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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) 18 Page - ATMEL Corporation |
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AT43USB326 датащи(HTML) 18 Page - ATMEL Corporation |
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18 / 102 page  18 AT43USB326 3313D–USB–04/06 Figure 4. Oscillator and PLL Reset and Interrupt Handling The AT43USB326 provides 12 different interrupt sources with 4 separate reset vectors, each with a separate program vector in the program memory space. Nine of the interrupt sources share 2 interrupt reset vectors. These nine are the USB related interrupts. All interrupts are assigned individual enable bits which must be set (one) together with the I-bit in the status reg- ister in order to enable the interrupt. The lowest addresses in the program memory space are automatically defined as the Reset and Interrupt vectors. The complete list of vectors is shown in Table 6. The list also determines the priority levels of the different interrupts. The lower the address, the higher is the priority level. RESET has the highest priority, and next is INT0 – the USB Suspend and Resume Inter- rupt, etc. AT43USB326 XTAL1 XTAL2 LFT Y1 6.000 MHz U1 C2 0.01 UF C1 0.22 UF R1 100 Table 6. Reset and Interrupt Vectors Vector No. Program Address Source Interrupt Definition 1 $000 RESET External Reset, Power-on Reset and Watchdog Reset 2 $002 INT0 USB Suspend and Resume 8 $00E TIMER0, OVF Timer/Counter0 Overflow 13 $018 USB HW USB Hardware |
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