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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STM8AL3136 датащи(PDF) 22 Page - STMicroelectronics |
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STM8AL3136 датащи(HTML) 22 Page - STMicroelectronics |
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22 / 124 page  Functional overview STM8AL313x/4x/6x STM8AL3L4x/6x 22/124 DocID18474 Rev 7 3.13.3 8-bit basic timer 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 or for DAC trigger generation. 3.14 Watchdog timers The watchdog system is based on two independent timers providing maximum security to the applications. 3.14.1 Window watchdog timer The window watchdog (WWDG) is used to detect the occurrence of a software fault, usually generated by external interferences or by unexpected logical conditions, which cause the application program to abandon its normal sequence. 3.14.2 Independent watchdog timer The independent watchdog peripheral (IWDG) can be used to resolve processor malfunctions due to hardware or software failures. It is clocked by the internal LSI RC clock source, and thus stays active even in case of a CPU clock failure. 3.15 Beeper The beeper function outputs a signal on the BEEP pin for sound generation. The signal is in the range of 1, 2 or 4 kHz. 3.16 Communication interfaces 3.16.1 SPI The serial peripheral interface (SPI1) provides half/ full duplex synchronous serial communication with external devices. • Maximum speed: 8 Mbit/s (fSYSCLK/2) both for master and slave • Full duplex synchronous transfers • Simplex synchronous transfers on 2 lines with a possible bidirectional data line • Master or slave operation - selectable by hardware or software • Hardware CRC calculation • Slave/master selection input pin Note: SPI1 can be served by the DMA1 Controller. |
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