W83L517D_05 Datasheet, PDF (12/133 Pages) Winbond – LPC I/O for Notebook

W83L517D/W83L517D-F
4.3 Multi-Mode Parallel Port
The following pins have alternate functions, which are controlled by CR28 and L3-CRF0.
SYMBOL
PIN
PRT_NFDD#
20
I/O
IN_tsp3
FUNCTION
PRT_NFDD# is the printer Not Floppy signal. It
indicated the connected device as Printer or Floppy
Disk on printer port. If the default function(Printer
mode) is used, it must connect to low level.
SLCT
(WE2#)
21
IN_t
PRINTER MODE:
An active high input on this pin indicates that the
printer is selected. This pin is pulled high internally.
Refer to the 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; its function is
the same as the _WE# pin of FDC.
PE
(WD2#)
22
IN_t
PRINTER MODE:
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 the description of the
parallel port for the 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.
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