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AMD Geode™ SC1200/SC1201 Processor Data Book 221
Core Logic Module - Bridge, GPIO, and LPC Registers - Function 0
32579B
4 User Defined Device Idle Timer 1 (UDEF1) SMI Status. Indicates whether or not an SMI was caused by expiration of User
Defined Device 1 (UDEF1) Idle Timer Count Register (F0 Index A0h).
0: No.
1: Yes.
To enable SMI generation, set F0 Index 81h[4] = 1.
3 Keyboard/Mouse Idle Timer SMI Status. Indicates whether or not an SMI was caused by expiration of Keyboard/ Mouse
Idle Timer Count Register (F0 Index 9Eh).
0: No.
1: Yes.
To enable SMI generation, set F0 Index 81h[3] = 1.
2 Parallel/Serial Idle Timer SMI Status. Indicates whether or not an SMI was caused by expiration of Parallel/Serial Port Idle
Timer Count Register (F0 Index 9Ch).
0: No.
1: Yes.
To enable SMI generation, set F0 Index 81h[2] = 1.
1 Floppy Disk Idle Timer SMI Status. Indicates whether or not an SMI was caused by expiration of Floppy Disk Idle Timer
Count Register (F0 Index 9Ah).
0: No.
1: Yes.
To enable SMI generation, set F0 Index 81h[1] = 1.
0 Hard Disk Idle Timer SMI Status. Indicates whether or not an SMI was caused by expiration of Hard Disk Idle Timer Count
Register (F0 Index 98h).
0: No.
1: Yes.
To enable SMI generation, set F0 Index 81h[0] = 1.
Index F6h Second Level PME/SMI Status Register 3 (RC) Reset Value: 00h
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.
A read-only “Mirror” version of this register exists at F0 Index 86h. If the value of the register must be read without clearing the SMI
source (and consequently de-asserting SMI), F0 Index 86h can be read instead.
7 Video Access Trap SMI Status. Indicates whether or not an SMI was caused by a trapped I/O access to the Video I/O Trap.
0: No.
1: Yes.
To enable SMI generation, set F0 Index 82h[7] = 1.
6 Reserved. Reads as 0.
5 Secondary Hard Disk Access Trap SMI Status. Indicates whether or not an SMI was caused by a trapped I/O access to
the secondary hard disk.
0: No.
1: Yes.
To enable SMI generation, set F0 Index 83h[6] = 1.
4 Secondary Hard Disk Idle Timer SMI Status. Indicates whether or not an SMI was caused by expiration of Secondary
Hard Disk Idle Timer Count register (F0 Index ACh).
0: No.
1: Yes.
To enable SMI generation, set F0 Index 83h[7] = 1.
Table 6-29. F0: PCI Header/Bridge Configuration Registers for GPIO and LPC Support (Continued)
Bit Description