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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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L9803 датащи(PDF) 61 Page - STMicroelectronics |
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L9803 датащи(HTML) 61 Page - STMicroelectronics |
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61 / 126 page  L9803 On-Chip Peripherals 61/126 5.3 PWM Generator 5.3.1 Introduction This PWM peripheral includes a 16-bit Pulse Width Modulator (PWM) and a programmable prescaler able to generate an internal clock with period as long as 128*T CPU. The repetition rate of the 16-Bit PWM output can be defined by a dedicated register (fCPU/CYREG); its resolution is defined by the internal clock as per the prescaler programming. Main Features – Programmable prescaler: fCPU divided by 2, 4, 8, 16, 32, 64 or 128. – 1 control register – 2 dedicated 16-bit registers for cycle and duty control – 1 dedicated maskable interrupt Procedure To use the pulse width modulation peripheral, the EN_PWM bit in CONREG register must be set. Load PS(2:0) in CONREG register to define the programmable prescaler. Load the CYREG register with the value defining the cycle length (in internal clock periods). The 16 bits of this register are separated in two registers: CYREGH and CYREGL. Timer1: 3E Timer2: 4E OCHR2 Reset Value MSB - ------ LSB - Timer1: 3F Timer2: 4F OCLR2 Reset Value MSB - ------ LSB - Timer1: 38 Timer2: 48 CHR Reset Value MSB 1111111 LSB 1 Timer1: 39 Timer2: 49 CLR Reset Value MSB 1111110 LSB 0 Timer1: 3A Timer2: 4A ACHR Reset Value MSB 1111111 LSB 1 Timer1: 3B Timer2: 4B ACLR Reset Value MSB 1111110 LSB 0 Timer1: 3C Timer2: 4C ICHR2 Reset Value MSB - ------ LSB - Timer1: 3D Timer2: 4D ICLR2 Reset Value MSB - ------ LSB - Table 10. 16-Bit Timer Register Map and Reset Values (continued) Address (Hex.) Register Name 76543210 |
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