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RM0312 数据表(PDF) 112 Page - STMicroelectronics |
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RM0312 数据表(HTML) 112 Page - STMicroelectronics |
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112 / 275 page  16-bit general purpose timer (TIM2/TIM3) RM0312 112/275 DocID022352 Rev 3 Figure 26. Counter update when ARPE=0 (ARR not preloaded) with prescaler = 2 Figure 27. Counter update when ARPE=1 (ARR preloaded), with prescaler = 1 CK_PSC 36 CNT_EN TIMER CLOCK = CK_CNT COUNTER REGISTER UPDATE INTERRUPT FLAG (UIF) COUNTER UNDERFLOW UPDATE EVENT (UEV) 35 34 33 32 31 30 2F 05 04 03 02 01 06 AUTO-RELOAD PRELOAD REGISTER FF 36 AUTO-RELOAD SHADOW REGISTER Write a new value in TIMx_ARR FF 36 New value transferred immediately in shadow register 00 FF CNT_EN TIMER CLOCK = CK_CNT COUNTER REGISTER UPDATE INTERRUPT FLAG (UIF) COUNTER UNDERFLOW UPDATE EVENT (UEV) FE FD FC FB 36 35 34 05 04 03 02 01 06 AUTO-RELOAD PRELOAD REGISTER FF 36 AUTO-RELOAD SHADOW REGISTER FF 36 Write a new value in TIMx_ARR CK_PSC New value transferred in shadow register on counter underflow 00 00 Cleared by software |
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