w83977atg Winbond Electronics Corp America, w83977atg Datasheet - Page 22

• Manufacturer Part Number: w83977atg
• Description: W83877tf Plus Kbc, Gp I/o, Wake-up, Fir, Cir, Pb-free
• Manufacturer: Winbond Electronics Corp America

Multi-Mode Parallel Port, continued
PD1
PD2
PD3
PD4
SYMBOL
PIN
30
29
28
27
I/O24t
I/O
I/O
I/O
I/O
INt
INt
IN
IN
IN
IN
IN
IN
24t
24t
24t
t
t
t
t
t
t
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:
This pin is for Extension FDD B; its function is the same as the
pin of FDC. It is pulled high internally.
EXTENSION. 2FDD MODE:
This pin is for Extension FDD A and B; its function is the same as the
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:
This pin is for Extension FDD B; its function is the same as the
of FDC. It is pulled high internally.
EXTENSION. 2FDD MODE:
This pin is for Extension FDD A and B; its function is the same as the
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:
This pin is for Extension FDD B; its function is the same as the
pin of FDC. It is pulled high internally.
EXTENSION 2FDD MODE:
This pin is for Extension FDD A and B; its function is the same as the
PRINTER MODE: PD4
Parallel port data bus bit 4. 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 for Extension FDD B; the function of this pin is the same as
the
EXTENSION 2FDD MODE:
This pin is for Extension FDD A and B; this function of this pin is the
same as the
RDATA
TRAK0
WP
DSKCHG
pin of FDC. It is pulled high internally.
pin of FDC. It is pulled high internally.
pin of FDC. It is pulled high internally.
DSKCHG
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pin of FDC. It is pulled high internally.
W83977ATF/W83977ATG
pin of FDC. It is pulled high internally.
DSKCHG2
TRAK02
RDATA2
WP2
RDATA2
DSKCHG2
TRAK02
WP2
FUNCTION
RDATA
TRAK0
WP
pin