Hi there,
I'm working with RM46 and TPS65381.
It seems, that I'm missing something, because TPS65381 always ends up in SAVE mode directly after a power up reset.
Here's what's going on:
- powering my pcb
- TPS65381 releases RM46 (nRES)
- RM46 begins to work (self checks)
- after ca. 22ms I'm reading a lot of registers via SPI:
- SAFETY_STAT_3 reg -> 0x00 -> everything seems fine
- SAFETY_STAT_5 -> 0x04 -> SAVE mode (!!!!!)
- SAFETY_ERR_STAT -> 0x01
- SAFETY_ERR_CFG -> 0x00
- SAFETY_FUNC_CFG -> 0x85
- VMON_STAT_1 -> 0x00
- VMON_STAT_2 -> 0x00
- SAFETY_STAT_1 -> 0x00
- SAFETY_STAT_2 -> 0x07
- SAFETY_STAT_3 -> 0x00
- SAFETY_STAT_4 -> 0x00
At that time (ca. 22ms after release of nRES) TPS65381 already seems to be in SAVE mode,
although I expect it to be in DIAGNOSTIC mode...!
At the moment I have no idea for that behaviour. Do you have a hint for me?
Regards, Andy