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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ST72325AR7-Auto датащи(PDF) 98 Page - STMicroelectronics |
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ST72325AR7-Auto датащи(HTML) 98 Page - STMicroelectronics |
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98 / 243 page  Obsolete Product(s) - Obsolete Product(s) PWM auto-reload timer (ART) ST72325xxx-Auto 98/243 Doc ID 13770 Rev 3 12.3.2 Counter access register (ARTCAR) 12.3.3 Auto-reload register (ARTARR) This register has two PWM management functions: – Adjusting the PWM frequency – Setting the PWM duty cycle resolution fINPUT / 8 1 MHz 0 1 1 fINPUT / 16 500 kHz 1 0 0 fINPUT / 32 250 kHz 1 0 1 fINPUT / 64 125 kHz 1 1 0 fINPUT / 128 62.5 kHz 1 1 1 Table 47. Prescaler selection for ART (continued) fCOUNTER With fINPUT = 8 MHz CC2 CC1 CC0 ARTCAR Reset value: 0000 0000 (00h) 76 543 21 0 CA[7:0] RW Table 48. ARTCAR register description Bit Name Function 7:0 CA[7:0] Counter Access Data These bits can be set and cleared either by hardware or by software. The ARTCAR register is used to read or write the auto-reload counter “on the fly” (while it is counting). ARTARR Reset value: 0000 0000 (00h) 76 543 21 0 AR[7:0] RW Table 49. ARTAAR register description Bit Name Function 7:0 AR[7:0] Counter Auto-Reload Data These bits are set and cleared by software. They are used to hold the auto-reload value which is automatically loaded in the counter when an overflow occurs. At the same time, the PWM output levels are changed according to the corresponding OPx bit in the PWMCR register. |
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