TL16CP754C Datasheet, PDF (40/49 Pages) Texas Instruments – QUAD UARTS WITH 64-BYTE FIFO

TL16CP754C, TL16CM754C, TL16C754C
SLLS644E – DECEMBER 2007 – REVISED MAY 2010
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TSR
Loopback
RSR
UART
Figure 25. RS-485 Application Example 1
TX
DTR
RX
RS-485 XCVR
DEN
REN
48SEN
RCVEN
Figure 26. RS-485 Application Example 2
RS-485 BUS
IrDA Overview
Receive Shift Register
Transmit Shift Register
IREN
RCVEN
Int_Tx
Tx
Int_Rx
Rx
IrDA Converter
To Optoelectronic
LED
From
Optoelectronic
Pin Diode
Baud Clock
Reset
Figure 27. IrDA Mode
The infrared data association (IrDA) defines several protocols for sending and receiving serial infrared data,
including rates of 115.2 kbps, 0.576 Mbps, 1.152 Mbps, and 4 Mbps. The low rate of 115.2 kbps was specified
first and the others must maintain downward compatibility with it. At the 115.2 kbps rate, the protocol
implemented in the hardware is fairly simple. It primarily defines a serial infrared data word to be surrounded by a
start bit equal to 0 and a stop bit equal to 1. Individual bits are encoded or decoded the same whether they are
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