SH7261 datasheet(933/1348 Pages) RENESAS

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Section 20 IEBus

TM Controller (IEB) [R5S72612] [R5S72613]

Rev. 2.00 Sep. 07, 2007 Page 901 of 1312

REJ09B0320-0200

20.3.4

IEBus Master Unit Address Register 1 (IEAR1)

IEAR1 sets the lower four bits of the master unit address and communications mode. In master

communications, the master unit address becomes the master address field value. In slave

communications, the master unit address is compared with the received slave address field.

IEAR1 is initialized by a power-on reset or in deep standby.

76543210

Bit:

Initial value:

R/W:

00000000

R/W

IARL4

IMD

—

STE

Bit

Bit Name

Initial

Value

R/W

Description

7 to 4

IARL4

0000

R/W

Lower 4 Bits of IEBus Master Unit Address

Set the lower 4 bits of the master unit address. This

slave communications, the master unit address is

compared with the received slave address field

3, 2

IMD

R/W

IEBus Communications Mode

Set IEBus communications mode.

00: Communications mode 0

01: Communications mode 1

10: Communications mode 2

11: Setting prohibited



Reserved

This bit is always read as 0. The write value should

always be 0.

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