HD6417144 RENESAS [Renesas Technology Corp], HD6417144 Datasheet - Page 578

• Manufacturer Part Number: HD6417144
• Description: 32-Bit RISC Microcomputer SuperHTM RISC engine Family/SH7144 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

14. I
Rev.4.00 Mar. 27, 2008 Page 534 of 882
REJ09B0108-0400
Figure 14.30 Flowchart and Timing of the Execution of the Instruction that Sets the Start
2
C Bus Interface (IIC) Option
SCL
SDA
IRIC
Write 1 to BBSY and
transmission to ICDR
Clear IRIC in ICCR
0 to SCP of ICSR
Read the SCL pin
Write the data for
Set the start
condition?
Yes
SCL=Low?
Yes
Yes
[1] Tasting of IRIC
IRIC = 1?
IRIC=1?
ACK
Yes
No
No
No
No
[2] Testing of SCL=Low
Other processing
Condition for Re-Transmission
[1] Wait for completion of one-byte transfer.
[2] Decide whether or not SCL is low.
[3] Execuse the instruction that sets the start
[4] Confirm the start condition generation
[5] Set the data for transmission (slave address+R/W)
Note: Program so that steps 3 to 5 above are
condition for re-transmission.
[3] Start condition instruction
executed continuously.
issuance (re-transmission)
Start condition (re-transmission)
[4] Testing of IRIC
[5] Write to ICDR (transfer data)
bit7