W83877 Winbond Electronics Corp America, W83877 Datasheet - Page 13

• Manufacturer Part Number: W83877
• Description: Winbond I/O
• Manufacturer: Winbond Electronics Corp America

1.4
STB
PD0
SYMBOL
Multi-Mode Parallel Port, continued
PIN
19
9
OUT
OUT
OD
I/O
I/O
I/O
I/O
IN
IN
-
-
24t
24t
24t
12
t
t
12t
12t
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:
This pin is a tri-state output.
EXTENSION ADAPTER MODE: XWR
This pin is the I/O write command for the Extension Adapter.
When the Extension Adapter base address is written to the
Extension Adapter address register, XRD and XWR go low
simultaneously so that the command register on the Extension
Adapter can latch the same base address.
EXTENSION 2FDD MODE: This pin is a tri-state output.
JOYSTICK MODE: V
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 ADAPTER MODE: XD0
This pin is system data bus D0 for the Extension Adapter.
EXTENSION 2FDD MODE: INDEX2
This pin is for Extension FDD A and B; this function of this pin is
the same as INDEX pin. This pin is pulled high internally.
JOYSTICK MODE: JP0
This pin is the paddle 0 input for joystick.
- 13 -
DD
for joystick.
FUNCTION
Publication Release Date: January 1996
W83877F
Revision A2