TL16PIR552 Datasheet, PDF (2/52 Pages) Texas Instruments – DUAL UART WITH DUAL IrDA AND 1284 PARALLEL PORT

TL16PIR552
DUAL UART WITH DUAL IrDA AND
1284 PARALLEL PORT
SLLS222A – DECEMBER 1995 – REVISED AUGUST 1996
description (continued)
The receiver and transmitter FIFOs in the UARTs store up to 16 bytes including three additional bits of error
status per byte for the receiver FIFO. In the FIFO mode, there is a selectable autoflow control feature that can
significantly reduce software overload and increase system efficiency by automatically controlling serial data
flow through RTS output and CTS input signals.
The TL16PIR552 UART includes a programmable baud-rate generator capable of dividing a reference clock
by divisors from 1 to 65535 and producing a 16× reference clock for the internal transmitter logic. Provisions
are also included to use this 16× clock for the receiver logic. The UART accommodates a 1-Mbaud serial rate
(16-MHz input clock) so that a bit time is 1 µs and a typical character time is 10 µs (start bit, eight data bits, stop
bit).
Each serial channel has a prescaler with programmable divisor values from 0 to 33. The serial ports also have
a dedicated infrared serial data input (IRSIN0/1) and the serial data outputs multiplex between a RS-232-type
serial output or an infrared serial data output. This is selected through an internal register bit and uses the same
SOUT0/1 output terminals. The same UART circuit is used for the data path for the IrDA or the RS-232
operations. Channel 0 is powered up at IR0 and channel 1 is powered up during the RS-232 mode.
In addition to dual communication capabilities, the TL16PIR552 provides the user with an IEEE 1284 host side
compatible, bidirectional, parallel data port. The parallel port operates in a compatible, FIFO, extended
capability port (ECP) with RLE data decompression mode, and in a enhanced parallel port (EPP) mode. The
default mode of operation is compatible with the Centronics printer port. The parallel port and the two serial ports
provide IBM PC/AT™-compatible computers with a single device to serve a 3-port system.
PH PACKAGE
(TOP VIEW)
IRSIN0
DCD0
RI0
SIN0
GND
SOUT1
DTR1
RTS1
CLK_OUT1
VCC
SIN1
DSR1
DCD1
IRSIN1
CTS1
RI1
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INTRPT0
IOCHRDY
BDO
VCC
CLK_OUT0
PDRQ
PINTR
TXRDY1
TXRDY0
XOUT
GND
XIN
TEST
ACK
BUSY
FAULT
IBM and PC/AT are trademarks of International Business Machines Corporation.
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