HD6432142 datasheet(552/1177 Pages) RENESAS

Il numero della parte	HD6432142

Spiegazioni elettronici	Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2100 Series

PDF	1177 Pages

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Produttore elettronici	RENESAS [Renesas Technology Corp]

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Section 16 I

2C Bus Interface [Option]

Rev. 4.00 Sep 27, 2006 page 508 of 1130

REJ09B0327-0400

Bit 2

BBSY

Description

Bus is free

(Initial value)

[Clearing condition]

When a stop condition is detected

1Bus is busy

[Setting condition]

When a start condition is detected

Bit 1—I

2C Bus Interface Interrupt Request Flag (IRIC): Indicates that the I2C bus interface has

issued an interrupt request to the CPU. IRIC is set to 1 at the end of a data transfer, when a slave

address or general call address is detected in slave receive mode, when bus arbitration is lost in

master transmit mode, and when a stop condition is detected. IRIC is set at different times

depending on the FS bit in SAR and the WAIT bit in ICMR. See section 16.3.6, IRIC Setting

Timing and SCL Control. The conditions under which IRIC is set also differ depending on the

setting of the ACKE bit in ICCR.

IRIC is cleared by reading IRIC after it has been set to 1, then writing 0 in IRIC.

When the DTC is used, IRIC is cleared automatically and transfer can be performed continuously

without CPU intervention.

HD6432142 Scheda tecnica(PDF) 552 Page - Renesas Technology Corp