W83977F-A Datasheet, PDF (22/182 Pages) Winbond – WINBOND I/O

W83977F-A/ W83977G-A/ W83977AF-A/ W83977AG-A
Multi-Mode Parallel Port, continued.
SYMBOL
PD3
PIN
I/O
28
I/O24t
INt
INt
PD4
27
I/O24t
INt
INt
PD5
26
I/O24t
-
-
PD6
24
I/O24t
-
OD24
PD7
23
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.
PRINTER MODE: PD7
Parallel port data bus bit 7. 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: DSA2
This pin is for Extension FDD A; its function is the same as the DSA pin
of FDC.
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