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 

Model 30 Mode

7

6

5

4

3

2

1

0

DSK

0

0

0 DMAEN NOPREC DRATE DRATE

CHG

SEL1 SEL0

RESET N/A

0

0

0

0

0

1

0

COND.

BITS 0 - 1 DATA RATE SELECT

These bits control the data rate of the floppy

controller. See Table 14 for the settings

corresponding to the individual data rates. The

data rate select bits are unaffected by a

software reset, and are set to 250 Kbps after a

hardware reset.

BIT 2 NOPREC

This bit reflects the value of NOPREC bit set in

the CCR register.

BIT 3 DMAEN

This bit reflects the value of DMAEN bit set in

the DOR register bit 3.

BITS 4 - 6 UNDEFINED

Always read as a logic "0"

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]).

32

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