Difference between revisions of "i.MX51 SODIMM PC Boot device options"
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All the configuration signals are tied down to ground using external pull-down resistors. These resistors (R900 - R916) ensure that the default state is correctly initialized. More details can be found in datasheet shipped with the development kit:<br /> | All the configuration signals are tied down to ground using external pull-down resistors. These resistors (R900 - R916) ensure that the default state is correctly initialized. More details can be found in datasheet shipped with the development kit:<br /> | ||
| − | [[image:i.MX51 SODIMM PC-Development Kit-Boot options.jpg|800px]]<br /> | + | [[image:i.MX51 SODIMM PC-Development Kit-Boot options.jpg|800px]]<br /><br /> |
Boot configuration resistors can be located in [http://downloads.voipac.com/files/i.MX51_SODIMM_PC-Development_kit/module/documents/i.MX51_SODIMM_Module-Assembly_drawings.pdf the board assembly drawing].<br /><br /> | Boot configuration resistors can be located in [http://downloads.voipac.com/files/i.MX51_SODIMM_PC-Development_kit/module/documents/i.MX51_SODIMM_Module-Assembly_drawings.pdf the board assembly drawing].<br /><br /> | ||
Revision as of 20:08, 13 April 2021
Voipac i.MX51 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 booting options to be tested.
Modules support multiple booting options:
- NAND Flash
- microSD/MMC
- SPI Flash
- I2C EEPROM
All the configuration signals are tied down to ground using external pull-down resistors. These resistors (R900 - R916) ensure that the default state is correctly initialized. More details can be found in datasheet shipped with the development kit:
800px
Boot configuration resistors can be located in the board assembly drawing.
To be able to put pullups on boot configuration pins you have to lock e-fuses configuration by programming the e-fuses using barebox bootloader.
The procedure described below requires extra care as the faulty E-Fuses setup will cause a 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
Before programming E-Fuses, E-Fuse supply gate must be enabled:
barebox:/ md 0x73fd4064+4 73fd4064: 0000fe62 b... barebox:/ mw 0x73fd4064+4 0xfe72
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_iim0.permanent_write_enable=1 barebox:/ mw -b -d /dev/imx_iim_bank1 9+6 0x00 0x01 0x02 0x03 0x04 0x05 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 ................