CS5535 Datasheet, PDF (500/555 Pages) National Semiconductor (TI) – Geode™ CS5535 I/O Companion Multi-Function South Bridge

PMC Register Descriptions (Continued)
PM_SSC Bit Descriptions (Continued)
Bit Name
Description
15:13
12
11
10
9
8
7
6
5
4
3
2
1
0
RSVD
BADPACK_
RST_FLAG
GLCP_SFT_
RST_FLAG
WATCHDOG_
RST_FLAG
SHTDWN_RST_
FLAG
SFT_RST_
FLAG
RSVD
HRD_RST_FLAG
LOWBAT_FLAG
THRM_FLAG
PWRBTN_FLAG
LVD_FLAG
NORM_FLAG
OFF_FLAG
Reserved. Reads return 0; writes are don’t care.
Bad Packet Reset Flag. If set, indicates that the last Standby state was entered from
bad packet type reset. Returns to Working state when Abnormal Work Delay expires.
(Note 1)
GLCP Soft Reset Flag. If set, indicates that the last Standby state was entered from a
GLCP soft reset. Returns to Working State when Abnormal Work Delay expires. (Note
1)
Watchdog Reset Flag. If set, indicates that the last Standby state was entered from a
Watchdog reset. Returns to Working state when Abnormal Work Delay expires. (Note
1)
Shutdown Reset Flag. If set, indicates that the last Standby state was entered from
shutdown reset. Returns to Working state when Abnormal Work Delay expires. (Note 1)
Soft Reset Flag. If set, indicates that the last Standby state was entered from a soft-
ware reset. Returns to Working state when Abnormal Work Delay expires. (Note 1)
Reserved. Reads return 0; writes are don’t care.
Hard Reset Flag. If set, indicates that the last Standby state was entered due to the
unexpected assertion of Working reset. Returns to Working state when hard reset is
de-asserted and Abnormal Work Delay expires. (Note 1)
Low Battery Flag. If set, indicates that the last Standby state was entered due to a low
power shutdown. Returns to Working state due to default wakeup. (Note 1)
Thermal Flag. If set, indicates that the last Standby state was entered due to a thermal
shutdown. Returns to Working state due to default wakeup. (Note 1)
Power Button Flag. If set, indicates that the last Standby state was entered via a fail-
safe power off sequence. User held down the power button. PM1_CNT was not used.
Returns to Working state due to default wakeup. (Note 1)
Working Power Fail. If set, indicates that the last Standby state was entered via an
unexpected loss of Working power as detected with the on-chip Low Voltage Detect cir-
cuit. Returns to Working state due to default wakeup. (Note 1)
Normal Flag. If set, indicates that the last Standby state was entered under program
control through use of PM1_CNT. Returns to Working state due to programmed
wakeup. See PM1_STS (ACPI I/O Offset 00h) and PM_GPE0_STS (ACPI I/O Offset
18h) for wakeup source. (Note 1)
Off Flag (No Previous). If set, indicates that the circuits of the Standby power domain
have been reset. Entry was from the Power Off state. Returns to Working state due to
default wakeup. (Note 1)
Note 1. Standby Status. These bits are cleared each time the Power Management Logic enters the Standby state except
for the bit that caused the entry. Write 1 to the bit to clear the bit; writing 0 has no effect. Bits [12:8,6] do not result
in WORKING or WORK_AUX being de-asserted.
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