General-purpose timer (TIM2) RM0453
882/1461 RM0453 Rev 1
Bit 9 CC1OF: Capture/Compare 1 overcapture flag
This flag is set by hardware only when the corresponding channel is configured in input
capture mode. It is cleared by software by writing it to ‘0’.
0: No overcapture has been detected.
1: The counter value has been captured in TIMx_CCR1 register while CC1IF flag was
already set
Bits 8:7 Reserved, must be kept at reset value.
Bit 6 TIF: Trigger interrupt flag
This flag is set by hardware on the TRG trigger event (active edge detected on TRGI input
when the slave mode controller is enabled in all modes but gated mode. It is set when the
counter starts or stops when gated mode is selected. It is cleared by software.
0: No trigger event occurred.
1: Trigger interrupt pending.
Bit 5 Reserved, must be kept at reset value.
Bit 4 CC4IF: Capture/Compare 4 interrupt flag
Refer to CC1IF description
Bit 3 CC3IF: Capture/Compare 3 interrupt flag
Refer to CC1IF description
Bit 2 CC2IF: Capture/Compare 2 interrupt flag
Refer to CC1IF description
Bit 1 CC1IF: Capture/compare 1 interrupt flag
This flag is set by hardware. It is cleared by software (input capture or output compare mode)
or by reading the TIMx_CCR1 register (input capture mode only).
0: No compare match / No input capture occurred
1: A compare match or an input capture occurred
If channel CC1 is configured as output: this flag is set when the content of the counter
TIMx_CNT matches the content of the TIMx_CCR1 register. When the content of
TIMx_CCR1 is greater than the content of TIMx_ARR, the CC1IF bit goes high on the
counter overflow (in up-counting and up/down-counting modes) or underflow (in down-
counting mode). There are 3 possible options for flag setting in center-aligned mode, refer to
the CMS bits in the TIMx_CR1 register for the full description.
If channel CC1 is configured as input: this bit is set when counter value has been captured
in TIMx_CCR1 register (an edge has been detected on IC1, as per the edge sensitivity
defined with the CC1P and CC1NP bits setting, in TIMx_CCER).
Bit 0 UIF: Update interrupt flag
This bit is set by hardware on an update event. It is cleared by software.
0: No update occurred
1: Update interrupt pending. This bit is set by hardware when the registers are updated:
At overflow or underflow and if UDIS=0 in the TIMx_CR1 register.
When CNT is reinitialized by software using the UG bit in TIMx_EGR register, if URS=0 and
UDIS=0 in the TIMx_CR1 register.
When CNT is reinitialized by a trigger event (refer to the synchro control register description),
if URS=0 and UDIS=0 in the TIMx_CR1 register.
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