FDC37B78X View Datasheet(PDF) - SMSC -> Microchip

Part Name

Description

Manufacturer

FDC37B78X

Enhanced Super I/O Controller with ACPI Support, Real Time Clock and Consumer IR

SMSC -> Microchip 

DIGITAL INPUT REGISTER (DIR)

Address 3F7 READ ONLY

This register is read-only in all modes.

PC-AT Mode

7

6

5

4

3

2

1

0

DSK

CHG

RESET N/A N/A N/A N/A N/A N/A N/A N/A

COND.

BIT 0 - 6 UNDEFINED

The data bus outputs D0 - 6 will remain in a

high impedance state during a read of this

register.

BIT 7 DSKCHG

This bit monitors the pin of the same name and

reflects the opposite value seen on the disk

cable or the value programmed in the Force

Disk Change Register (see Configuration

Register LD8:CRC1[1:0]).

30

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