HD6432138SW datasheet(566/1061 Pages) RENESAS

Part #	HD6432138SW

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

PDF	1061 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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566 / 1061 page

Section 16 I

2C Bus Interface [H8S/2138 Group Option]

Rev. 4.00 Jun 06, 2006 page 512 of 1004

REJ09B0301-0400

IRIC=1 ?

SCL=Low ?

IRIC=1 ?

Write transmit data to ICDR

Write BBSY=1,

SCP=0 (ICSR)

Clear IRIC in ICSR

Read SCL pin

Start condition

issuance?

Other processing

[1]

[2]

[3]

[4]

[5]

Yes

[1] Wait for end of 1-byte transfer

[2] Determine wheter SCL is low

[3] Issue restart condition instruction for transmission

[4] Determine whether start condition is generated or not

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

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

executed continuously.

[5] ICDR write (next transmit data)

[4] IRIC determination

[3] Start condition instruction issuance

[2] Determination of SCL=Low

[1] IRIC determination

SCL

SDA

ACK

bit 7

Data output

IRIC

Start condition

(retransmission)

Figure 16.19 Flowchart and Timing of Start Condition Instruction Issuance for

Retransmission

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