Datasheet

3. Load the page address using programming instructions 3b and 3c. PCWORD (refer to table
Command Byte Bit Coding in section Parallel Programming Parameters, Pin Mapping, and
Commands) is used to address within one page and must be written as 0.
4. Enter JTAG instruction PROG_PAGEREAD.
5. Read the entire page by shifting out all instruction words in the page, starting with the LSB of the
first instruction in the page and ending with the MSB of the last instruction in the page. Remember
that the first 8 bits shifted out should be ignored.
6. Enter JTAG instruction PROG_COMMANDS.
7. Repeat steps 3 to 6 until all data have been read.
Related Links
Parallel Programming Characteristics on page 421
31.10.19. Programming the EEPROM
Before programming the EEPROM a Chip Erase must be performed. See Performing Chip Erase on page
410.
1. Enter JTAG instruction PROG_COMMANDS.
2. Enable EEPROM write using programming instruction 4a.
3. Load address high byte using programming instruction 4b.
4. Load address low byte using programming instruction 4c.
5. Load data using programming instructions 4d and 4e.
6. Repeat steps 4 and 5 for all data bytes in the page.
7. Write the data using programming instruction 4f.
8. Poll for EEPROM write complete using programming instruction 4g, or wait for t
WLRH
(refer to table
Parallel Programming Characteristics, VCC = 5V ±10% in chapter Parallel Programming
Characteristics).
9. Repeat steps 3 to 8 until all data have been programmed.
Note that the PROG_PAGELOAD instruction can not be used when programming the EEPROM
Related Links
Parallel Programming Characteristics on page 421
Parallel Programming Characteristics on page 421
31.10.20. Reading the EEPROM
1. Enter JTAG instruction PROG_COMMANDS.
2. Enable EEPROM read using programming instruction 5a.
3. Load address using programming instructions 5b and 5c.
4. Read data using programming instruction 5d.
5. Repeat steps 3 and 4 until all data have been read.
Note that the PROG_PAGEREAD instruction can not be used when reading the EEPROM
31.10.21. Programming the Fuses
1. Enter JTAG instruction PROG_COMMANDS.
2. Enable Fuse write using programming instruction 6a.
3. Load data byte using programming instructions 6b. A bit value of “0” will program the corresponding
fuse, a “1” will unprogram the fuse.
4. Write Extended Fuse byte using programming instruction 6c.
Atmel ATmega64A [DATASHEET]
Atmel-8160E-ATmega64A_Datasheet_Complete-09/2015
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