SH7261 datasheet(911/1348 Pages) RENESAS

911 / 1348 page

Section 20 IEBus

TM Controller (IEB) [R5S72612] [R5S72613]

Rev. 2.00 Sep. 07, 2007 Page 879 of 1312

REJ09B0320-0200

(4)

Broadcast Communications

In normal transfer, a single master unit communicates with a single slave unit, so one-to-one

transfer or reception takes place. In broadcast communications, a single master unit communicates

with multiple slave units. Since there are multiple slave units, no acknowledgements are returned

from the slave units during communications.

A broadcast bit decides whether broadcast or normal communications is done. (For details of the

broadcast bit, see section 20.1.2 (1) (b), Broadcast Bit.

There are two types of broadcast communications.

(a)

Group broadcast communications

Broadcast communications is aimed at units with the same group number, meaning that those units

have the same upper four bits of the communications address.

(b)

General broadcast communications

Broadcast communications is aimed at all units regardless of group number.

Group broadcast and general broadcast communications are identified by a slave address. (For

details on the slave address, see section 20.1.2 (3), Slave Address Field.)

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