W83877TF/W83877TG
-12 -
Multi-Mode Parallel Port, continued
SYMBOL PIN I/O FUNCTION
PD2 11 I/O24t
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.
IN
t
EXTENSION FDD MODE: WP2
This pin is for Extension FDD B; the function of this pin is the
same as that of the
WP
pin. This pin is pulled high internally.
IN
t
EXTENSION. 2FDD MODE:
WP2
This pin is for Extension FDD A and B; this function of this pin is
the same as that of the
WP
pin. This pin is pulled high internally.
PD3
12 I/O
24t
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.
IN
t
EXTENSION FDD MODE:
RDATA2
Motor on B for Extension FDD B; the function of this pin is the
same as that of the
RDATA pin. This pin is pulled high internally.
IN
t
EXTENSION 2FDD MODE:
RDATA2
This pin is for Extension FDD A and B; this function of this pin is
the same as that of the
RDATA pin. This pin is pulled high
internally.
PD4
13 I/O24t
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.
INt
EXTENSION FDD MODE:
DSKCHG2
Drive select B for Extension FDD B; the function of this pin is the
same as that of
DSKCHG
pin. This pin is pulled high internally.
INt
EXTENSION 2FDD MODE:
DSKCHG2
This pin is for Extension FDD A and B; this function of this pin is
the same as that of the
DSKCHG
pin. This pin is pulled high
internally.
PD5
14 I/O24t
I/O24t
I/O24t
PRINTER MODE: PD5
Parallel port data bus bit 5. 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 2FDD MODE: This pin is a tri-state output.
