AMD Geode™ SC3200 Processor Data Book
251
Core Logic Module - SMI Status and ACPI Registers - Function 1
32581C
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 (I/O Offset 0Ch[0] = 1).
The SCIs enabled in this register are globally enabled by setting I/O Offset 0Ch[0] to 1. The status of the SCIs is reported in
I/O Offset 10h.
15:12
Reserved.
11
Reserved.
10
GPWIO2_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 I/O Offset 15h[6] to force an SMI.
9
GPWIO1_EN.
Allow GPWIO1 to generate an SCI.
0: Disable.
1: Enable.
See I/O Offset 07h[3] for debounce information.
The setting of this bit can be overridden via I/O Offset 15h[5] to force an SMI.
8
GPWIO0_EN.
Allow GPWIO0 to generate an SCI.
0: Disable.
1: Enable.
See I/O Offset 07h[3] for debounce information.
The setting of this bit can be overridden via I/O Offset 15h[4] to force an SMI.
7
Reserved.
Must be set to 0
6
USB_EN.
Allow USB events to generate a SCI.
0: Disable.
1: Enable
5
THRM_EN.
Allow THRM# to generate an SCI.
0: Disable.
1: Enable
4
SMI_EN.
Allow SMI events to generate an SCI.
0: Disable.
1: Enable
3
GPIO_EN.
Allow GPIOs (GPIO47-GPIO32 and GPIO15-GPIO0) to
generate an SCI.
0: Disable.
1: Enable.
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.
0
PWR_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)
Table 6-34. I/O Offset: ACPI Support Registers (Continued)
Bit
Description
Summary of Contents for Geode SC3200
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Page 16: ...16 AMD Geode SC3200 Processor Data Book Overview 32581C...
Page 24: ...24 AMD Geode SC3200 Processor Data Book Architecture Overview 32581C...
Page 350: ...350 AMD Geode SC3200 Processor Data Book Debugging and Monitoring 32581C...
Page 420: ...420 AMD Geode SC3200 Processor Data Book Electrical Specifications 32581C...