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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STM32G0 датащи(PDF) 27 Page - STMicroelectronics |
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STM32G0 датащи(HTML) 27 Page - STMicroelectronics |
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27 / 135 page  DS12232 Rev 4 27/135 STM32G071x8/xB Functional overview 35 3.16 Voltage reference buffer (VREFBUF) 3.17 Comparators (COMP) Two embedded rail-to-rail analog comparators have programmable reference voltage (internal or external), hysteresis, speed (low for low-power) and output polarity. The reference voltage can be one of the following: • external, from an I/O • internal, from DAC • internal reference voltage (VREFINT) or its submultiple (1/4, 1/2, 3/4) The comparators can wake up the device from Stop mode, generate interrupts, breaks or triggers for the timers and can be also combined into a window comparator. 3.18 Timers and watchdogs The device includes an advanced-control timer, six general-purpose timers, two basic timers, two low-power timers, two watchdog timers and a SysTick timer. Table 7 compares features of the advanced-control, general-purpose and basic timers. When enabled, an embedded buffer provides the internal reference voltage to analog blocks (for example ADC) and to VREF+ pin for external components. The internal voltage reference buffer supports two voltages: • 2.048 V • 2.5 V An external voltage reference can be provided through the VREF+ pin when the internal voltage reference buffer is disabled. On some packages, the VREF+ pad of the silicon die is double-bonded with supply pad to common VDD/VDDA pin and so the internal voltage reference buffer cannot be used. Table 7. Timer feature comparison Timer type Timer Counter resolution Counter type Maximum operating frequency Prescaler factor DMA request generation Capture/ compare channels Comple- mentary outputs Advanced- control TIM1 16-bit Up, down, up/down 128 MHz Integer from 1 to 216 Yes 4 3 |
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