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W83977CTF

WINBOND I/O

Winbond 

W83977EF/ CTF

PRELIMINARY

1.5 Multi-Mode Parallel Port, continued

SYMBOL PIN

I/O

BUSY

21

INt

OD12

OD12

FUNCTION

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

description of the parallel port for definition of this pin in ECP

and EPP mode.

EXTENSION FDD MODE: MOB2#

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

same as the MOB# pin of FDC.

EXTENSION 2FDD MODE:MOB2#

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

the same as the MOB# pin of FDC.

ACK#

22

INt PRINTER MODE: ACK#

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 description of the parallel port for

definition of this pin in ECP and EPP mode.

OD12

EXTENSION FDD MODE: DSB2#

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

the DSB# pin of FDC.

OD12

EXTENSION 2FDD MODE: DSB2#

This pin is for Extension FDD A and B; it function is the same as

the DSB# pin of FDC.

ERR#

34

INt PRINTER MODE: ERR#

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

encountered an error condition. This pin is pulled high internally.

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

ECP and EPP mode.

OD12

OD12

EXTENSION FDD MODE: HEAD2#

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

HEAD#pin of FDC.

EXTENSION 2FDD MODE: HEAD2#

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

as the HEAD# pin of FDC.

Publication Release Date: March 1999

-12 -

Revision A1

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