w83977ctf Winbond Electronics Corp America, w83977ctf Datasheet - Page 20

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

1.5 Multi-Mode Parallel Port
The following pins have alternate functions, which are controlled by CR28 and L3-CRF0.
SLCT
PE
SYMBOL
PIN
18
19
OD
OD
OD
OD
I/O
IN
IN
12
12
12
12
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; its 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.
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FUNCTION
Publication Release Date: March 1999
W83977EF/ CTF
PRELIMINARY
Revision A1