W83977ATF Datasheet, PDF (13/207 Pages) Winbond – WINBOND I/O

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
W83977ATF
PRELIMINARY
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 the
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; its function is the same as the
MOB pin of FDC.
EXTENSION 2FDD MODE: MOB2
This pin is for Extension FDD A and B; its function 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 the description of the parallel port
for the 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; its function 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 the description of the parallel port for the 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
HEADpin 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 1998
-12-
Revision 0.52