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W83977ATF Datasheet, PDF (15/207 Pages) Winbond – WINBOND I/O
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1.5 Multi-Mode Parallel Port, continued
SYMBOL PIN
I/O
PD0
31
I/O24t
INt
INt
PD1
30
I/O24t
INt
INt
PD2
29
I/O24t
INt
INt
PD3
28
I/O24t
INt
INt
W83977ATF
PRELIMINARY
FUNCTION
PRINTER MODE: PD0
Parallel port data bus bit 0. Refer to the description of the
parallel port for the definition of this pin in ECP and EPP mode.
EXTENSION FDD MODE: INDEX2
This pin is for Extension FDD B; its function is the same as the
INDEX pin of FDC. It is pulled high internally.
EXTENSION 2FDD MODE: INDEX2
This pin is for Extension FDD A and B; its function is the same
as the INDEX pin of FDC. It is pulled high internally.
PRINTER MODE: PD1
Parallel port data bus bit 1. Refer to the description of the
parallel port for the definition of this pin in ECP and EPP mode.
EXTENSION FDD MODE: TRAK02
This pin is for Extension FDD B; its function is the same as the
TRAK0 pin of FDC. It is pulled high internally.
EXTENSION. 2FDD MODE: TRAK02
This pin is for Extension FDD A and B; its function is the same
as the TRAK0 pin of FDC. It is pulled high internally.
PRINTER MODE: PD2
Parallel port data bus bit 2. Refer to the description of the
parallel port for the definition of this pin in ECP and EPP mode.
EXTENSION FDD MODE: WP2
This pin is for Extension FDD B; its function is the same as the
WP pin of FDC. It is pulled high internally.
EXTENSION. 2FDD MODE: WP2
This pin is for Extension FDD A and B; its function is the same
as the WP pin of FDC. It is pulled high internally.
PRINTER MODE: PD3
Parallel port data bus bit 3. Refer to the description of the
parallel port for the definition of this pin in ECP and EPP mode.
EXTENSION FDD MODE: RDATA2
This pin is for Extension FDD B; its function 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; its function is the same
as the RDATA pin of FDC. It is pulled high internally.
Publication Release Date: April 1998
-14-
Revision 0.52
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