w83877atd Winbond Electronics Corp America, w83877atd Datasheet - Page 16

• Manufacturer Part Number: w83877atd
• Description: Winbond I/o
• Manufacturer: Winbond Electronics Corp America

1.3 Multi-Mode Parallel Port, continued
PD0
PD1
STB
SYMBOL
PIN
19
10
9
I/O
I/O
OD
I/O
IN
IN
IN
IN
-
-
24t
24t
12
t
t
t
t
PRINTER MODE: STB
An active low output is used to latch the parallel data into the
printer. 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: No Connection
This pin is a tri-state output.
EXTENSION 2FDD MODE: No Connection
This pin is a tri-state output.
PRINTER MODE: PD0
Parallel port data bus bit 0. Refer to the description of the
parallel port for the definition of this pin in ECP and EPP mode.
EXTENSION FDD MODE: INDEX2
This pin is for Extension FDD B; the function of this pin is the
same as that of the INDEX pin. This pin is pulled high internally.
EXTENSION 2FDD MODE: INDEX2
This pin is for Extension FDD A and B; the function of this pin is
the same as INDEX pin. This pin is pulled high internally.
PRINTER MODE: PD1
Parallel port data bus bit 1. Refer to the description of the
parallel port for the definition of this pin in ECP and EPP mode.
EXTENSION FDD MODE: TRAK02
This pin is for Extension FDD B; the function of this pin is the
same as that of the TRAK0 pin. This pin is pulled high internally.
EXTENSION. 2FDD MODE: TRAK02
This pin is for Extension FDD A and B; the function of this pin is
the same as TRAK0 pin. This pin is pulled high internally.
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FUNCTION
Publication Release Date: April 1998
W83877ATF
Version 0.51