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STM32G474CB Datasheet(PDF) 34 Page - STMicroelectronics |
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STM32G474CB Datasheet(HTML) 34 Page - STMicroelectronics |
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34 / 232 page  Functional overview STM32G474xB STM32G474xC STM32G474xE 34/232 DS12288 Rev 1 3.21 Comparators (COMP) The STM32G474xB/xC/xE devices embed seven rail-to-rail comparators with programmable reference voltage (internal or external), hysteresis. The reference voltage can be one of the following: • External I/O • DAC output channels • Internal reference voltage or submultiple (1/4, 1/2, 3/4). All comparators can wake up from Stop mode, generate interrupts and breaks for the timers. 3.22 Operational amplifier (OPAMP) The STM32G474xB/xC/xE devices embed six operational amplifiers with external or internal follower routing and PGA capability. The operational amplifier features: • 15 MHz bandwidth • Rail-to-rail input/output • PGA with a non-inverting gain ranging of 2, 4, 8, 16, 32 or 64 or inverting gain ranging of -1, -3, -7, -15, -31 or -63 3.23 Random number generator (RNG) All devices embed an RNG that delivers 32-bit random numbers generated by an integrated analog circuit. 3.24 Timers and watchdogs The STM32G474xB/xC/xE devices include One High Resolution time, two advanced motor control timers, up to nine general-purpose timers, two basic timers, one low-power timer, two watchdog timers and a SysTick timer. The table below compares the features of the advanced motor control, general purpose and basic timers. Table 7. Timer feature comparison Timer type Timer Counter resolution Counter type Prescaler factor DMA request generation Capture/ compare channels Complementary outputs High resolution timer HRTIM 16-bit Up /1 /2 /4 (x2 x4 x8 x16 x32, with DLL) Yes 12 Yes Advanced motor control TIM1, TIM8, TIM20 16-bit Up, down, Up/down Any integer between 1 and 65536 Yes 4 4 General- purpose TIM2, TIM5 32-bit Up, down, Up/down Any integer between 1 and 65536 Yes 4 No |
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