FDC37B80X Ver la hoja de datos (PDF) - SMSC -> Microchip

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FDC37B80X

PC98/99 compliant enhanced super I/O controller with Keyboard / Mouse Wake-Up / 5 Volt Operation

SMSC -> Microchip 

PIN

No./QFP

92

75:68

66

67

83

82

81

77

80

79

78

59

58

57

56

64

63

DESCRIPTION OF PIN FUNCTIONS

NAME

TOTAL SYMBOL

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

I/IO24

IO24

OD24/O24

OD24/O24

OD24/O24

OD24/O24

I

I

I

I

I

IOD16

IOD16

IOD16

IOD16

O4

O4

Note 1:

Note 2:

Note 3:

Note 4:

Note 5:

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 FDC37B80x addressing modes.

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

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.

Requires external pull-up resistor.

8

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