Hello, Yixing and everybody, I'd like to ask if this statement from the reference manual of I.MX28 was correct:
"ENABLE_PIN_BOOT_CHECK
Blow to enable boot loader to first test the LCD_RS pin to determine if the pin
boot mode is enabled. If this bit is blown and LCD_RS is pulled high, then boot
mode is determined by the state of LCD_D[5:0] pins. If this bit is not blown, skip
testing the LCD_RS pin and go directly to determine the boot mode by reading
the state of LCD_D[5:0]." Is that not a tautology?
i.
All is correct : ENABLE_PIN_BOOT_CHECK fuse defines if LCD_RS pins should be tested in order to select what is source of boot
configuration: pins or fuses. From section 12.2.1 (Boot Pins Definition and Mode Selection) of the i.MX28 Reference Manual :
"If LCD_RS is pulled down, then the boot mode is determined by the OTP eFuse bits, as defined in Table 12-4."