TL16PIR552 Datasheet, PDF (39/52 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
PRINCIPLES OF OPERATION
IR encoder and decoder (continued)
IR mode can be chosen through the use of SLR(6) with DLAB = 1. With DLAB = 1 and if SCR(6) = 1, IR mode
is selected. Built in multiplexers are used to choose the correct signal to input to the UART. Refer to Figure 28
for more detail.
SOUT
From UART
IR
tA ^Encoder tB
SOUT
0
IR_TX
M
U
X
1
SOUT _{To 232 Port}
or IR Module
SCR 6
SIN
To ACE
SIN
0
From 232 Port
M
U
X
IR
IRSIN _{From IR}
1
Decoder
Module
Figure 28. TL16PIR552 Mode Select
SOUT
UART
BDOUT
SIN
RCLK
TX
CLK
RX
CLK
MR
IR
Encoder
Transmitter
IR
Decoder
Receiver
IR_TX
IR_RX
Figure 29. TL16PIR552 IR Encoder/Decoder
For encoding, the IR_TX is selected when SCR6 is set to 1. This sends IR_TX on the device SOUT terminal.
This signal can be used as an input to any IR transceiver (see Figure 29).
For decoding, the IRSIN from the device (this can be connected to any IR transceiver) goes through the IR
decode block and then it is the input to the UART (see Figure 29).
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