FDC37M81 View Datasheet(PDF) - SMSC -> Microchip

Part Name

Description

Manufacturer

FDC37M81

PC98/99 Compliant Enhanced Super I/O Controller with Keyboard/Mouse Wake-Up

SMSC -> Microchip 

DESCRIPTION OF PIN FUNCTIONS

PIN

No./QFP

7,41,

60,76

18

16

11

10

12

8

9

17

5

3

15

14

13

1

2

84

85

87

88

89

86

91

90

95

96

98

Ground

NAME

TOTAL SYMBOL

VSS

+5 Volt Standby Supply

VTR

Voltage (Note 7)

FDD INTERFACE (14)

Read Disk Data

1

nRDATA

Write Gate

1

nWGATE

Write Disk Data

1

nWDATA

Head Select

1

nHDSEL

Step Direction

1

nDIR

Step Pulse

1

nSTEP

Disk Change

1

nDSKCHG

Drive Select 0

1

nDS0

Motor On 0

1

nMTR0

Write Protected

1

nWRTPRT

Track 0

1

nTRKO

Index Pulse Input

1

nINDEX

Drive Density Select 0

Drive Density Select 1

1

DRVDEN0

1

DRVDEN1

SERIAL PORT 1 INTERFACE (8)

Receive Serial Data 1

1

RXD1

Transmit Serial Data 1

1

TXD1

Request to Send 1/System

Option (Note 6)

1

nRTS1/

SYSOPT

Clear to Send 1

1

nCTS1

Data Terminal Ready 1

1

nDTR1

Data Set Ready 1

1

nDSR1

Data Carrier Detect 1

1

nDCD1

Ring Indicator 1

1

nRI1

SERIAL PORT 2 INTERFACE (8)

Receive Serial Data 2/Infrared

Rx

1

RXD2/IRRX

Transmit Serial Data 2/Infrared

Tx (Note 4)

1

TXD2/IRTX

Request to Send 2/Sys Addr 12

1

nRTS2/

SA12

7

BUFFER TYPE

PER FUNCTION

(NOTE 1)

IS

(O24/OD24)

(O24/OD24)

(O24/OD24)

(O24/OD24)

(O24/OD24)

IS

(O24/OD24)

(O24/OD24)

IS

IS

IS

(O24/OD24)

(O24/OD24)

I

O4

O4/I

I

O4

I

I

I

I/I

O24PD/ O24PD

O4/I

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