
W83977TF
PRELIMINARY
Publication Release Date: April 1998
-11 -
Revision 0.62
1.5 Multi-Mode Parallel Port, continued
SYMBOL
PIN
I/O
FUNCTION
SLIN
32
OD
12
OD
12
OD
12
PRINTER MODE: SLIN
Output line for detection of printer selection. 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:
STEP2
This pin is for Extension FDD B; its function is the same as the
STEP
pin of FDC.
EXTENSION 2FDD MODE:
STEP2
This pin is for Extension FDD A and B; its function is the same as
the STEP pin of FDC.
INIT
33
OD
12
OD
12
OD
12
PRINTER MODE: INIT
Output line for the printer initialization. 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:
DIR2
This pin is for Extension FDD B; its function is the same as the
DIR
pin of FDC.
EXTENSION 2FDD MODE:
DIR2
This pin is for Extension FDD A and B; its function is the same as
the DIR pin of FDC.
AFD
35
OD
12
OD
12
OD
12
PRINTER MODE: AFD
An active low output from this pin causes the printer to auto feed a
line after a line is printed. 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: DRVDEN0
This pin is for Extension FDD B; its function is the same as the
DRVDEN0 pin of FDC.
EXTENSION 2FDD MODE: DRVDEN0
This pin is for Extension FDD A and B; its function is the same as
the DRVDEN0 pin of FDC.