LPC47M14X datasheet(135/205 Pages) SMSC

135 / 205 page

SMSC DS – LPC47M14X

Page 135

Rev. 03/19/2001

NAME

REG OFFSET

(hex)

DESCRIPTION

SMI_EN5

Default = 0x00

on VTR POR

(R/W)

SMI Enable Register 5

This register is used to enable the different interrupt

sources onto the group nSMI output.

1=Enable

0=Disable

Bit[0] GP54

Bit[1] GP55

Bit[2] GP56

Bit[3] GP57

Bit[4] Reserved

Bit[5] Reserved

Bit[6] FAN_TACH1

Bit[7] FAN_TACH2

N/A

(R)

Reserved – reads return 0

MSC_STS

Default = 0x00

on VTR POR

(R/W)

Miscellaneous Status Register

Bits[5:0] can be cleared by writing a 1 to their position

(writing a 0 has no effect).

Bit[0] Either Edge Triggered Interrupt Input 0 Status. This

bit is set when an edge occurs on the GP21 pin.

Bit[1] Either Edge Triggered Interrupt Input 1 Status. This

bit is set when an edge occurs on the GP22 pin.

Bit[2] Either Edge Triggered Interrupt Input 2 Status. This

bit is set when an edge occurs on the GP41 pin.

Bit[3] Either Edge Triggered Interrupt Input 3 Status. This

bit is set when an edge occurs on the GP43 pin.

Bit[4] Either Edge Triggered Interrupt Input 4 Status. This

bit is set when an edge occurs on the GP60 pin.

Bit[5] Either Edge Triggered Interrupt Input 5 Status. This

bit is set when an edge occurs on the GP61 pin.

Bit[7:6] Reserved. This bit always returns zero.

N/A

(R)

Reserved – reads return 0

Force Disk Change

Default = 0x01 on

VCC POR

(R/W)

Force Disk Change

Bit[0] Force Disk Change for FDC0

0=Inactive

1=Active

Bit[1] Force Disk Change for FDC1

0=Inactive

1=Active

Force Change 0 and 1 can be written to 1 but are not

clearable by software.

Force Change 0 is cleared on nSTEP and nDS0

Force Change 1 is cleared on nSTEP and nDS1

DSKCHG (FDC DIR Register, Bit 7) = (nDS0 AND Force

Change 0) OR (nDS1 AND Force Change 1) OR

nDSKCHG

Setting either of the Force Disk Change bits active ‘1’

forces the FDD nDSKCHG input active when the

appropriate drive has been selected.

Bit[7:2] Reserved

LPC47M14X Datasheet(PDF) 135 Page - SMSC Corporation

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