w83977ctf Winbond Electronics Corp America, w83977ctf Datasheet - Page 24

• Manufacturer Part Number: w83977ctf
• Description: Winbond I/o
• Manufacturer: Winbond Electronics Corp America

1.5 Multi-Mode Parallel Port, continued
PD4
PD5
PD6
PD3
SYMBOL
PIN
28
27
26
24
I/O
I/O
I/O
I/O
OD
I/O
IN
IN
IN
IN
-
-
-
12t
12t
12t
12t
12
t
t
t
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: 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.
-15 -
FUNCTION
Publication Release Date: March 1999
W83977EF/ CTF
PRELIMINARY
Revision A1