W83977A Winbond Electronics Corp America, W83977A Datasheet - Page 17
W83977A
Manufacturer Part Number
W83977A
Description
Winbond I/O
Manufacturer
Winbond Electronics Corp America
Datasheet
1.W83977A.pdf
(160 pages)
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1.3 Serial Port Interface, continued
1.4 Infrared Interface
1.5 Multi-Mode Parallel Port
The following pins have alternate functions, which are controlled by CR28 and L3-CRF0.
IRRX
IRTX
RIA
RIB
SLCT
PE
SYMBOL
SYMBOL
SYMBOL
PIN
PIN
PIN
65
66
37
38
18
19
OUT
OD
OD
OD
OD
IN
I/O
I/O
I/O
IN
IN
IN
cs
12
12
12
12
t
t
t
12t
Ring Indicator. An active low signal indicates that a ring signal is
being received from the modem or data set.
Infrared Receiver input.
Infrared Transmitter Output.
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.
EXTENSION FDD MODE: WE2
This pin is for Extension FDD B; its function is the same as the WE
pin of FDC.
EXTENSION 2FDD MODE: WE2
This pin is for Extension FDD A and B; it function is the same as
the WE pin of FDC.
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.
EXTENSION FDD MODE: WD2
This pin is for Extension FDD B; its function is the same as the
EXTENSION 2FDD MODE: WD2
This pin is for Extension FDD A and B; its function is the same as
the WD pin of FDC.
WD pin of FDC.
-9 -
FUNCTION
FUNCTION
FUNCTION
Publication Release Date: April 1998
W83977TF
PRELIMINARY
Revision 0.62
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