h8s-2138 Renesas Electronics Corporation., h8s-2138 Datasheet - Page 566

• Manufacturer Part Number: h8s-2138
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Section 16 I
Rev. 4.00 Jun 06, 2006 page 512 of 1004
REJ09B0301-0400
SCL
SDA
IRIC
Write transmit data to ICDR
Figure 16.19 Flowchart and Timing of Start Condition Instruction Issuance for
Clear IRIC in ICSR
Yes
Write BBSY=1,
Start condition
SCP=0 (ICSR)
Read SCL pin
[1] IRIC determination
Yes
SCL=Low ?
issuance?
IRIC=1 ?
IRIC=1 ?
ACK
2
C Bus Interface [H8S/2138 Group Option]
9
Yes
Yes
[2] Determination of SCL=Low
No
No
No
No
[3] Start condition instruction issuance
Other processing
[1]
[2]
[3]
[4]
[5]
Retransmission
(retransmission)
Start condition
[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/W)
Note: Program so that processing instruction from [3] to [5] is
executed continuously.
[4] IRIC determination
[5] ICDR write (next transmit data)
Data output
bit 7