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HD64F36049 Datasheet(PDF) 406 Page - Renesas Technology Corp

Part # HD64F36049
Description  Renesas 16-Bit Single-Chip Microcomputer H8 Family / H8/300H Tiny Series
PDF  562 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HD64F36049 Datasheet(HTML) 406 Page - Renesas Technology Corp

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Section 18 I
2C Bus Interface 2 (IIC2)
Rev. 3.00 Mar. 15, 2006 Page 374 of 526
REJ09B0060-0300
18.6
Bit Synchronous Circuit
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-
up resistance)
Therefore, it monitors SCL and communicates by bit with synchronization.
Figure 18.21 shows the timing of the bit synchronous circuit and table 18.4 shows the time when
SCL output changes from low to Hi-Z then SCL is monitored.
SCL
V
IH
SCL monitor
timing reference
clock
Internal SCL
Figure 18.21 Timing of Bit Synchronous Circuit
Table 18.4
Time for Monitoring SCL
CKS3
CKS2
Time for Monitoring SCL
0
7.5 tcyc
0
1
19.5 tcyc
0
17.5 tcyc
1
1
41.5 tcyc



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