W83977EF Datasheet, PDF (18/150 Pages) Winbond – WINBOND I/O

W83977EF
1.5 Multi-Mode Parallel Port, continued
SYMBOL PIN
I/O
BUSY
21
IN_t
OD₁₂
OD₁₂
ACK#
22
IN_t
ERR#
OD₁₂
OD₁₂
34
IN_t
OD₁₂
OD₁₂
FUNCTION
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.
PRINTER MODE: ERR#
An active low input on this pin indicates that the printer has
encountered an error condition. 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: HEAD2#
This pin is for Extension FDD B; its function is the same as the
HEAD#pin of FDC.
EXTENSION 2FDD MODE: HEAD2#
This pin is for Extension FDD A and B; its function is the same as
the HEAD# pin of FDC.
Publication Release Date: April 2003
-12 -
Revision 1.1