W83977TF-A View Datasheet(PDF) - Winbond

Part Name

Description

Manufacturer

W83977TF-A

WINBOND I/O

Winbond 

1.5 Multi-Mode Parallel Port, continued

SYMBOL PIN

I/O

PD3

28

I/O24t

INt

INt

PD4

PD5

PD6

27

I/O24t

INt

INt

26

I/O24t

-

-

24

I/O24t

-

OD24

W83977TF

PRELIMINARY

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 1998

-13 -

Revision 0.62

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