Tim1/Tim8 Repetition Counter Register (Timx_Rcr) - ST STM32L4x6 Reference Manual

Advanced-control timers (TIM1/TIM8)
26.4.13

TIM1/TIM8 repetition counter register (TIMx_RCR)

Address offset: 0x30
Reset value: 0x0000
15 14 13
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Bits 15:0 REP[15:0]: Repetition counter value
These bits allow the user to set-up the update rate of the compare registers (i.e. periodic
transfers from preload to active registers) when preload registers are enable, as well as the
update interrupt generation rate, if this interrupt is enable.
Each time the REP_CNT related downcounter reaches zero, an update event is generated
and it restarts counting from REP value. As REP_CNT is reloaded with REP value only at the
repetition update event U_RC, any write to the TIMx_RCR register is not taken in account until
the next repetition update event.
It means in PWM mode (REP+1) corresponds to:
26.4.14 TIM1/TIM8 capture/compare register 1 (TIMx_CCR1)
Address offset: 0x34
Reset value: 0x0000
15 14 13
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Bits 15:0 CCR1[15:0]: Capture/Compare 1 value
If channel CC1 is configured as output:: CCR1 is the value to be loaded in the actual
capture/compare 1 register (preload value).
It is loaded permanently if the preload feature is not selected in the TIMx_CCMR1 register (bit
OC1PE). Else the preload value is copied in the active capture/compare 1 register when an
update event occurs.
The active capture/compare register contains the value to be compared to the counter
TIMx_CNT and signaled on OC1 output.
If channel CC1 is configured as input:: CR1 is the counter value transferred by the last input
capture 1 event (IC1).
834/1693
12 11 10 9
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the number of PWM periods in edge-aligned mode
the number of half PWM period in center-aligned mode.
12 11 10 9
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8 7 6
REP[15:0]
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8 7 6
CCR1[15:0]
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DocID024597 Rev 3
5 4 3 2
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5 4 3 2
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RM0351
1 0
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1 0
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