W83877ATF Datasheet, PDF (17/191 Pages) Winbond – enhanced version from Winbonds most popular I/O chip W83877F

W83877ATF
1.3 Multi-Mode Parallel Port, continued
SYMBOL PIN
I/O
PD2
11
I/O_24t
IN_t
IN_t
PD3
PD4
PD5
12
I/O_24t
IN_t
IN_t
13
I/O_24t
IN_t
IN_t
14
I/O_24t
-
-
FUNCTION
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; the function of this pin is the
same as that of the WP pin. This pin is pulled high internally.
EXTENSION. 2FDD MODE: WP2
This pin is for Extension FDD A and B; the function of this pin is
the same as that of the WP pin. This pin 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
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.
EXTENSION 2FDD MODE: RDATA2
This pin is for Extension FDD A and B; the function of this pin is
the same as that of the RDATA pin. This pin is pulled high
internally.
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: 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.
EXTENSION 2FDD MODE: DSKCHG2
This pin is for Extension FDD A and B; the function of this pin is
the same as that of the DSKCHG pin. This pin is pulled high
internally.
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: No Connection
This pin is a tri-state output.
EXTENSION 2FDD MODE: No Connection
This pin is a tri-state output.
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Publication Release Date: April 1998
Version 0.51