mm9z1-638: PCR_SR register question
12-07-2023
03:04 AM
755 次查看
Dear Sir:
We have a question about the booting reason after coming up from the stop mode. The value of the reset reason register is 0x0908, according to the PCR_SR register description, showing the HVRF and WLPMF waking up. While we can understand the WLPMF wake-up reason, why is the HVRF wake-up reason set? Is this normal?
2 回复数
12-11-2023
12:20 AM
723 次查看
Hi Gumu,
The 0x0908 makes sense and is expected!
The PCR register latches all conditions since last clearing of bits:
- device did wakeup based on PTB4 (WLPMF and WUPTB4F)
- device saw low voltage condition on VDDH (voltage of D2D Interface). VDDH is turned off during STOP mode.
W.
