W83977G Winbond Electronics Corp America, W83977G Datasheet - Page 22

• Manufacturer Part Number: W83977G
• Description: W83877TF plus KBC, CIR, RTC, Pb-free
• Manufacturer: Winbond Electronics Corp America

Multi-Mode Parallel Port, continued.
PD3
PD4
PD5
PD6
PD7
SYMBOL
W83977F-A/ W83977G-A/ W83977AF-A/ W83977AG-A
PIN
28
27
26
24
23
I/O 24t
I/O 24t
I/O 24t
I/O 24t
I/O 24t
OD 24
OD 24
I/O
IN t
IN t
IN t
IN t
-
-
-
-
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:
This pin is for Extension FDD B; the function of this pin is the same as the
EXTENSION 2FDD MODE:
This pin is for Extension FDD A and B; this function of this pin is the same
as the
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:
This pin is for Extension FDD B; the function of this pin is the same as the
EXTENSION 2FDD MODE:
This pin is for Extension FDD A and B; this function of this pin is the same
as the
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:
This pin is for Extension FDD A; its function is the same as the
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:
This pin is for Extension FDD A; its function is the same as the
of FDC.
RDATA
DSKCHG
DSKCHG
RDATA
pin of FDC. It is pulled high internally.
pin of FDC. It is pulled high internally.
-14
pin of FDC. It is pulled high internally.
pin of FDC. It is pulled high internally.
RDATA2
DSKCHG2
RDATA2
DSKCHG2
DSA2
MOA2
FUNCTION
MOA
DSA
pin
pin