w83977eg Winbond Electronics Corp America, w83977eg Datasheet - Page 15

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

4.5
The following pins have alternate functions, which are controlled by CR28 and L3-CRF0.
SLCT
PE
BUSY
ACK#
SYMBOL
Multi-Mode Parallel Port
PIN
18
19
21
22
OD
OD
OD
OD
OD
OD
OD
OD
I/O
IN
IN
IN
IN
12
12
12
12
12
12
12
12
t
t
t
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.
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.
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.
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.
EXTENSION 2FDD MODE: WD2#
This pin is for Extension FDD A and B; its function is the same
as the WD# pin of FDC.
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
description of the parallel port for definition of this pin in ECP
and EPP mode.
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.
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
definition of this pin in ECP and EPP mode.
EXTENSION FDD MODE: DSB2#
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.
W83977EF-AW/W83977EG-AW
-13-
FUNCTION
Publication Release Date: Apr. 2006
Revision 1.2