increased functionality
</li><li>Add i.MX6 GPIO control of mini-PCIe <a class="missing wiki">WiFi?</a> disable
</li><li>Add installed SIM card outline to silkscreen for ease of use
</li></ul><h3 id="RevisionE1">Revision E</h3>
<p>
Date: 6/28/2016:
</p>
<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>)
</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
</li><li>Add 3.3V voltage translator to miniPCIe socket PERST# signals for increased voltage margin
</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>)
</li><li>Add 32.768KHz crystal to processor real time clock for increased watchdog timer and Linux time of day accuracy
</li><li>Add ability to bypass CAN transceiver through loadable resistors
</li><li>Add ability to bypass UART2 RS232 transceiver through loadable resistors
</li><li>Improved GPS Antenna short circuit fault monitoring by lowering trip threshold to allow for higher power active antennas
</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
</li><li>Add 0 to 5V GSC analog input available via 3-byte register at 0x1A to previously unused J27.4 connector
</li><li>Add resistor loading option to provide 3.3V to J16.3
</li><li>Add resistor loading option to provide 5.0V to J16.4
</li><li>Add series resistor between battery positive and reverse current diode for UL two level protection
</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>)
</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>)
</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>)
</li><li>Add a reset generator to improve signalling during board reset
</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
</li><li>Reduce emissions / EMI on RGMII clock signal with 22 ohm series resistor
</li><li>Improve USB host connector durability
</li><li>Add SPI support via J32 ((ECSPI2 SS0) (see <a class="wiki" href="/wiki/SPI">SPI</a>))
</li></ul><h3 id="RevisionE.11">Revision E.1</h3>
<p>
Date: 6/29/2016:
</p>
<ul><li>Increase VDD_1P8 current flow with soldered wire
</li></ul><h3 id="RevisionF2">Revision F</h3>
<p>
Date: 11/01/2016:
</p>
<ul><li>Increase VDD_1P8 trace width to remove need for wire from Revision E.1
</li></ul><h2 id="GW551x">GW551x</h2>
<h3 id="RevisionA.13">Revision A.1</h3>
<p>
Date: 01/08/2015
</p>
<ul><li>Initial release
</li></ul><h3 id="RevisionB4">Revision B</h3>
<p>
Date: 02/18/2015
</p>
<ul><li>Move passives further from mounting holes
</li><li>Increase spacing between the HDMI input and HDMI output connectors
</li><li>Reduce PORJ pullup resistor value for faster rise time
</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>)
</li><li>Fix USB OTG device mode (see <a class="wiki" href="/wiki/ventana/errata#hw10">Errata HW10</a>)
</li></ul><h3 id="RevisionC4">Revision C</h3>
<p>
Date: 10/06/2016:
</p>
<ul><li>Add series resistor between battery positive and reverse current diode for UL two level protection
</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)
</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>)
</li><li>Adjust processor drive on CPU crystal for increased lifespan
</li><li>Improve processor core voltage rails by adding on 22uF capacitor to both VDD_ARM and VDD_SOC and widening copper fills
</li></ul><h3 id="RevisionC.11">Revision C.1</h3>
<p>
Date: 02/10/2017:
</p>
<ul><li>Fix HS/CLK on HDMI Input
</li></ul><h3 id="RevisionD5">Revision D</h3>
<p>
Date: 03/02/2017:
</p>
<ul><li>Fix YUV422 semi-planar HDMI input to support 1080p60
</li></ul><h2 id="GW552x">GW552x</h2>
<h3 id="RevisionA.2">Revision A.2</h3>
<p>
Date: 11/19/2014
</p>
<ul><li>Initial release
</li></ul><h3 id="RevisionB5">Revision B</h3>
<p>
Date: 07/29/2015
</p>
<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>)
</li><li>Add 3.3V voltage translator to 2.5V PCISKTx_RSTJ signals for increased voltage margin
</li><li>Move watchdog timer from WDOG2_B to WDOG1_B for mainstream Linux support
</li><li>Add 32.768KHz crystal to processor real time clock for increased watchdog timer and Linux time of day accuracy
</li><li>move barrel jack to the opposite side of the power supply to eliminate interface between HDMI and barrel jack mating connectors
</li><li>add software controllable USB switch to configure one of the panel USB ports for either host or device
</li></ul><h3 id="RevisionC5">Revision C</h3>
<p>
Date: 03/29/2016
</p>
<ul><li>Reduce PORJ pullup resistor value for faster rise time
</li><li>Add series resistor between battery positive and reverse current diode for UL two level protection
</li><li>Adjust processor drive on CPU crystal for increased lifespan
</li><li>Improve processor core voltage rails by adding on 22uF capacitor to both VDD_ARM and VDD_SOC and widening copper fills
</li><li>Add processor external watchdog support by connecting WDOG_B to PMIC PWRON input
</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>)
</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>))
</li><li>Add resistor load option for I2C support via J8 ((I2C3: J8.17:SCL, J8.18:SDA))
</li><li>Move battery to reduce heat impact on it's lifespan
</li><li>Replace J8 10pin connector with 20pin connector
</li></ul><h3 id="RevisionC.12">Revision C.1</h3>
<p>
Date: 10/18/2016
</p>
<ul><li>Replace J8 20pin connector with 10pin connector (20pin connector available as option)
</li></ul><h2 id="GW553x">GW553x</h2>
<h3 id="RevisionB6">Revision B</h3>
<p>
Date: 08/30/2016
</p>
<ul><li>Add processor external watchdog support by connecting WDOG_B to PMIC PWRON input
</li><li>Replace 2-pin connector with reset switch for standard product (2-pin connector is optional)
</li><li>Replace 2-pin connector with user LED (2-pin connector is optional)
</li></ul><h1 id="LagunaFamily">Laguna Family</h1>
<h2 id="GW2388">GW2388</h2>
<p>
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.
</p>
<p>
Please contact support
</p>
<h1 id="OtherSBCFamilies">Other SBC Families</h1>
<p>
Please contact support
</p>

}}}