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Os motores de busca de Datasheet de Componentes eletrônicos |
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Os motores de busca de Datasheet de Componentes eletrônicos |
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SPEAR320 Folha de dados(PDF) 25 Page - STMicroelectronics |
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SPEAR320 Folha de dados(HTML) 25 Page - STMicroelectronics |
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25 / 73 page  SPEAr320 Architecture overview Doc ID 16755 Rev 5 25/73 Two different modes of operation are available : ● Auto-reload mode, an interrupt source is activated, the counter is automatically cleared and then it restarts incrementing. ● Single-shot mode, an interrupt source is activated, the counter is stopped and the GPT is disabled. 3.25 PWM timers SPEAr320 provides 4 PWM timers. Main features: ● Prescaler to define the input clock frequency to each timer ● Programmable duty cycle from 0% to 100% ● Programmable pulse length ● APB slave interface for register programming 3.26 Watchdog timer The ARM watchdog module consists of a 32-bit down counter with a programmable timeout interval that has the capability to generate an interrupt and a reset signal on timing out. The watchdog module is intended to be used to apply a reset to a system in the event of a software failure. 3.27 RTC oscillator The RTC provides a 1-second resolution clock. This keeps time when the system is inactive and can be used to wake the system up when a programmed alarm time is reached. It has a clock trimming feature to compensate for the accuracy of the 32.768 kHz crystal and a secured time update. Main features: ● Time-of-day clock in 24 hour mode ● Calendar ● Alarm capability ● Isolation mode, allowing RTC to work even if power is not supplied to the rest of the device. |
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