AWR6843AOP: SOC_softReset and Errata MSS#41

AWR6843AOP Errata Documents 

MSS#41 Issuing WARM_RESET can Cause Bootloader Failure Which Results in Failure to Load the Application From Serial Flash

Revision(s) Affected: AWR6843AOP ES2.0

Description: WARM_RESET issued by application software (via register write), internal watchdog
trigger, or external pin invocation can cause bootloader failure. This results in failure to
load the application from serial flash
1. Occurrence of WARM_RESET resets all configuration registers to default pre boot
ROM values.
2. Change in register values can affect settings of APLL clock, resulting in the PLL clock
leaking into digital subsystems of device. This can create an invalid state of a specific
clock divider in the PLL clock domain which is subsequently not initialized by the
WARM_RESET functionality.
3. Once this clock divider state is reached the subsequent bootloader execution hangs
while trying to read the QSPI serial flash for program load (the QSPI is dependent
upon the clock divider). This necessitates a power-cycle or nRESET for a successful
recovery.

Workaround(s): Avoid WARM_RESET. Use an external nRESET to initiate device reset with either an
external watchdog or PMIC initiated reset sequence.