R01UH0823EJ0100 Rev.1.00 Page 1121 of 1823
Jul 31, 2019
RX23W Group 35. I
2
C-bus Interface (RIICa)
BBSY Flag (Bus Busy Detection Flag)
The BBSY flag indicates whether the I
2
C-bus is occupied (bus busy state) or released (bus free state).
This bit is set to 1 when the SDA0 line changes from high to low under the condition of SCL0 line = high, assuming that
a start condition has been issued.
When the SDA0 line changes from low to high under the condition of SCL0 line = high, this bit is set to 0 after the bus
free time (specified in the ICBRL register) start condition is not detected, assuming that a stop condition has been issued.
[Setting condition]
When a start condition is detected
[Clearing conditions]
When the bus free time (specified in the ICBRL register) start condition is not detected after detecting a stop
condition
When 1 is written to the ICCR1.IICRST bit with the ICCR1.ICE bit set to 0 (RIIC reset)
To Next Page
Loading...
