HD64336901G Renesas Technology, HD64336901G Datasheet - Page 282

• Manufacturer Part Number: HD64336901G
• Description: (HD64xxx Series) 16-BIT MICROCONTROLLER
• Manufacturer: Renesas Technology

15.6
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 15.21 shows the timing of the bit synchronous circuit and table 15.4 shows the time when
SCL output changes from low to Hi-Z then SCL is monitored.
Table 15.4 Time for Monitoring SCL
Rev. 1.00, 11/03, page 254 of 376
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
SCL
0
1
0
1
CKS2
Figure 15.21 Timing of Bit Synchronous Circuit
Time for Monitoring SCL
7.5 tcyc
19.5 tcyc
17.5 tcyc
41.5 tcyc
V
IH