Datasheet

205
ATmega323(L)
1457E–11/01
6. Enter JTAG instruction PROG_COMMANDS.
7. Repeat steps 3 to 6 until all data have been read.
Programming the EEPROM 1. Enter JTAG instruction PROG_COMMANDS.
2. Enable EEPROM write using programming instruction 4a.
3. Load address using programming instructions 4b and 4c.
4. Load data using programming instructions 4d.
5. Write the data using programming instruction 4e.
6. Poll for EEPROM write complete using programming instruction 4f, or wait for
t
WLRH
(refer to Table 67 on page 190).
7. Repeat steps 3 to 6 until all data have been programmed.
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.
Programming the Fuses 1. Enter JTAG instruction PROG_COMMANDS.
2. Enable Fuse write using programming instruction 6a.
3. Load data high byte using programming instructions 6b. A bit value of “0” will pro-
gram the corresponding fuse, a “1” will unprogram the fuse.
4. Write Fuse high byte using programming instruction 6c.
5. Poll for Fuse write complete using programming instruction 6d, or wait for t
WLRH
(refer to Table 67 on page 190).
6. Load data low byte using programming instructions 6e. A “0” will program the
fuse, a “1” will unprogram the fuse.
7. Write Fuse low byte using programming instruction 6f.
8. Poll for Fuse write complete using programming instruction 6g, or wait for t
WLRH
(refer to Table 67 on page 190).
Programming the Lock Bits 1. Enter JTAG instruction PROG_COMMANDS.
2. Enable Lock bit write using programming instruction 7a.
3. Load data using programming instructions 7b. A bit value of “0” will program the
corresponding lock bit, a “1” will leave the lock bit unchanged.
4. Write Lock bits using programming instruction 7c.
5. Poll for Lock bit write complete using programming instruction 7d, or wait for
t
WLRH
(refer to Table 67 on page 190).
Reading the Fuses and Lock
Bits
1. Enter JTAG instruction PROG_COMMANDS.
2. Enable Fuse/Lock bit read using programming instruction 8a.
3. To read all Fuses and Lock bits, use programming instruction 8e.
To only read Fuse high byte, use programming instruction 8b.
To only read Fuse low byte, use programming instruction 8c.
To only read Lock bits, use programming instruction 8d.