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

99

100

97

94

92

75:68

66

67

83

82

81

77

80

79

78

59

58

57

56

64

63

NAME

TOTAL SYMBOL

Clear to Send 2/Sys Addr 13

1

nCTS2/

SA13

Data Terminal Ready/Sys Addr

1

nDTR2/

14

SA14

Data Set Ready 2/Sys Addr 15

1

nDSR2/

SA15

Data Carrier Detect 2/8042 P12

1

nDCD2/P12

Ring Indicator 2/8042 P16

1

nRI2/P16

PARALLEL PORT INTERFACE (17)

Parallel Port Data Bus

8

PD[0:7]

Printer Select

1

nSLCTIN

Initiate Output

1

nINIT

Auto Line Feed

1

nALF

Strobe Signal

1

nSTROBE

Busy Signal

1

BUSY

Acknowledge Handshake

1

nACK

Paper End

1

PE

Printer Selected

1

SLCT

Error at Printer

1

nERROR

KEYBOARD/MOUSE INTERFACE (6)

Keyboard Data

1

KDAT

Keyboard Clock

1

KCLK

Mouse Data

1

MDAT

Mouse Clock

1

MCLK

Keyboard Reset

1

KBDRST

(Note 3)

Gate A20

1

A20M

BUFFER TYPE

PER FUNCTION

(NOTE 1)

I/I

O4/I

I/I

I/IO24

I/IO24

IO24

OD24/O24

OD24/O24

OD24/O24

OD24/O24

I

I

I

I

I

IOD16

IOD16

IOD16

IOD16

O4

O4

Note:

Note 1:

Note 2:

Note 3:

Note 4:

The "n" as the first letter of a signal name indicates an "Active Low" signal.

Buffered types per function on multiplexed pins are separated by a slash “/”. Buffer types in

parenthesis represent multiple buffer types for a single pin function.

For 12 bit addressing, SA0:SA11 only, nCS should be tied to GND. For 16 bit external

address qualification, address bits SA11:SA15 can be "ORed" together and applied to nCS.

The nCS pin functions as SA11 in full 16 bit Internal Address Qualification Mode. CR24.6

controls the FDC37M81x addressing modes.

KBDRST is active low.

The pull-down on this pin is always active including when the output driver is tristated and

regardless of the state of internal PWRGOOD.

8

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