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ST72321 数据表(PDF) 60 Page - STMicroelectronics |
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ST72321 数据表(HTML) 60 Page - STMicroelectronics |
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60 / 189 page  ST72321 60/189 10.3 PWM AUTO-RELOAD TIMER (ART) 10.3.1 Introduction The Pulse Width Modulated Auto-Reload Timer on-chip peripheral consists of an 8-bit auto reload counter with compare/capture capabilities and of a 7-bit prescaler clock source. These resources allow five possible operating modes: – Generation of up to 4 independent PWM signals – Output compare and Time base interrupt – Up to two input capture functions – External event detector – Up to two external interrupt sources The three first modes can be used together with a single counter frequency. The timer can be used to wake up the MCU from WAIT and HALT modes. Figure 37. PWM Auto-Reload Timer Block Diagram OVF INTERRUPT EXCL CC2 CC1 CC0 TCE FCRL OIE OVF ARTCSR fINPUT PWMx PORT FUNCTION ALTERNATE OCRx COMPARE REGISTER PROGRAMMABLE PRESCALER 8-BIT COUNTER (CAR REGISTER) ARR REGISTER ICRx REGISTER LOAD OPx POLARITY CONTROL OEx PWMCR MUX fCPU DCRx REGISTER LOAD fCOUNTER ARTCLK fEXT ARTICx ICFx ICSx ICCSR LOAD ICx INTERRUPT ICIEx INPUT CAPTURE CONTROL |
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