AMD manual AMD Geode SC3200 Processor Data Book 251

Models: SC3200

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Core Logic Module - SMI Status and ACPI Registers - Function 1

32581C

Table 6-34. F1BAR1+I/O Offset: ACPI Support Registers (Continued)

Bit

Description

Offset 12h-13h

GPE0_EN — General Purpose Event 0 Enable Register (R/W)

Reset Value: 0000h

In order for the ACPI events described below to generate an SCI, the SCI_EN bit must also be set (F1BAR1+I/O Offset 0Ch[0] = 1).

The SCIs enabled in this register are globally enabled by setting F1BAR1+I/O Offset 0Ch[0] to 1. The status of the SCIs is reported in F1BAR1+I/O Offset 10h.

15:12 Reserved.

11Reserved.

10GPWIO2_EN. Allow GPWIO2 to generate an SCI.

0:Disable.

1:Enable.

A fixed high-to-low or low-to-high transition (debounce period) of 31 µs exists in order for GPWIO2 to be recognized. The setting of this bit can be overridden via F1BAR1+I/O Offset 15h[6] to force an SMI.

9GPWIO1_EN. Allow GPWIO1 to generate an SCI.

0:Disable.

1:Enable.

See F1BAR1+I/O Offset 07h[3] for debounce information.

The setting of this bit can be overridden via F1BAR1+I/O Offset 15h[5] to force an SMI.

8GPWIO0_EN. Allow GPWIO0 to generate an SCI.

0:Disable.

1:Enable.

 

See F1BAR1+I/O Offset 07h[3] for debounce information.

 

The setting of this bit can be overridden via F1BAR1+I/O Offset 15h[4] to force an SMI.

7

Reserved. Must be set to 0

6USB_EN. Allow USB events to generate a SCI.

0:Disable.

1:Enable

5THRM_EN. Allow THRM# to generate an SCI.

0:Disable.

1:Enable

4SMI_EN. Allow SMI events to generate an SCI.

0:Disable.

1:Enable

3GPIO_EN. Allow GPIOs (GPIO47-GPIO32 and GPIO15-GPIO0) to generate an SCI.

0:Disable.

1:Enable.

 

F0BAR0+I/O Offset 08h/18h selects which GPIOs are enabled for PME generation. This bit (GPIO_EN) globally enables

 

those selected GPIOs for generation of an SCI.

2:1

Reserved. Must be set to 0.

0PWR_U_REQ_EN. Allow power-up request events from the SuperI/O module to generate an SCI.

0:Disable.

1:Enable.

A power-up request event is defined as any of the following events/activities: Modem, Telephone, Keyboard, Mouse, CEIR (Consumer Electronic Infrared)

AMD Geode™ SC3200 Processor Data Book

251

Page 251
Image 251
AMD manual AMD Geode SC3200 Processor Data Book 251