Inter-integrated circuit (I2C) interface RM0453
1098/1450 RM0453 Rev 5
34.6 I2C interrupts
The following table gives the list of I2C interrupt requests.
Table 237. I2C Interrupt requests
Interrupt
acronym
Interrupt
event
Event
flag
Enable
control bit
Interrupt clear
method
Exit
Sleep
mode
Exit
Stop 0,
Stop 1,
Stop 2
modes
Exit
Standby,
Shutdown
modes
I2C
I2C_EV
Receive buffer
not empty
RXNE RXIE
Read I2C_RXDR
register
Yes
No
No
Transmit buffer
interrupt status
TXIS TXIE
Write I2C_TXDR
register
Stop detection
interrupt flag
STOPF STOPIE Write STOPCF = 1
Transfer
complete reload
TCR
TCIE
Write I2C_CR2 with
NBYTES[7:0] ≠
0
Transfer
complete
TC
Write START = 1 or
STOP = 1
Address
matched
ADDR ADDRIE Write ADDRCF = 1 Yes
(1)
NACK reception NACKF NACKIE Write NACKCF = 1 No
I2C_ER
Bus error BERR
ERRIE
Write BERRCF = 1
Yes No No
Arbitration loss ARLO Write ARLOCF = 1
Overrun/
Underrun
OVR Write OVRCF = 1
PEC error PECERR Write PECERRCF = 1
Timeout/
t
LOW
error
TIMEOUT
Write
TIMEOUTCF = 1
SMBus alert ALERT Write ALERTCF = 1
1. The ADDR match event can wake up the device from Stop mode only if the I2C instance supports the Wake-up from Stop
mode feature. Refer to Section 34.3.
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