SC2200 NSC [National Semiconductor], SC2200 Datasheet - Page 230
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SC2200
Manufacturer Part Number
SC2200
Description
Thin Client On a Chip
Manufacturer
NSC [National Semiconductor]
Datasheet
1.SC2200.pdf
(433 pages)
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Core Logic Module
Table 5-29. F0: PCI Header and Bridge Configuration Registers for GPIO and LPC Support (Continued)
Index F7h
The bits in this register contain second level status reporting. Top level status is reported in F1BAR0+I/O Offset 00h/02h[0].
Reading this register clears the status at both the second and top levels except for bit 7 which has a third level of status reporting at
F0BAR0+I/O 0Ch/1Ch.
A read-only “Mirror” version of this register exists at F0 Index 87h. If the value of the register must be read without clearing the SMI
source (and consequently deasserting SMI), F0 Index 87h can be read instead.
Index F8h-FFh
5:4
Bit
7
6
3
2
1
0
Description
GPIO Event SMI Status (Read Only, Read does not Clear). Indicates whether or not an SMI was caused by a transition of
any of the GPIOs (GPIO47-GPIO32 and GPIO15-GPIO0).
0: No.
1: Yes.
To enable SMI generation, set F1BAR1+I/O Offset 0Ch[0] = 0.
F0BAR0+I/O Offset 08h/18h selects which GPIOs are enabled to generate a PME and setting F1BAR1+I/O Offset 0Ch[0] =
0 enables the PME to generate an SMI. In addition, the selected GPIO must be enabled as an input (F0BAR0+I/O Offset
20h and 24h).
The next level (third level) of SMI status is at F0BAR0+I/O 0Ch/1Ch.
Thermal Override SMI Status. Indicates whether or not an SMI was caused by an assertion of the THRM#.
0: No.
1: Yes.
To enable SMI generation set F0 Index 83h[4] = 1.
Reserved. Read as 0.
SIO PWUREQ SMI Status. Indicates whether or not an SMI was caused by a power-up event from the SIO.
0: No.
1: Yes.
A power-up event is defined as any of the following events/activities:
To enable SMI generation, set F1BAR1+I/O Offset 0Ch[0] = 0.
Codec SDATA_IN SMI Status. Indicates whether or not an SMI was caused by AC97 Codec producing a positive edge on
SDATA_IN.
0: No.
1: Yes.
To enable SMI generation, set F0 Index 80h[5] = 1.
RTC Alarm (IRQ8#) SMI Status. Indicates whether or not an SMI was caused by an RTC interrupt.
0: No.
1: Yes.
This SMI event can only occur while in 3V Suspend and an RTC interrupt occurs and F1BAR1+I/O Offset 0Ch[0] = 0.
ACPI Timer SMI Status. Indicates whether or not an SMI was caused by an ACPI Timer (F1BAR0+I/O Offset 1Ch or
F1BAR1+I/O Offset 1Ch) MSB toggle.
0: No.
1: Yes.
To enable SMI generation, set F0 Index 83h[5] = 1.
— RI2#
— SDATA_IN2
— IRRX1 (CEIR)
(Continued)
Second Level PME/SMI Status Register 4 (RC)
Reserved
230
Reset Value: 00h
Reset Value: 00h
Revision 3.0
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