| | 289 | |
| | 290 | |
| | 291 | [=#VN12] |
| | 292 | == VN12 New DRAM Chip Revision Requires Bootloader and JTAG Software Update |
| | 293 | |
| | 294 | Issue: |
| | 295 | * The 4GB MT53E1G32D2FW-046 AIT:B (RevB) DRAM is EOL and replaced by the MT53E1G32D2FW-046 AIT:C (RevC) |
| | 296 | * The revC part moves to a single die (doubling the density per ch/cs going from 2cs to 1cs and increasing the rows from 16 to 17) which is a different DRAM topology. |
| | 297 | * The Gateworks bootloader and JTAG software need to be updated to the new DRAM configuration |
| | 298 | * An error message in the bootloader of 'Training FAILED' will appear with older bootloaders on boards with the new DRAM and the board will hang at this point |
| | 299 | * A fDR error will be shown in the output of jtag_usbv4 when trying to flash a board with the new memory |
| | 300 | |
| | 301 | Resolution: |
| | 302 | * Update to the latest Gateworks bootloader (https://dev.gateworks.com/venice/images/) or backport the patch if using an older u-boot: |
| | 303 | - [https://github.com/Gateworks/uboot-venice/commit/d4a80d8db08c2dfbc278a74e1340105e1013490f venice: lpddr4_timing_imx8mp: add 4gb single die support] |
| | 304 | - [https://github.com/Gateworks/uboot-venice/commit/09150eb618c7571d2b99068b7c79e8785f457a30 venice: lpddr4_timing_imx8mm: add 4gb single die support] |
| | 305 | * Update to latest jtag_usbv4: https://dev.gateworks.com/jtag/ |
| | 306 | |
| | 307 | Affected Products: |
| | 308 | * any 4GiB venice product manufactured from 2026 onward |
