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ATmega328P датащи(PDF) 305 Page - ATMEL Corporation |
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ATmega328P датащи(HTML) 305 Page - ATMEL Corporation |
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305 / 448 page ![]() 305 8161D–AVR–10/09 ATmega48PA/88PA/168PA/328P 5. E: Latch data (give PAGEL a positive pulse). K: Repeat 3 through 5 until the entire buffer is filled. L: Program EEPROM page 1. Set BS1 to “0”. 2. Give WR a negative pulse. This starts programming of the EEPROM page. RDY/BSY goes low. 3. Wait until to RDY/BSY goes high before programming the next page (See Figure 27-4 for signal waveforms). Figure 27-4. Programming the EEPROM Waveforms 27.7.6 Reading the Flash The algorithm for reading the Flash memory is as follows (refer to ”Programming the Flash” on page 302 for details on Command and Address loading): 1. A: Load Command “0000 0010”. 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 Flash word low byte can now be read at DATA. 5. Set BS1 to “1”. The Flash word high byte can now be read at DATA. 6. Set OE to “1”. 27.7.7 Reading the EEPROM The algorithm for reading the EEPROM memory is as follows (refer to ”Programming the Flash” on page 302 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”. RDY/BSY WR OE RESET +12V PAGEL BS2 0x11 ADDR. HIGH DATA ADDR. LOW DATA ADDR. LOW DATA XX XA1 XA0 BS1 XTAL1 XX AG B C E B C E L K |
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