HD6417320 RENESAS [Renesas Technology Corp], HD6417320 Datasheet - Page 704
HD6417320
Manufacturer Part Number
HD6417320
Description
Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6417320.pdf
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Section 19
19.4
The IrDA module can perform infrared communication conforming to IrDA 1.0 by connecting
infrared transmit/receive units. The serial communication interface unit includes a buffer in the
transmit unit and the receive unit, allowing CPU overhead to be reduced and continuous high-
speed communication to be performed.
The IrDA module modifies IrTx/IrRx transmit/receive data waveforms to satisfy the IrDA 1.0
specification for infrared communication.
In the IrDA 1.0 specification, communication is first performed at a speed of 9600 bps, and the
communication speed is changed. However, the communication rate cannot be automatically
changed in this module, so the communication speed should be confirmed, and the appropriate
speed set for this module by software.
19.4.1
The waveforms of a serial output signal (UART frame) from the SCIF are modified and the signal
is converted into the IR frame serial output signal by the IrDA module, as shown in figure 19.2.
When serial data is 0, a pulse of 3/16 the IR frame bit width is generated and output. When serial
data is 1, no pulse is output.
19.4.2
Received 3/16 IR frame bit-width pulses are demodulated and converted to a UART frame, as
shown in figure 19.2.
Demodulation to 0 is performed for pulse output, and demodulation to 1 is performed for no pulse
output.
Rev. 3.00 Jan. 18, 2008 Page 642 of 1458
REJ09B0033-0300
Operation
Transmitting
Receiving
Infrared Data Association Module (IrDA)
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