SC1200UFH-266 AMD (ADVANCED MICRO DEVICES), SC1200UFH-266 Datasheet - Page 194

• Manufacturer Part Number: SC1200UFH-266
• Manufacturer: AMD (ADVANCED MICRO DEVICES)

Specifications of SC1200UFH-266

• Operating Temperature (min): 0C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Lead Free Status / Rohs Status: Not Compliant

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Index 43h
Index 44h
Table 6-29. F0: PCI Header/Bridge Configuration Registers for GPIO and LPC Support (Continued)
Bit
7:6
6:4
1
0
5
4
0
7
3
3
2
1
Description
Power Management Configuration Trap. If this bit is set to 1 and an access occurs to one of the configuration registers in
PCI Function 1 (F1) register space, an SMI is generated. Writes are trapped; access to the register is denied. Reads are
snooped; access to the register is allowed.
0: Disable.
1: Enable.
Top level SMI status is reported at F1BAR0+I/O Offset 00h/02h[9].
Second level SMI status is reported at F1BAR0+I/O Offset 04h/06h[5].
Legacy Configuration Trap. If this bit is set to 1 and an access occurs to one of the configuration registers in PCI Function
0 (F0), an SMI is generated. Reads and writes are snooped; access to the register is allowed.
0: Disable.
1: Enable.
Top level SMI status is reported at F1BAR0+I/O Offset 00h/02h[9].
Second level SMI status is reported at F1BAR0+I/O Offset 04h/06h[5].
Reserved. Must be set to 0.
Reserved. Must be set to 1.
Enable PCI Delayed Transactions for Access to I/O Address 170h-177h (Secondary IDE Channel). PIO mode uses
repeated I/O transactions that are faster when non-delayed transactions are used.
0: I/O addresses complete as fast as possible on PCI. (Default)
1: Accesses to Secondary IDE channel I/O addresses are delayed transactions on PCI.
For best performance of VIP, this bit should be set to 1 unless PIO mode 3 or 4 are used.
Enable PCI Delayed Transactions for Access to I/O Address 1F0h-1F7h (Primary IDE Channel). PIO mode uses
repeated I/O transactions that are faster when non-delayed transactions are used.
0: I/O addresses complete as fast as possible on PCI. (Default)
1: Accesses to Primary IDE channel I/O addresses are delayed transactions on PCI.
For best performance of VIP, this bit should be set to 1 unless PIO mode 3 or 4 are used.
Enable PCI Delayed Transactions for AT Legacy PIC I/O Addresses. Some PIC status reads are long. Enabling delayed
transactions help reduce DMA latency for high bandwidth devices like VIP.
0: PIC I/O addresses complete as fast as possible on PCI. (Default)
1: Accesses to PIC I/O addresses are delayed transactions on PCI.
For best performance of VIP, this bit should be set to 1.
Enable PCI Delayed Transactions for AT Legacy PIT I/O Addresses. Some x86 programs (certain benchmarks/diagnos-
tics) assume a particular latency for PIT accesses; this bit allows that code to work.
0: PIT I/O addresses complete as fast as possible on PCI.
1: Accesses to PIT I/O addresses are delayed transactions on PCI. (Default)
For best performance (e.g., when running Microsoft
Reserved. Must be set to 0.
AC97 Soft Reset. Active low reset for the AC97 codec interface.
0: AC97_RST# is driven high. (Default)
1: AC97_RST# is driven low.
Reserved. Must be set to 0.
IDE Controller Reset. Reset the IDE controller.
0: Disable.
1: Enable.
Write 0 to clear. This bit is level-sensitive and must be cleared after the reset is enabled.
32579B
Delayed Transactions Register (R/W)
Reset Control Register (R/W)
Reserved
®
Core Logic Module - Bridge, GPIO, and LPC Registers - Function 0
Windows
®
), this bit should be set to 0.
AMD Geode™ SC1200/SC1201 Processor Data Book
Reset Value: 00h
Reset Value: 02h
Reset Value: 01h