PC87413 datasheet(187/257 Pages) NSC

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

Revision 1.2

187

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9.3.10

SWC Miscellaneous Control Register (SWC_CTL)

This register contains control and status bits for the SWC module. It is reset by hardware to 00h.

Power Well:VPP

Location: All Banks, Offset 08h

Type:

Varies per bit

Bit

43210

Name

SW_OFF

_CTL

SW_ON

_CTL

PWB_OVR

_STS

CROWBAR

_STS

Reserved

SWAP

_KBMS

Reset

00000

Bit

Type

Description

R/W

SW_OFF_CTL (Software Off Control). Writing ‘1’ to this bit sets the SW_OFF_STS bit in the

GPE1_STS_3 register (see Section 9.4.11 on page 211), which requests a VDD power off sequence.

This bit then returns to ‘0’ (read always returns ‘0’).

0: Inactive (default)

1: Requests a VDD power off sequence

R/W

SW_ON_CTL (Software On Control). Writing ‘1’ to this bit sets the SW_ON_STS bit in the

GPE1_STS_3 register (see Section 9.4.11 on page 211), which requests a VDD Power On sequence.

This bit then returns to ‘0’ (read always returns ‘0’). When the VDD power is off, this bit can be written

only through the ACCESS.bus (PC87413 and PC87417).

0: Inactive (default)

1: Requests a VDD Power On sequence

R/W1C PWB_OVR_STS (Power Button Override Status). Indicates that the Power Button Override event has

occurred (Power button pressed for more than 4 seconds). In this condition the VDD power is

unconditionally turned off. Writing ‘1’ clears this bit; writing ‘0’ is ignored.

0: Inactive (default)

1: Power Button Override event has occurred

R/W1C CROWBAR_STS (Crowbar Status). Indicates that the Crowbar event has been detected (VDD

remained Off for longer than the Crowbar Timeout). In this condition the VDD power is turned off. Writing

‘1’ clears this bit; writing ‘0’ is ignored.

0: Inactive (default)

1: Crowbar event has been detected

3-1

Reserved.

R/W

SWAP_KBMS (Swap Keyboard and Mouse Inputs). When this bit is set, the keyboard signals

(KBCLK and KBDAT) are swapped with the mouse signals (MCLK and MDAT). This bit must be set to

the same value as the Swap bit in the KBC Conﬁguration register (see Section 3.13.3 on page 69).

0: No swapping (default)

1: Swaps the keyboard and mouse signals

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