LPC47M192 datasheet(154/228 Pages) SMSC

154 / 228 page

SMSC DS – LPC47M192

Page 154

Rev. 03/30/05

DATASHEET

NAME

REG OFFSET

(hex)

DESCRIPTION

GP16

Default = 0x01

on VTR POR

(R/W)

General Purpose I/0 bit 1.6

Bit[0] In/Out : =1 Input, =0 Output

Bit[1] Polarity : =1 Invert, =0 No Invert

Bit[2] Alternate Function Select

1= J2X (Joystick 2, X-Axis RC Constant)

0=GPIO

Bits[6:3] Reserved

Bit[7] Output Type Select

1=Open Drain

0=Push Pull

GP17

Default = 0x01

on VTR POR

(R/W)

General Purpose I/0 bit 1.7

Bit[0] In/Out : =1 Input, =0 Output

Bit[1] Polarity : =1 Invert, =0 No Invert

Bit[2] Alternate Function Select

1= J2Y (Joystick 2, Y-Axis RC Constant)

0=GPIO

Bits[6:3] Reserved

Bit[7] Output Type Select

1=Open Drain

0=Push Pull

GP20

Default = 0x01

on VTR POR

(R/W)

General Purpose I/0 bit 2.0

Bit[0] In/Out : =1 Input, =0 Output

Bit[1] Polarity : =1 Invert, =0 No Invert

Bit[2] Alternate Function Select

1=8042 P17 function

0=Basic GPIO function

Bits[6:3] Reserved

Bit[7] Output Type Select

1=Open Drain

0=Push Pull

GP21

Default =0x01

on VTR POR

(R/W)

General Purpose I/0 bit 2.1

Bit[0] In/Out : =1 Input, =0 Output

Bit[1] Polarity : =1 Invert, =0 No Invert

Bit[3:2] Alternate Function Select

11= nDS1 – Floppy Drive Select 1 (Note 4)

10=Either Edge Triggered Interrupt Input 0 (Note 1),

01=8042 P16 function (User Note 2)

00=Basic GPIO function

Bits[6:4] Reserved

Bit[7] Output Type Select

1=Open Drain

0=Push Pull

LPC47M192 Datasheet(PDF) 154 Page - SMSC Corporation

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