FDC87W21 Ver la hoja de datos (PDF) - SMSC -> Microchip

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FDC87W21

Power I/O Controller with Fast Infrared Support

SMSC -> Microchip 

SYMBOL

BUSY

nACK

PE

PIN

I/O

FUNCTION

24

INt PRINTER MODE: BUSY

An active high input indicates that the printer is not ready to receive

data. This pin is pulled high internally. Refer to the description of

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

OD12 EXTENSION FDD MODE: nMOB2

This pin is for Extension FDD B; the function of this pin is the same

as that of the nMOB pin.

INt EXTENSION ADAPTER MODE: XIRQ

This pin is an interrupt request generated by the Extension Adapter

and is an active high input.

OD12 EXTENSION 2FDD MODE: nMOB2

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

same as that of the nMOB pin.

-

JOYSTICK MODE: NC pin.

26

INt PRINTER MODE: nACK

An active low input on this pin indicates that the printer has

received data and is ready to accept more data. This pin is pulled

high internally. Refer to the description of the parallel port for the

definition of this pin in ECP and EPP mode.

OD12 EXTENSION FDD MODE: nDSB2

This pin is for the Extension FDD B; its functions are the same as

those of the nDSB pin.

INt EXTENSION ADAPTER MODE: XDRQ

DMA request generated by the Extension Adapter. An active high

input.

OD12 EXTENSION 2FDD MODE: nDSB2

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

the same as that of the nDSB pin.

-

JOYSTICK MODE: NC pin.

27

INt PRINTER MODE: PE

An active high input on this pin indicates that the printer has

detected the end of the paper. This pin is pulled high internally.

Refer to the description of the parallel port for the definition of this

pin in ECP and EPP mode.

OD12 EXTENSION FDD MODE: nWD2

This pin is for Extension FDD B; its function is the same as that of

the nWD pin.

OUT12t EXTENSION ADAPTER MODE: XA0

This pin is system address A0 for the Extension Adapter

OD12 EXTENSION 2FDD MODE: nWD2

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

the same as that of the nWD pin.

-

JOYSTICK MODE: NC pin.

10

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