FDC37N958FR datasheet(10/316 Pages) ETC1

部品番号	FDC37N958FR

部品情報	Notebook I/O Controller with Enhanced Keyboard and System Control

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SMSC DS – FDC37N958FR

Page 4

Rev. 09/01/99

DESCRIPTION OF PIN FUNCTIONS

PinPin

PIN #

NAME

DESCRIPTION

SUPPLY

VOLTAGE

TYPE

183

nFWR

Flash Memory Write

VCC1

O8

181

FALE

Flash Address latch Enable

VCC1

O8

KEYBOARD

36:30,

28:22

KSO[0:13]

Keyboard Scan Outputs(14*8 = 112)

Configuring GPIO4 and GPIO5 as

KSO14 and KSO15 yields a scan

matrix of 16 x 8 = 128.

VCC1

OD4

44:37

KSI[0:7]

Keyboard Scan Inputs

VCC1

ISP

193

nEA

External Access for 2K ROM

VCC1

I

45

EMCLK

EM Serial Clock

VCC2

I/OD 24

46

EMDAT

EM Serial Data

VCC2

I/OD 24

47

IMCLK

IM Serial Clk

VCC2

I/OD 24

48

IMDAT

IM Serial Data

VCC2

I/OD 24

50

KBCLK

KBD Serial Clock

VCC2

I/OD 24

51

KBDAT

KBD Serial Data

VCC2

I/OD 24

52

PS2CLK/

8051RX/

GPIO[20]

PS2 Serial Clock

VCC2

I/OD24

53

PS2DAT/

8051TX/

GPIO[21]

PS2 Serial Data

VCC2

I/OD24

SERIAL IRQ / UART IRQS

101

SIRQ /

IRQ3(UA1)

Serial Interrupt

UART1 Interrupt

VCC2

I/O24

/O24

99

PSBCLK

PCI Clock input

VCC2

I

100

PSBDAT

UART2 Interrupt

VCC2

I/O24

/O24

FDD INTERFACE

The following FDC output pins can be configured as either Open Drain outputs capable of

sinking 24mA (OD24) or as push-pull outputs capable of driving 12mA and sinking 24mA (O24).

The FDC output pins must tristate when the FDC is in powerdown mode (The board designer

must provide external pull-up resistors on these output pins).

17

nRDATA

Read Disk Data

VCC2

IS

12

nWGATE

Write Gate

VCC2

O24/

OD24

11

nWDATA

Write Disk Data

VCC2

O24/

OD24

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