r4f2426 Renesas Electronics Corporation., r4f2426 Datasheet - Page 981

• Manufacturer Part Number: r4f2426
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
• Manufacturer: Renesas Electronics Corporation.

16.6
In master mode,
• When SCL is driven to low by the slave device
• When the rising speed of SCL is lower by the load of the SCL line (load capacitance or pull-up
This module has a possibility that high level period may be short in the two states described
above. Therefore it monitors SCL and communicates by bit with synchronization. Figure 16.18
shows the timing of the bit synchronous circuit and table 16.4 shows the time when SCL output
changes from low to Hi-Z then SCL is monitored.
Table 16.4 Time for monitoring SCL
CKS3
0
1
resistance)
Bit Synchronous Circuit
SCL monitor
timing reference
clock
Internal SCL
SCL
CKS2
0
1
0
1
Figure 16.18 Timing of the Bit Synchronous Circuit
Time for monitoring SCL
7.5 tcyc
19.5 tcyc
17.5 tcyc
41.5 tcyc
VIH
Rev. 1.00 Sep. 19, 2008 Page 953 of 1270
Section 16 I
2
C Bus Interface 2 (IIC2)
REJ09B0466-0100