h8s-2635 Renesas Electronics Corporation., h8s-2635 Datasheet - Page 655

• Manufacturer Part Number: h8s-2635
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Notes on Start Condition Issuance for Retransmission
Figure 15-22 shows the timing of start condition issuance for retransmission, and the timing
for subsequently writing data to ICDR, together with the corresponding flowchart.
Figure 15-22 Flowchart and Timing of Start Condition Instruction Issuance for
Write transmit data to ICDR
Section 15 I
SDA
IRIC
SCL
Clear IRIC in ICSR
[1] IRIC determination
Start condition
Write BBSY = 1,
SCP = 0 (ICSR)
Read SCL pin
Read SCL pin
SCL = High ?
SCL = Low ?
IRIC = 1 ?
issuance?
Yes
Yes
Yes
Yes
ACK
2
C Bus Interface [Option] (Only for the H8S/2638, H8S/2639, and H8S/2630)
No
No
No
No
[2]
Other processing
Determination
of SCL = low
[1]
[2]
[3]
[4]
[5]
Retransmission
[3] Start condition
instruction issuance
Note: Program so that processing from [3] to [5] is
[1] Wait for end of 1-byte transfer
[2] Determine whether SCL is low
[3] Issue restart condition instruction for retransmission
[4] Determine whether SCL is high
[5] Set transmit data (slave address + R/W)
[4] Determination
executed continuously.
(retransmission)
of SCL = high
Rev. 6.00 Feb 22, 2005 page 595 of 1484
Start condition
[5] ICDR write
Bit 7
REJ09B0103-0600