h8s-2635 Renesas Electronics Corporation., h8s-2635 Datasheet - Page 629

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

Section 15 I
Figure 15-7 Flowchart for Master Transmit Mode (Example)
No
No
No
No
No
2
Write transmit data to ICDR
Write transmit data to ICDR
C Bus Interface [Option] (Only for the H8S/2638, H8S/2639, and H8S/2630)
Read BBSY flag in ICCR
Read ACKB bit in ICSR
Clear IRIC flag in ICCR
Read IRIC flag in ICCR
Read ACKB bit in ICSR
Read IRIC flag in ICCR
Clear IRIC flag in ICCR
Read IRIC flag in ICCR
Clear IRIC flag in ICCR
and TRS = 1 (ICCR)
and SCP = 0 (ICCR)
Write BBSY = 0 and
Transmit complete?
Transmit mode?
Write BBSY = 1
SCP = 0 (ICCR)
Initial settings
Set MST = 1
(ACKB = 1?)
ACKB = 0?
BBSY = 0?
IRIC = 1?
IRIC = 1?
IRIC = 1?
Yes
Start
End
Yes
Yes
Yes
Yes
Yes
Yes
No
No
[1] Initial settings
[2] Determine status of SCL and SDA lines
[3] Set to master transmit mode
[4] Generate start condition
[5] Wait for start condition to be met
[6] Set 1st byte (slave address + R/W) transmit data
[7] Wait for end of 1 byte transmission
[8] Judge acknowledge signal from specified
[9] Set transmit data for 2nd byte onward
[10] Wait for end of 1 byte transmission
[11] Judge end of transmission
[12] Generate stop condition.
Master receive mode
(Perform ICDR write and IRIC flag clear
operations continuously)
slave device
(Perform ICDR write and IRIC flag clear
operations continuously)
Rev. 6.00 Feb 22, 2005 page 569 of 1484
REJ09B0103-0600