HD6417320 RENESAS [Renesas Technology Corp], HD6417320 Datasheet - Page 738

• Manufacturer Part Number: HD6417320
• Description: Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 20
20.6
In master mode, this module has a possibility that high level period may be short in the two states
described below.
• 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-
Therefore, it monitors SCL and communicates by bit with synchronization.
Figure 20.21 shows the timing of the bit synchronous circuit and table 20.4 shows the time when
SCL output changes from low to Hi-Z then SCL is monitored.
Table 20.4 Time for Monitoring SCL
Rev. 3.00 Jan. 18, 2008 Page 676 of 1458
REJ09B0033-0300
CKS3
0
1
up resistance)
Bit Synchronous Circuit
I
2
C Bus Interface (IIC)
SCL monitor
timing reference
clock
Internal SCL
Figure 20.18
CKS2
0
1
0
1
SCL
The Timing of the Bit Synchronous Circuit
Time for Monitoring SCL
7.5 tpcyc
19.5 tpcyc
17.5 tpcyc
41.5 tpcyc
VIH