w83977eg Winbond Electronics Corp America, w83977eg Datasheet - Page 17

• Manufacturer Part Number: w83977eg
• Description: Winbond Isa I/o W83977ef W83977eg
• Manufacturer: Winbond Electronics Corp America

Multi-Mode Parallel Port, continued
STB#
PD0
PD1
PD2
PD3
SYMBOL
PIN
36
31
30
29
28
I/O24t
I/O24t
OD
I/O
I/O
INt
INt
INt
INt
I/O
IN
IN
IN
IN
-
-
24t
24t
12
t
t
t
t
PRINTER MODE: STB#
An active low output is used to latch the parallel data into the
printer. This pin is pulled high internally. 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: PD0
Parallel port data bus bit 0. Refer to description of the parallel
port for definition of this pin in ECP and EPP mode.
EXTENSION FDD MODE: INDEX2#
This pin is for Extension FDD B; the function of this pin 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; the function of this pin 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 description of the parallel
port for definition of this pin in ECP and EPP mode.
EXTENSION FDD MODE: TRAK02#
This pin is for Extension FDD B; the function of this pin 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; the function of this pin 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 description of the parallel
port for definition of this pin in ECP and EPP mode.
EXTENSION FDD MODE: WP2#
This pin is for Extension FDD B; the function of this pin 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; the function of this pin 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 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.
W83977EF-AW/W83977EG-AW
-15-
FUNCTION
Publication Release Date: Apr. 2006
Revision 1.2