SH7721 datasheet(701/1524 Pages) RENESAS

701 / 1524 page

Section 19

Infrared Data Association Module (IrDA)

IFIRDA0A_000020010900

Rev. 3.00 Jan. 18, 2008 Page 639 of 1458

REJ09B0033-0300

Section 19

Infrared Data Association Module (IrDA)

This LSI has an on-chip Infrared Data Association (IrDA) interface that is based on the IrDA 1.0

system and can perform infrared communication.

The IrDA is an optional module used for modulation and demodulation of signals for the SCIF_0

module, and it must always be used together with the SCIF_0 module.

19.1

Features

• Conforms to the IrDA 1.0 system

• Asynchronous serial communication

 Data length: 8 bits

 Stop bit length: 1 bit

 Parity bit: None

• On-chip 64-stage FIFO buffers for both transmit and receive operations

• On-chip baud rate generator with selectable bit rates

• Guard functions to protect the receiver during transmission

• Clock supply halted to reduce power consumption when not using the IrDA interface

Figure 19.1 shows a block diagram of the IrDA.

SCIF_0

TxD

Transfer clock

RxD

Switching IrDA/SCIF

IrDA

IrTx

IrRx

Modulation unit

Demodulation unit

[Legend]

SCIF: Serial communication interface with FIFO

Figure 19.1

Block Diagram of IrDA

SH7721 Datasheet(PDF) 701 Page - Renesas Technology Corp