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STM8L051F3 Datasheet(PDF) 19 Page - STMicroelectronics |
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STM8L051F3 Datasheet(HTML) 19 Page - STMicroelectronics |
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19 / 96 page  DS9178 Rev 4 19/96 STM8L051F3 Functional overview 41 3.9 System configuration controller and routing interface The system configuration controller provides the capability to remap some alternate functions on different I/O ports. TIM4 and ADC1 DMA channels can also be remapped. The highly flexible routing interface controls the routing of internal analog signals to ADC1 and the internal reference voltage VREFINT. 3.10 Timers STM8L051F3 contains two 16-bit general purpose timers (TIM2 and TIM3) and one 8-bit basic timer (TIM4). All the timers can be served by DMA1. Table 2 compares the features of the advanced control, general-purpose and basic timers. 3.10.1 16-bit general purpose timers (TIM2, TIM3) • 16-bit autoreload (AR) up/down-counter • 7-bit prescaler adjustable to fixed power of 2 ratios (1…128) • 2 individually configurable capture/compare channels • PWM mode • Interrupt capability on various events (capture, compare, overflow, break, trigger) • Synchronization with other timers or external signals (external clock, reset, trigger and enable) 3.10.2 8-bit basic timer (TIM4) The 8-bit timer consists of an 8-bit up auto-reload counter driven by a programmable prescaler. It can be used for timebase generation with interrupt generation on timer overflow. 3.11 Watchdog timers The watchdog system is based on two independent timers providing maximum security to the applications. Table 2. Timer feature comparison Timer Counter resolution Counter type Prescaler factor DMA1 request generation Capture/compare channels Complementary outputs TIM2 16-bit up/down Any power of 2 from 1 to 128 Yes 2 None TIM3 2 TIM4 8-bit up Any power of 2 from 1 to 32768 0 |
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