w83877atd Winbond Electronics Corp America, w83877atd Datasheet - Page 13

• Manufacturer Part Number: w83877atd
• Description: Winbond I/o
• Manufacturer: Winbond Electronics Corp America

1.2 Serial Port Interface, continued
1.3 Multi-Mode Parallel Port
The following pins have eight functions, which are controlled by bits PRTMOD0, PRTMOD1, and
PRTMOD2 of CR0 and CR9 (refer to section 8.0, Extended Functions).
RTSB
PGOIQSEL
IRTX2
IRRX2
BUSY
ACK
SYMBOL
SYMBOL
PIN
PIN
45
95
94
24
26
OUT
I/O
OD
OD
OD
OD
I/O
I/O
IN
IN
IN
IN
8tc
t
t
t
12
12
t
12
12
12t
UART B Request To Send. An active low informs the modem or
data set that the controller is ready to send data.
During power-on reset, this pin is pulled down internally and is
defined as PGOIQSEL, which provides the power-on value for
CR16 bit 4 (GOIQSEL).
intending to pull up at power-on reset.
Function as a InfraRed transmission data line.
Function as a InfraRed receiving line.
PRINTER MODE: BUSY
An active high input indicates that the printer is not ready to
receive data. 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: MOB2
This pin is for Extension FDD B; the function of this pin is the
same as that of the MOB pin.
EXTENSION 2FDD MODE: MOB2
This pin is for Extension FDD A and B; the function of this pin is
the same as that of the MOB pin.
PRINTER MODE: ACK
An active low input on this pin indicates that the printer has
received data and is ready to accept more data. 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: DSB2
This pin is for the Extension FDD B; its functions are the same
as those of the DSB pin.
EXTENSION 2FDD MODE: DSB2
This pin is for Extension FDD A and B; the function of this pin is
the same as that of the DSB pin.
- 9 -
FUNCTION
FUNCTION
A 4.7 k
Publication Release Date: April 1998
is recommended when
W83877ATF
Version 0.51