Details:

The MCU_BOOTMODE[09:08] pins can be used to configure the Power-on-Selftest (POST) mode of operation. The effect of the MCU_BOOTMODE[09:08] depends on the TI factory setting for internal efuse override control. The options defined in the TRM are:

The recommended MCU_BOOTMODE[09:08] settings depends on the Device Type, as summarized in the Workaround section.

The Device Type is identified by the part number Y/Device Type designator, which is described in the SoC Data Manual chapter 10. This is illustrated in the following diagram:

Workaround(s):

For Device Type = C, 5, D

• MCU_BOOTMODE[09:08] pins are “don’t care” – overridden by efuse
• Factory efuse post_enable = 1
  • The SoC will run the POST sequence for “DMSC LBIST and MCU LBIST in parallel followed by PBIST” with a run-time of approximately 20 ms.
• TI recommends MCU_BOOTMODE[09:08] be set to ‘01’ to ensure compatibility with future devices.

For Device Type = G, 0

• MCU_BOOTMODE[09:08] must be set to ‘11’ for “POST Bypass”.