SH7721 datasheet(705/1524 Pages) RENESAS

Part #	SH7721

Description	Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series

PDF	1524 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

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Section 19

Infrared Data Association Module (IrDA)

Rev. 3.00 Jan. 18, 2008 Page 643 of 1458

REJ09B0033-0300

UART frame

Start bit

IR frame

Start bit

Bit cycle

3/16-bit cycle

pulse width

UART frame

Data

IR frame

Data

Receive

Transmit

Stop bit

Figure 19.2

Transmit/Receive Operation

19.4.3

Data Format Specification

The data format of UART frames used for IrDA communication must be specified by the SCIF_0

registers. The UART frame has eight data bits, no parity bit, and one stop bit.

IrDA communication is performed in asynchronous mode, and this mode must also be specified

by the SCIF_0 registers. The sampling rate must be set to 1/16.

When using IrDA, set the SCIF_0 operating clock by setting the CKE1 and CKE0 bits in the serial

control register to 01.

The IrDA communication rate is the same as the SCIF_0 bit rate, which is specified by the

SCIF_0 registers.

For details on SCIF_0 registers, refer to section 18, Serial Communication Interface with FIFO

(SCIF).

SH7721 Datasheet(PDF) 705 Page - Renesas Technology Corp