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

32579B

 

 

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

 

Bit

Description

 

 

 

 

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.

 

 

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.

 

 

 

 

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)

 

 

 

 

 

Offset 14h

 

GPWIO Control Register 1 (R/W)

Reset Value: 00h

 

 

 

7:4

Reserved. Must be set to 0.

 

 

 

 

3

Reserved.

 

 

 

 

2

GPWIO2_POL. Select GPWIO2 polarity.

 

 

0:

Active high

 

 

1:

Active low

 

 

 

 

1

GPWIO1_POL. Select GPWIO1 polarity.

 

 

0:

Active high

 

 

1:

Active low

 

 

 

 

0

GPWIO0_POL. Select GPWIO0 polarity.

 

 

0:

Active high

 

 

1:

Active low

 

 

 

 

 

Offset 15h

 

GPWIO Control Register 2 (R/W)

Reset Value: 00h

 

 

 

7

Reserved.

 

 

 

 

6

GPWIO_SMIEN2. Allow GPWIO2 to generate an SMI.

 

 

0:

Disable. (Default)

 

 

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.

 

Bit 2 of this register must be set to 0 (input) for GPWIO2 to be able to generate an SMI.

 

 

If asserted, this bit overrides the setting of F1BAR1+I/O Offset 12h[10] and its status is reported in F1BAR0+I/O Offset 00h/

 

02h[0].

 

 

 

 

 

AMD Geode™ SC1200/SC1201 Processor Data Book

253

Page 253
Image 253
AMD SC1201, SC1200 manual Consumer Electronic Infrared, Gpwio Control Register 1 R/W Reset Value 00h, 02h0