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10.3.13 Other cautions
After a reset, when changing from a mode in which no stop condition has been detected (the bus has not been
released) to a master device communication mode, first generate a stop condition to release the bus, then perform
master device communication.
When using multiple masters, it is not possible to perform master device communication when the bus has not
been released (when a stop condition has not been detected).
Use the following sequence for generating a stop condition.
(a) Set IIC clock select register (IICCL0).
(b) Set bit 7 (IICE) of the IIC control register (IICC0).
(c) Set bit 0 of IICC0.
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CHAPTER 10 SERIAL INTERFACE FUNCTION
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