HD6433682 ETC, HD6433682 Datasheet - Page 346

• Manufacturer Part Number: HD6433682
• Description: Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Tiny Series
• Manufacturer: ETC

17.6
In master mode, this module has a possibility that high level period may be short in the two states
described below.
Therefore, it monitors SCL and communicates by bit with synchronization.
Figure 17.21 shows the timing of the bit synchronous circuit and table 17.4 shows the time when
SCL output changes from low to Hi-Z then SCL is monitored.
Table 17.4 Time for Monitoring SCL
Rev. 3.00, 05/03, page 316 of 472
CKS3
0
1
When SCL is driven to low by the slave device
When the rising speed of SCL is lowered by the load of the SCL line (load capacitance or pull-
up resistance)
Bit Synchronous Circuit
SCL monitor
timing reference
clock
Internal SCL
Figure 17.21 The Timing of the Bit Synchronous Circuit
CKS2
0
1
0
1
SCL
Time for Monitoring SCL
7.5 tcyc
19.5 tcyc
17.5 tcyc
41.5 tcyc
VIH