Difference between revisions of "i.MX25 SODIMM PC Boot device options"
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| − | All the configuration signals are tied to supply voltage using external pull-up resistors. These on-module resistors (R600 - R609) ensure that the default state is correctly initialized. More details can be found | + | All the configuration signals are tied to supply voltage using external pull-up resistors. These on-module resistors (R600 - R609) ensure that the default state is correctly initialized. More details can be found on page no. 6 of the schematic shipped with the development kit:<br /> |
[[image:i.MX25_SODIMM_PC-Development_Kit-Boot_options.jpg|800px]]<br /><br /> | [[image:i.MX25_SODIMM_PC-Development_Kit-Boot_options.jpg|800px]]<br /><br /> | ||
Revision as of 22:15, 29 April 2021
Voipac i.MX25 SODIMM PC - Development kit is delivered with E-Fuses left intact by default, not programmed. Booting can be selected from various devices thus allowing all the possible options to be tested.
Modules support multiple booting options:
- NAND Flash
- microSD/MMC
- SPI Flash
- I2C EEPROM
All the configuration signals are tied to supply voltage using external pull-up resistors. These on-module resistors (R600 - R609) ensure that the default state is correctly initialized. More details can be found on page no. 6 of the schematic shipped with the development kit:
800px
Boot configuration resistors can be located in the board assembly drawing.
The procedure described below requires extra care as the faulty E-Fuses will cause permanent module malfunction.
BE AWARE THAT E-FUSES PROGRAMMING IS NON REVERSAL PROCESS! WARRANTY CLAIM CAUSED BY IMPROPER E-FUSES PROGRAMMING WILL NOT BE ACCEPTED!
Programming E-Fuses
Dumping factory E-Fuses configuration before programming:
barebox:/ md -b -s /dev/imx_iim_bank0 00000000: 10 10 00 00 01 00 00 02 2b 2b 80 00 02 d9 f4 b1 ........++...... 00000010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
Writing E-Fuses (example set also MAC address 00:01:02:03:04:05):
barebox:/ imx_iim_bank0.permanent_write_enable=1 barebox:/ mw -b -d /dev/imx_iim_bank0 0x1a+6 0 1 2 3 4 5 barebox:/ md -b -s /dev/imx_iim_bank0 00000000: 10 10 00 00 01 00 00 02 2b 2b 80 00 02 d9 f4 b1 ........++...... 00000010: 00 00 00 00 00 00 00 00 00 00 00 01 02 03 04 05 ................
More information about E-Fuse bank layout can be found in the official NXP documentation.