3.2.2 Firmware Initialization
The following figure illustrates the detailed firmware initialization flow as part of the system initialization.
The firmware initially checks if the EEPROM content is valid by reading from the EEPROM variable eepConfValid.confVal.
| Address | Name | Bit 7 | Bit 6 | Bit 5 | Bit 4 | Bit 3 | Bit 2 | Bit 1 | Bit 0 |
|---|---|---|---|---|---|---|---|---|---|
| 0x0009 | confVal | — | — | — | — | — | — | NVAL[1:0] | |
If parameter NVAL[1:0] is unequal to 0b10, the EEPROM content is considered invalid. The firmware uses the default I/O and SPI configuration, and exits the firmware initialization with the status failed.
If the EEPROM content is valid, the firmware proceeds with the system initialization according to the EEPROM settings. See Initial I/O Port Configuration to System Ready Event Setting from Related Links