SH7721 datasheet(702/1524 Pages) RENESAS

702 / 1524 page

Section 19

Infrared Data Association Module (IrDA)

Rev. 3.00 Jan. 18, 2008 Page 640 of 1458

REJ09B0033-0300

19.2

Input/Output Pins

Table 19.1 shows the IrDA pin configuration.

Table 19.1

Pin Configuration

Name

Pin Name

I/O

Function

IrDA receive data

IrRX

Input

Receive data input

IrDA transmit data

IrTX

Output

Transmit data output

Note:

Clock input from the serial clock pin cannot be set in IrDA mode.

19.3

The IrDA has the following internal registers. Refer to section 37, List of Registers, for more

details on the addresses and states of these registers in each operating mode.

• IrDA mode register (SCIMR)

19.3.1

IrDA Mode Register (SCIMR)

SCIMR selects IrDA or SCIF mode and selects the IrDA output pulse width.

IrDA operates when the IRMOD bit is set to 1. When the IRMOD bit is cleared to 0, IrDA can

operate as an SCIF.

Bit

Bit Name

Initial Value R/W

Description

15 to 8



All 0

Reserved

These bits are always read as 0. The write value

should always be 0.

IRMOD

R/W

IrDA Mode

Selects whether this module operates as an

IrDA serial communication interface or as an

SCIF.

0: Operates as an SCIF

1: Operates as an IrDA

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