W83877 Winbond Electronics Corp America, W83877 Datasheet - Page 12

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

1.4
INIT
AFD
SYMBOL
Multi-Mode Parallel Port, continued
PIN
21
20
OUT
OUT
OUT
OUT
OD
OD
OD
OD
OD
OD
I/O
12
12
12
12
12
12
12t
12t
12t
12t
PRINTER MODE: INIT
Output line for the printer initialization. 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: DIR2
This pin is for Extension FDD B; its function is the same as that
of the DIR pin.
EXTENSION ADAPTER MODE: XDACK
This pin is the DMA acknowledge output for the Extension
Adapter; the output is sent directly from PDACKX .
EXTENSION 2FDD MODE: DIR2
This pin is for Extension FDD A and B; its function is the same
as that of the DIR pin.
JOYSTICK MODE: V
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 the description of the parallel port for the definition of
this pin in ECP and EPP mode.
EXTENSION FDD MODE: RWC2
This pin is for Extension FDD B; its function is the same as that
of the RWC pin.
EXTENSION ADAPTER MODE: XRD
This pin is the I/O read 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: RWC2
This pin is for Extension FDD A and B; its function is the same
as that of the RWC pin.
JOYSTICK MODE: V
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DD
DD
for joystick.
for joystick.
FUNCTION
W83877F