W83977EF Datasheet, PDF (17/150 Pages) Winbond – WINBOND I/O

W83977EF
1.5 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
EXTENSION FDD MODE: _WE2#
This pin is for Extension FDD B; its function is the same as the
WE# pin of FDC.
OD₁₂
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.
Refer to description of the parallel port for definition of this pin in
ECP and EPP mode.
OD₁₂
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.
Publication Release Date: April 2003
-11 -
Revision 1.1