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ATtiny13A 数据表(PDF) 22 Page - ATMEL Corporation |
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ATtiny13A 数据表(HTML) 22 Page - ATMEL Corporation |
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22 / 174 page ![]() 22 8126D–AVR–11/09 ATtiny13A • Bit 0 – EERE: EEPROM Read Enable The EEPROM Read Enable Signal – EERE – is the read strobe to the EEPROM. When the cor- rect address is set up in the EEARL Register, the EERE bit must be written to one to trigger the EEPROM read. The EEPROM read access takes one instruction, and the requested data is available immediately. When the EEPROM is read, the CPU is halted for four cycles before the next instruction is executed. The user should poll the EEPE bit before starting the read opera- tion. If a write operation is in progress, it is neither possible to read the EEPROM, nor to change the EEARL Register. |
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