HD6432160 RENESAS [Renesas Technology Corp], HD6432160 Datasheet - Page 499

• Manufacturer Part Number: HD6432160
• Description: Hitachi 16-Bit Single-Chip Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

Note: This restriction on usage can be canceled by setting the FNC1 and FNC0 bits to 1 in
Figure 16.31 Flowchart for Start Condition Issuance Instruction for Retransmission and
IRIC
SDA
SCL
Figure 16.31 shows the timing of start condition issuance for retransmission, and the timing for
subsequently writing data to ICDR, together with the corresponding flowchart. Write the
transmit data to ICDR after the start condition for retransmission is issued and then the start
condition is actually generated.
ICXR.
[1] IRIC determination
Write transmit data to ICDR
Clear IRIC in ICSR
Yes
Yes
SCP = 0 (ICSR)
ACK
Set BBSY = 1,
Read SCL pin
Start condition
SCL = Low?
IRIC = 1?
issuance?
IRIC = 1?
[2] Determination of SCL = Low
9
Yes
Yes
No
No
No
No
[3] (Retransmission) Start condition instruction issuance
Other processing
[1]
[2]
[3]
[4]
[5]
Timing
Start condition generation
(retransmission)
[4] IRIC determination
[1] Wait for end of 1-byte transfer
[2] Determine whether SCL is low
[3] Issue start condition instruction for retransmission
[4] Determine whether start condition is generated or not
[5] Set transmit data (slave address + R/ )
Note:* Program so that processing from [3] to [5]
[5] ICDR write (transmit data)
is executed continuously.
Rev. 2.0, 08/02, page 459 of 788
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