UM0306 Inter-integrated circuit (I2C) interface
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Bit 1
BUSY: Bus Busy
0: No communication on the bus
1: Communication ongoing on the bus
– Set by hardware on detection of SDA or SCL low
– cleared by hardware on detection of a Stop condition.
It indicates a communication in progress on the bus. This information is still
updated when the interface is disabled (PE=0).
Bit 0
MSL: Master/Slave
0: Slave Mode
1: Master Mode
– Set by hardware as soon as the interface is in Master mode (SB=1).
– Cleared by hardware after detecting a Stop condition on the bus or a loss of
arbitration (ARLO=1), or by hardware when PE=0.