W83977EF Datasheet, PDF(21/150 Page) Winbond

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W83977EF Datasheet, PDF (21/150 Pages) Winbond – WINBOND I/O

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W83977EF

1.5 Multi-Mode Parallel Port, continued

SYMBOL PIN

I/O

PD3

I/O24t

INt

PD4

I/O24t

INt

PD5

PD6

INt

I/O24t

OD24

FUNCTION

PRINTER MODE: PD3

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

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

EXTENSION FDD MODE: RDATA2#

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

same as the RDATA# pin of FDC. It is pulled high internally.

EXTENSION 2FDD MODE: RDATA2#

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

the same as the RDATA# pin of FDC. It is pulled high internally.

PRINTER MODE: PD4

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

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

EXTENSION FDD MODE: DSKCHG2#

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

same as the DSKCHG# pin of FDC. It is pulled high internally.

EXTENSION 2FDD MODE: DSKCHG2#

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

the same as the DSKCHG# pin of FDC. It is pulled high internally.

PRINTER MODE: PD5

Parallel port data bus bit 5. Refer to description of the parallel

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

EXTENSION FDD MODE: This pin is a tri-state output.

EXTENSION 2FDD MODE: This pin is a tri-state output.

PRINTER MODE: PD6

Parallel port data bus bit 6. Refer to description of the parallel

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

EXTENSION FDD MODE: This pin is a tri-state output.

EXTENSION. 2FDD MODE: MOA2#

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

MOA# pin of FDC.

Publication Release Date: April 2003

-15 -

Revision 1.1

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