FDC87W22 查看數據表（PDF） - SMSC -> Microchip

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FDC87W22

Power I/O Controller

SMSC -> Microchip 

SYMBOL

PIN

I/O

FUNCTION

PD3

12

I/O24t PRINTER MODE: PD3

Parallel port data bus bit 3. Refer to the description of the

parallel port for the definition of this pin in ECP and EPP

INt

mode.

EXTENSION FDD MODE: nRDATA2

I/O24t

Motor on B for Extension FDD B; the function of this pin is the

same as that of the nRDATA pin. This pin is pulled high

internally.

EXTENSION ADAPTER MODE: XD3

INt

This pin is system data bus D3 for the Extension Adapter.

EXTENSION 2FDD MODE: nRDATA2

This pin is for Extension FDD A and B; this function of this pin

-

is the same as that of the nRDATA pin. This pin is pulled high

internally.

JOYSTICK MODE: NC pin

PD4

13

I/O24t PRINTER MODE: PD4

Parallel port data bus bit 4. Refer to the description of the

parallel port for the definition of this pin in ECP and EPP

INt

mode.

EXTENSION FDD MODE: nDSHCHG2

I/O24t

Drive select B for Extension FDD B; the function of this pin is

the same as that of nDSHCHG pin. This pin is pulled high

internally.

EXTENSION ADAPTER MODE: XD4

INt

This pin is system data bus D4 for the Extension Adapter.

EXTENSION 2FDD MODE: nDSKCHG2

This pin is for Extension FDD A and B; this function of this pin

INt

is the same as that of the nDSKCHG pin. This pin is pulled

high internally.

JOYSTICK MODE: JB0

This pin is the button 0 input for the joystick.

16

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