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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AT43USB326 датащи(PDF) 20 Page - ATMEL Corporation |
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AT43USB326 датащи(HTML) 20 Page - ATMEL Corporation |
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20 / 102 page  20 AT43USB326 3313D–USB–04/06 Figure 5. AT43USB326 Interrupt Structure Reset Sources The AT43USB326 has four sources of reset: • Power-on Reset – The MCU is reset when the supply voltage is below the power-on reset threshold. • External Reset – The MCU is reset when a low level is present on the RESET pin for more than 50 ns. • Watchdog Reset – The MCU is reset when the watchdog timer period expires and the watchdog is enabled. • USB Reset – The AT43USB326 has a feature to separate the USB and microcontroller resets. This feature is enabled by setting the BUS INT EN, bit 3 of the SPRSIE register. A USB bus reset is defined as a SE0 (single ended zero) of at least 4 slow speed USB clock cycles received by Port0. The internal reset pulse to the USB hardware and microcontroller lasts for 24 oscillator periods. – Resets not separated: A USB bus reset will also reset the microcontroller. – Separated reset: A USB bus reset will only reset the USB hardware, while an interrupt to the microcontroller will be generated if the BUS INT MSK bit, bit 3 of SPRSMSK register, is also set. Suspend/Resume Register Suspend/Resume Interrupt Enable Register Suspend/Resume Interrupt Mask Register USB Interrupt Flag Register USB Interrupt Enable Register USB Interrupt Mask Register USB TIMER0 OVF INT0 RESET Microcontroller Interrupt Logic 13 8 2 1 SOF EOF2 FEP2 FEP1 FEP0 HEP0 FRMWUP RSM GLB SUSP |
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