PC87413 datasheet(207/257 Pages) NSC

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9.0 System Wake-Up Control (SWC) (Continued)

Revision 1.2

207

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9.4.5

PM1 Enable High Register (PM1b_EN_HIGH)

This register contains the eight high bits of the PM1_EN register. The PC8741x devices contain the block ‘b’ instance of the

PM1_EN register. This register belongs to the PM1 Event Group of the ACPI fixed-feature space registers.

PM1_EN register bits that are specified by the ACPI but not implemented in the PC8741x devices have a ‘0’ value. All the imple-

mented enable bits behave according to the Enable Bit definition (the bit is read/write by software) in the ACPI Specification.

Power Well:VSB

Location: Offset 03h

Type:

R/W

Bit

76543210

Name

Reserved

RTC_EN

SLPBTN

_EN

PWRBTN

_EN

Reset

00000000

Bit

Description

7-3

Reserved.

RTC_EN (RTC Event Enable). Enables the RTC alarm to generate a power management interrupt (SIOSCI).

This bit is forced to ‘0’ when the RTC_EV_DIS bit in the ACPI_CFG register is reset to ‘0’, disabling any RTC

alarm event.

0: Disable SCI (default)

1: Enable SCI from RTC alarm

SLPBTN_EN (Sleep Button Event Enable). Enables Sleep button pressing to generate a power management

interrupt (SIOSCI). This bit is forced to ‘0’ when the SLPBTN_EV_DIS bit in the ACPI_CFG register is reset to

‘0’, disabling any Sleep button event.

0: Disable SCI (default)

1: Enable SCI from Sleep button pressing

PWRBTN_EN (Power Button Event Enable). Enables Power button pressing to generate a power management

interrupt (SIOSCI) when the system is in the active state (S0). This bit does not inﬂuence SCI generation when

the system is in a sleep state (S1-S5). This bit is forced to ‘0’ when the PWRBTN_EV_DIS bit in the ACPI_CFG

0: Disable SCI (default)

1: Enable SCI from Power button pressing

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