HD6432142 datasheet(592/1177 Pages) RENESAS

Part #	HD6432142

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

PDF	1177 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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Section 16 I

2C Bus Interface [Option]

Rev. 4.00 Sep 27, 2006 page 548 of 1130

REJ09B0327-0400

Read SCL pin

Write transmit data to ICDR

Clear IRIC in ICSR

Write BBSY = 1,

SCP = 0 (ICSR)

IRIC = 1 ?

SCL = Low ?

Yes

Start condition

issuance?

[1]

[2]

[3]

[4]

[5]

Note: Program so that processing from [3] to [5] is

executed continuously.

[1] Wait for end of 1-byte transfer

[2] Determine whether SCL is low

[3] Issue restart condition instruction for retransmission

[4] Determine whether start condition is generated or not

[5] Set transmit data (slave address + R/

Other processing

Yes

IRIC = 1 ?

Yes

Start condition

(retransmission)

SCL

bit 7

ACK

IRIC

[1] IRIC determination

Determination

of SCL = low

[2]

[3] Start condition

instruction issuance

[4] IRIC

determination

[5]

SDA

ICDR write

(next transmit data)

Figure 16.19 Flowchart and Timing of Start Condition Instruction Issuance for

Retransmission

HD6432142 Datasheet(PDF) 592 Page - Renesas Technology Corp

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