W83977EG-AW Datasheet, PDF (15/142 Pages) Nuvotem Talema – These products are not designed for use in life support appliances

W83977EF-AW/W83977EG-AW
4.5 Multi-Mode Parallel Port
The following pins have alternate functions, which are controlled by CR28 and L3-CRF0.
SYMBOL
PIN
I/O
FUNCTION
SLCT
18
IN_t
PRINTER MODE: SLCT
An active high input on this pin indicates that the printer is
selected. This pin is pulled high internally. Refer to description
of the parallel port for definition of this pin in ECP and EPP
mode.
OD₁₂
OD₁₂
EXTENSION FDD MODE: _WE2#
This pin is for Extension FDD B; its function is the same as the
WE# pin of FDC.
EXTENSION 2FDD MODE: WE2#
This pin is for Extension FDD A and B; it function is the same as
the WE# pin of FDC.
PE
19
IN_t
PRINTER MODE: PE
An active high input on this pin indicates that the printer has
detected the end of the paper. This pin is pulled high internally.
OD₁₂
Refer to description of the parallel port for definition of this pin in
ECP and EPP mode.
EXTENSION FDD MODE: WD2#
This pin is for Extension FDD B; its function is the same as the
WD# pin of FDC.
OD₁₂ EXTENSION 2FDD MODE: WD2#
This pin is for Extension FDD A and B; its function is the same
as the WD# pin of FDC.
BUSY
21
IN_t
PRINTER MODE: BUSY
An active high input indicates that the printer is not ready to
receive data. This pin is pulled high internally. Refer to
OD₁₂
description of the parallel port for definition of this pin in ECP
and EPP mode.
OD₁₂
EXTENSION FDD MODE: MOB2#
This pin is for Extension FDD B; the function of this pin is the
same as the MOB# pin of FDC.
EXTENSION 2FDD MODE:MOB2#
This pin is for Extension FDD A and B; the function of this pin is
the same as the MOB# pin of FDC.
ACK#
22
IN_t
PRINTER MODE: ACK#
An active low input on this pin indicates that the printer has
received data and is ready to accept more data. This pin is
pulled high internally. Refer to description of the parallel port for
OD₁₂ ^{definition of this pin in ECP and EPP mode.}
EXTENSION FDD MODE: DSB2#
OD₁₂
This pin is for the Extension FDD B; its functions is the same as
the DSB# pin of FDC.
EXTENSION 2FDD MODE: DSB2#
This pin is for Extension FDD A and B; it functions is the same
as the DSB# pin of FDC.
Publication Release Date: Apr. 2006
-13-
Revision 1.2