FDC37C932APM View Datasheet(PDF) - SMSC -> Microchip

Part Name

Description

Manufacturer

FDC37C932APM

Plug and Play Compatible Ultra I/O™ Controller with Soft Power Management

SMSC -> Microchip 

Table 106 - Auxilliary I/O, Logical Device 8 [Logical Device Number = 0x08]

NAME

REG INDEX

DEFINITION

STATE

GP16

0xE6 General Purpose I/0 bit 1.6

C

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

Default = 0x01

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

on VTR POR

Bit[2] Int En

=1 Enable Combined IRQ

=0 Disable Combined IRQ

Bit[4:3] Alt Func: Joystick (Active Low)

=01 Joystick RD Strobe function

=10 Joystick CS function

=00 Select basic I/O function

Bit[7:5] Reserved = 000

GP17

Default = 0x01

on VTR POR

0xE7 General Purpose I/0 bit 1.7

C

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

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

Bit[2] Int En

=1 Enable Combined IRQ

=0 Disable Combined IRQ

Bit[3] Alt Function: Joystick Write Strobe (Active

Low)

=1 Select alternate function

=0 Select basic I/O function

Bit[7:4] Reserved = 0000

GP20

Default = 0x01

on VTR POR

0xE8 General Purpose I/0 bit 2.0

C

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

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

Bit[2] Int En =1 Enable Combined IRQ

=0 Disable Combined IRQ

Bit[3] Alt Func: IDE2 buffer enable (Active Low)

=1 Select alternate function

=0 Select basic I/O function

Bit[4] Alt function: 8042 P20, Typically used to

generate a "Keyboard Reset" used by systems in

order to switch from "protected mode" back to "real

mode"

=1 Select alternate function

=0 Select basic I/O function

Bit[7:5] Reserved = 000

Note: Bit[3] and Bit[4] should not both be set at the

same time

231

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