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C167CS Datasheet(PDF) 342 Page - Infineon Technologies AG |
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C167CS Datasheet(HTML) 342 Page - Infineon Technologies AG |
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342 / 517 page  C167CS Derivatives The Pulse Width Modulation Module User’s Manual 17-1 V2.0, 2000-07 17 The Pulse Width Modulation Module The Pulse Width Modulation (PWM) Module of the C167CS allows the generation of up to 4 independent PWM signals. These PWM signals can be generated within a wide range of output frequencies, which depends on: • the CPU clock frequency fCPU • the selected counter resolution ( fCPU / 1 or fCPU / 64) • the operating mode (edge/center aligned) • the required PWM resolution (1-bit … 16-bit) The maximum PWM output frequency in a real application is primarily determined by the PWM resolution which is required for that application. Figure 17-1 SFRs and Port Pins Associated with the PWM Module The Pulse Width Modulation Module consists of 4 independent PWM channels. Each channel has a 16-bit up/down counter PTx, a 16-bit period register PPx with a shadow latch, a 16-bit pulse width register PWx with a shadow latch, two comparators, and the necessary control logic. The operation of all four channels is controlled by two common control registers, PWMCON0 and PWMCON1, and the interrupt control and status is handled by one interrupt control register PWMIC, which is also common for all channels. E MCA04387 ODP7 DP7 P7 PP0 PW0 PP1 PW1 PP2 E PW2 PP3 E PW3 PT0 PT1 PWMCON0 PWMIC Ports & Direction Control Alternate Functions Data Registers Control Registers Control Registers and Interrupt Control ODP7 Port 7 Open Drain Control Register DP7 Port 7 Direction Control Register P7 Port 7 Data Register PWMIC PWM Interrupt Control Register PPx PWM Period Register x PWx PWM Pulse Width Register x PTx PWM Counter Register x PWMCONx PWM Control Register 0/1 PWMCON1 PT2 PT3 POUT0/P7.0 POUT1/P7.1 POUT2/P7.2 POUT3/P7.3 E E E E E E E |
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