W83977EF Winbond Electronics Corp America, W83977EF Datasheet - Page 18

• Manufacturer Part Number: W83977EF
• Description: Description = W83877TF Plus Kbc, GP I/O, Wake-Up, Power Fail Resume ;; Package = QFP 128
• Manufacturer: Winbond Electronics Corp America

1.5 Multi-Mode Parallel Port, continued
BUSY
ACK#
ERR#
SYMBOL
PIN
21
22
34
OD
OD
OD
OD
OD
OD
I/O
IN
IN
IN
12
12
12
12
12
12
t
t
t
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.
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FUNCTION
Publication Release Date: April 2003
W83977EF
Revision 1.1