CS5535 datasheet(481/555 Pages) NSC

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PMC Register Descriptions (Continued)

5.18.2.2

PM Enable 1 (PM1_EN)

PM1_EN is the Enable register for Timer Carry, Button, and RTC Alarm wakeup events. All bits in this register are cleared

by the Standby state except bits 10 and 8. They maintain their state through Standby. All bits in this register return the value

written when read, except for the Reserved bits.

If enabled, any of the SCIs cause a wakeup event if the system state is Sleep or Standby (except TMR and GBL).

5.18.2.3

PM Control 1 (PM1_CNT)

PM1_CNT is the Control register for global and the Sleep state settings.

ACPI I/O Offset

02h

Type

R/W

Reset Value

0100h

PM1_EN Register Map

5432

RSVD

RTC_

SLPBTN

_EN

PWRBTN

_EN

RSVD

GLB_

RSVD

TMR_

PM1_EN Bit Descriptions

Bit

Name

Description

15:11

RSVD

Reserved. By convention write 0, but other values are “don’t care”. Reads return 0

value.

RTC_EN

Real-Time Clock SCI Enable. Enables generating an SCI when RTC_FLAG (ACPI I/O

Offset 00h[10]) gets set. Also enables wakeup from this event. 0: Disable; 1: Enable.

SLPBTN_EN

Sleep Button SCI Enable. Enables generating an SCI when SLPBTN_FLAG (ACPI

I/O Offset 00h[9]) gets set. Also enables wakeup from this event. 0: Disable; 1: Enable.

PWRBTN_EN

Power Button SCI Enable. Enables generating an SCI when PWRBTN_FLAG (ACPI

I/O Offset 00h[8]) gets set. Also enables wakeup from this event. 0: Disable;

1: Enable (Default).

7:6

RSVD

Reserved. By convention write 0, but other values are “don’t care”. Reads return 0

value.

GLB_EN

Global Enable. Enables generating an SCI when GLB_FLAG (ACPI I/O Offset 00h[5])

gets set. There is no wakeup concept for this event. 0: Disable; 1: Enable.

4:1

RSVD

Reserved. By convention write 0, but other values are “don’t care”. Reads return 0

value.

0TMR_EN

Timer SCI Enable. Enables generating an SCI when TMR_FLAG (ACPI I/O Offset

00h[0]) gets set. There is no wakeup concept for this event 0: Disable; 1: Enable.

ACPI I/O Offset

08h

Type

R/W

Reset Value

0000h

PM1_CNT Register Map

RSVD

SLP_EN

SLP_TYPx

IGNORE

RSVD

GBL_

RLS

BM_

RLD

SCI_

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