Table 237. I2C Interrupt Requests - STMicroelectronics STM32WL5 Series Reference Manual

Inter-integrated circuit (I2C) interface
34.6 I2C interrupts
The following table gives the list of I2C interrupt requests.
Interrupt Interrupt
acronym event
Receive buffer
not empty
Transmit buffer
interrupt status
Stop detection
interrupt flag
I2C_EV Transfer
complete reload
Transfer
complete
Address
I2C
matched
NACK reception
Bus error
Arbitration loss
Overrun/
Underrun
I2C_ER
PEC error
Timeout/
t error
LOW
SMBus alert
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
1098/1450

Table 237. I2C Interrupt requests

Event
flag control bit
RXNE
TXIS
STOPF
TCR
TC
ADDR
NACKF
BERR
ARLO
OVR
PECERR
TIMEOUT
ALERT
Section 34.3.
Enable Interrupt clear
method
Read I2C_RXDR
RXIE
register
Write I2C_TXDR
TXIE
register
STOPIE Write STOPCF = 1
Write I2C_CR2 with
NBYTES[7:0] ≠ 0
TCIE
Write START = 1 or
STOP = 1
ADDRIE Write ADDRCF = 1
NACKIE Write NACKCF = 1
Write BERRCF = 1
Write ARLOCF = 1
Write OVRCF = 1
ERRIE
Write PECERRCF = 1
Write
TIMEOUTCF = 1
Write ALERTCF = 1
RM0453 Rev 5
RM0453
Exit
Exit
Exit Stop 0,
Standby,
Sleep Stop 1,
Shutdown
mode Stop 2
modes
modes
No
Yes No
(1)
Yes
No
Yes No No