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

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FDC87W22

Power I/O Controller

SMSC -> Microchip 

SYMBOL

nERR

nSLIN

PIN

I/O

FUNCTION

29

INt

PRINTER MODE: nERR

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

encountered an error condition. 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: nHEAD2

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

that of the nHEAD pin.

EXTENSION ADAPTER MODE: XA2

OUT12t This pin is system address A2 for the Extension Adapter.

OD12

EXTENSION 2FDD MODE: nHEAD2

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

same as that of the nHEAD pin.

JOYSTICK MODE: NC pin.

_

22

OD12 PRINTER MODE: nSLIN

Output line for detection of printer selection. 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

OUT12t

EXTENSION FDD MODE: nSTEP2

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

that of the nSTEP pin.

EXTENSION ADAPTER MODE: XTC

OD12

This pin is the DMA terminal count for the Extension Adapter.

The count is sent by TC directly.

EXTENSION 2FDD MODE: nSTEP2

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

OUT12t same as that of the nSTEP pin .

JOYSTICK MODE: VDD for joystick.

12

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