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TL16PIR552 Folha de dados(PDF) 2 Page - Texas Instruments |
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TL16PIR552 Folha de dados(HTML) 2 Page - Texas Instruments |
2 / 52 page TL16PIR552 DUAL UART WITH DUAL IrDA AND 1284 PARALLEL PORT SLLS222A – DECEMBER 1995 – REVISED AUGUST 1996 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 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. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 PH PACKAGE (TOP VIEW) FAULT BUSY ACK TEST XIN GND XOUT TXRDY1 PINTR PDRQ CLK_OUT0 VCC IOCHRDY INTRPT0 IRSIN0 DCD0 RI0 SIN0 GND SOUT1 DTR1 RTS1 SIN1 DSR1 DCD1 CTS1 TXRDY0 BDO IRSIN1 RI1 CLK_OUT1 VCC IBM and PC/AT are trademarks of International Business Machines Corporation. |
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