2 reset status register (rstat), Reset status register (rstat) – Kontron AM4024e User Manual
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User Guide
AM4024(E)
3.3.2 Reset Status Register (RSTAT)
The Reset Status Register is used to determine the host’s reset source.
Note:
The Reset Status Register is set to default values by power-on (cold) reset, not by a warm
reset.
Table 26: Reset Status Register (RSTAT)
ADDRESS
0x285
BIT
7
6
5
4
3
2
1
0
NAME
PORS
Reserved
SRST
Reserved
IPRS
Reserved
Reserved
WTRS
ACCESS
R/W
R
R/W
R
R/W
R
R
R/W
RESET
N/A
0
0
0
0
0
0
0
BITFIELD
DESCRIPTION
7
PORS
Power-on reset status:
0 = System reset generated by warm reset
1 = System reset generated by power-on (cold) reset
Writing a ’1’ to this bit clears the bit.
5
SRST
Software reset status:
0 = Reset is logged by the MMC
1 = Reset is not logged by MMC
The uEFI BIOS / software sets this bit to inform the MMC that the next reset should not be
logged.
3
IPRS
MMC reset status:
0 = System reset not generated by MMC
1 = System reset generated by MMC
Writing a ’1’ to this bit clears the bit.
0
WTRS
Watchdog timer reset status:
0 = System reset generated by Watchdog timer
1 = System reset generated by Watchdog timer
Writing a ’1’ to this bit clears the bit.