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RM0312 датащи(PDF) 165 Page - STMicroelectronics |
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RM0312 датащи(HTML) 165 Page - STMicroelectronics |
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165 / 275 page ![]() DocID022352 Rev 3 165/275 RM0312 8-bit basic timer (TIM4) 170 18.5 TIM4 registers 18.5.1 Control register 1 (TIM4_CR1) Address offset: 0x00 Reset value: 0x00 7 654 3210 ARPE Reserved OPM URS UDIS CEN rw rw rw rw rw Bit 7 ARPE: Auto-Reload Preload Enable. 0: TIM4_ARR register is not buffered through a preload register. It can be written directly. 1: TIM4_ARR register is buffered through a preload register. Bits 6:4 Reserved Bit 3 OPM: One Pulse Mode. 0: Counter is not stopped at update event 1: Counter stops counting at the next update event (clearing the CEN bit ). Bit 2 URS: Update Request Source. 0: When enabled, an update interrupt request is sent as soon as registers are updated (counter overflow) 1: When enabled, an update interrupt request is sent only when the counter reaches the overflow/underflow. Bit 1 UDIS: Update disable. 0: An Update event is generated as soon as a counter overflow occurs or a software update is generated. Buffered registers are then loaded with their preload values 1: An Update event is not generated, shadow registers keep their value (ARR, PSC). The counter and the prescaler are re-initialized if the UG bit is set. Bit 0 CEN: Counter enable. 0: Counter disable. 1: Counter enable. |
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