w83977atf Winbond Electronics Corp America, w83977atf Datasheet - Page 15

• Manufacturer Part Number: w83977atf
• Description: Winbond I/o
• Manufacturer: Winbond Electronics Corp America

1.5 Multi-Mode Parallel Port, continued
PD0
PD1
PD2
PD3
SYMBOL
PIN
31
30
29
28
I/O
I/O
I/O
I/O
I/O
IN
IN
IN
IN
IN
IN
IN
IN
24t
24t
24t
24t
t
t
t
t
t
t
t
t
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; its function is the same as the
INDEX pin of FDC. It is pulled high internally.
EXTENSION 2FDD MODE: INDEX2
This pin is for Extension FDD A and B; its function is the same
as the INDEX pin of FDC. It 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; its function is the same as the
EXTENSION. 2FDD MODE: TRAK02
This pin is for Extension FDD A and B; its function is the same
as the TRAK0 pin of FDC. It is pulled high internally.
PRINTER MODE: PD2
Parallel port data bus bit 2. Refer to the description of the
parallel port for the definition of this pin in ECP and EPP mode.
EXTENSION FDD MODE: WP2
This pin is for Extension FDD B; its function is the same as the
EXTENSION. 2FDD MODE: WP2
This pin is for Extension FDD A and B; its function is the same
as the WP pin of FDC. It is pulled high internally.
PRINTER MODE: PD3
Parallel port data bus bit 3. Refer to the description of the
parallel port for the definition of this pin in ECP and EPP mode.
EXTENSION FDD MODE: RDATA2
This pin is for Extension FDD B; its function is the same as the
RDATA pin of FDC. It is pulled high internally.
EXTENSION 2FDD MODE: RDATA2
This pin is for Extension FDD A and B; its function is the same
as the RDATA pin of FDC. It is pulled high internally.
TRAK0 pin of FDC. It is pulled high internally.
WP
pin of FDC. It is pulled high internally.
-14-
FUNCTION
Publication Release Date: April 1998
W83977ATF
PRELIMINARY
Revision 0.52