Wake Alarm Device Timer: DC (WADT_DC) – Offset 1804 - 001 - ID:834576 | Intel® 800 Series Chipset Family Platform Controller Hub (PCH), Volume 2

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Wake Alarm Device Timer: DC (WADT_DC) – Offset 1804

Bit Range	Default	Access	Field Name and Description
31:0	ffffffffh	RW/V	Wake Alarm Device Timer Value for DC Mode (WADT_DC_VAL) This field contains the 32-bit wake alarm device timer value (granularity 1s) for DC power. The timer begins decrementing when written to a value other than FFFFFFFFh (regardless of the power source when the write occurs). Upon counting down to 0: If on DC power, GPE0b_STS.WADT_STS will be set. This status bit being set will generate a host wake if GPE0b_EN.WADT_EN is 1. If the power source is AC at this time, the status bit is not set. However, if DC power subsequently returns to the platform, the DC Expired Timer begins running. See the WADT_EXP_DC register for details. The timer returns to its default value of FFFFFFFFh.

Bit Range

Default

Access

Field Name and Description

31:0

ffffffffh

RW/V

Wake Alarm Device Timer Value for DC Mode (WADT_DC_VAL)

This field contains the 32-bit wake alarm device timer value (granularity 1s) for DC power. The timer begins decrementing when written to a value other than FFFFFFFFh (regardless of the power source when the write occurs). Upon counting down to 0:

If on DC power, GPE0b_STS.WADT_STS will be set. This status bit being set will generate a host wake if GPE0b_EN.WADT_EN is 1.

If the power source is AC at this time, the status bit is not set. However, if DC power subsequently returns to the platform, the DC Expired Timer begins running. See the WADT_EXP_DC register for details.

The timer returns to its default value of FFFFFFFFh.

Wake Alarm Device Expired Timer: AC (WADT_EXP_AC)

Wake Alarm Device Timer: AC (WADT_AC) Wake Alarm Device Expired Timer: AC (WADT_EXP_AC)