W83977EG-AW Datasheet, PDF (17/142 Pages) Nuvotem Talema – These products are not designed for use in life support appliances

W83977EF-AW/W83977EG-AW
Multi-Mode Parallel Port, continued
SYMBOL PIN
I/O
STB#
36
OD₁₂
PD0
PD1
PD2
PD3
-
-
31
I/O_24t
IN_t
IN_t
30
I/O_24t
IN_t
IN_t
29
I/O24t
INt
INt
28
I/O24t
INt
INt
FUNCTION
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.
Publication Release Date: Apr. 2006
-15-
Revision 1.2