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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AT90PWM3 датащи(PDF) 23 Page - ATMEL Corporation |
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AT90PWM3 датащи(HTML) 23 Page - ATMEL Corporation |
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23 / 361 page  23 4317J–AVR–08/10 AT90PWM2/3/2B/3B The calibrated Oscillator is used to time the EEPROM accesses. Table 6-2 lists the typical pro- gramming time for EEPROM access from the CPU. The following code examples show one assembly and one C function for writing to the EEPROM. The examples assume that interrupts are controlled (e.g. by disabling interrupts glob- ally) so that no interrupts will occur during execution of these functions. The examples also assume that no Flash Boot Loader is present in the software. If such code is present, the EEPROM write function must also wait for any ongoing SPM command to finish. Table 6-2. EEPROM Programming Time. Symbol Number of Calibrated RC Oscillator Cycles Typ Programming Time EEPROM write (from CPU) 26368 3.3 ms |
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