The I²C controller provides a 14-bit time-out counter to handle I²C bus hang-up. If the I²C bus is hung up, it causes I2CSTATUS and the flag SI not updated for a period, and the 14-bit time-out counter may overflow and acknowledge CPU the I²C interrupt. Refer to the following figure for the 14-bit time-out counter. User may write 1 to clear TIF to 0 and reset I²C.

FAQ50

For example, if Pclk is 1 MHz, the time-out value is 1us*214= 16384us.

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Applications:
Function:	Peripherals,Connectivity,I2C

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How to handle I2C bus hang-up in slave mode? Issue Date：2015-03-18

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