FDC37C669FR View Datasheet(PDF) - SMSC -> Microchip

Part Name

Description

Manufacturer

FDC37C669FR

Super I/O Floppy Disk Controller with Fast Infrared Support

SMSC -> Microchip 

PS/2 Model 30 Mode

7

6

5

4

3

2

1

0

NOPREC DRATE DRATE

SEL1 SEL0

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

N/A

1

0

COND.

BIT 0 and 1 DATA RATE SELECT 0 and 1

These bits determine the data rate of the floppy

controller. See Table 13 for the appropriate

values.

BIT 2 NO PRECOMPENSATION

This bit can be set by software, but it has no

functionality. It can be read by bit 2 of the DSR

when in Model 30 register mode. Unaffected by

software reset.

BIT 3 - 7 RESERVED

Should be set to a logical "0"

Table 13 shows the state of the DENSEL pin.

The DENSEL pin is set high after a hardware

reset and is unaffected by the DOR and the

DSR resets.

34

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