ATmega162 datasheet(262/324 Pages) ATMEL

262 / 324 page

262

2513K–AVR–07/09

ATmega162/V

Programming the

EEPROM

Before programming the EEPROM a Chip Erase must be performed. See “Performing Chip

Erase” on page 260.

Enter JTAG instruction PROG_COMMANDS.

Enable EEPROM write using programming instruction 4a.

Load address high byte using programming instruction 4b.

Load address low byte using programming instruction 4c.

Load data using programming instructions 4d and 4e.

Repeat steps 4 and 5 for all data bytes in the page.

Write the data using programming instruction 4f.

Poll for EEPROM write complete using programming instruction 4g, or wait for t

WLRH

(refer to Table 107 on page 244).

Repeat steps 3 to 8 until all data have been programmed.

Note:

The PROG_PAGELOAD instruction can not be used when programming the EEPROM

Reading the EEPROM

Enter JTAG instruction PROG_COMMANDS.

Enable EEPROM read using programming instruction 5a.

Load address using programming instructions 5b and 5c.

Read data using programming instruction 5d.

Repeat steps 3 and 4 until all data have been read.

Note:

The PROG_PAGEREAD instruction can not be used when reading the EEPROM

Programming the

Fuses

Enter JTAG instruction PROG_COMMANDS.

Enable Fuse write using programming instruction 6a.

Load data low byte using programming instructions 6b. A bit value of “0” will program the

corresponding Fuse, a “1” will unprogram the Fuse.

Write Fuse extended byte using programming instruction 6c.

Poll for Fuse write complete using programming instruction 6d, or wait for t

WLRH (refer to

Table 107 on page 244).

Load data low byte using programming instructions 6e. A bit value of “0” will program the

corresponding Fuse, a “1” will unprogram the Fuse.

Write Fuse High byte using programming instruction 6f.

Poll for Fuse write complete using programming instruction 6g, or wait for t

WLRH (refer to

Table 107 on page 244).

Load data low byte using programming instructions 6h. A “0” will program the Fuse, a “1”

will unprogram the Fuse.

10. Write Fuse Low byte using programming instruction 6i.

11. Poll for Fuse write complete using programming instruction 6j, or wait for t

WLRH (refer to

Table 107 on page 244).

Programming the Lock

Bits

Enter JTAG instruction PROG_COMMANDS.

Enable Lock bit write using programming instruction 7a.

Load data using programming instructions 7b. A bit value of “0” will program the corre-

sponding Lock bit, a “1” will leave the Lock bit unchanged.

Write Lock bits using programming instruction 7c.

Poll for Lock bit write complete using programming instruction 7d, or wait for t

WLRH (refer

to Table 107 on page 244).

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