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ATmega1284P Datasheet(PDF) 301 Page - ATMEL Corporation |
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ATmega1284P Datasheet(HTML) 301 Page - ATMEL Corporation |
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301 / 380 page  301 8059D–AVR–11/09 ATmega1284P 25.7.7 Reading the EEPROM The algorithm for reading the EEPROM memory is as follows (refer to ”Programming the Flash” on page 297 for details on Command and Address loading): 1. A: Load Command “0000 0011”. 2. G: Load Address High Byte (0x00 - 0xFF). 3. B: Load Address Low Byte (0x00 - 0xFF). 4. Set OE to “0”, and BS1 to “0”. The EEPROM Data byte can now be read at DATA. 5. Set OE to “1”. 25.7.8 Programming the Fuse Low Bits The algorithm for programming the Fuse Low bits is as follows (refer to ”Programming the Flash” on page 297 for details on Command and Data loading): 1. A: Load Command “0100 0000”. 2. C: Load Data Low Byte. Bit n = “0” programs and bit n = “1” erases the Fuse bit. 3. Give WR a negative pulse and wait for RDY/BSY to go high. |
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