ATmega32A datasheet(288/352 Pages) ATMEL

288 / 352 page

288

8155B–AVR–07/09

ATmega32A

Figure 26-14. Programming Command Register

TDI

TDO

Flash

EEPROM

Fuses

Lock Bits

Figure 26-15. JTAG Programming Instruction Set

a = address high bits, b = address low bits, H = 0 – Low byte, 1 – High Byte, o = data out, i = data in, x = don’t care

Instruction

TDI sequence

TDO sequence

Notes

1a. Chip erase

0100011_10000000

0110001_10000000

0110011_10000000

xxxxxxx_xxxxxxxx

1b. Poll for chip erase complete

0110011_10000000

xxxxxox_xxxxxxxx

(2)

2a. Enter Flash Write

0100011_00010000

xxxxxxx_xxxxxxxx

2b. Load Address High Byte

0000111_aaaaaaaa

xxxxxxx_xxxxxxxx

(9)

2c. Load Address Low Byte

0000011_bbbbbbbb

xxxxxxx_xxxxxxxx

2d. Load Data Low Byte

0010011_iiiiiiii

xxxxxxx_xxxxxxxx

2e. Load Data High Byte

0010111_iiiiiiii

xxxxxxx_xxxxxxxx

2f. Latch Data

0110111_00000000

1110111_00000000

0110111_00000000

xxxxxxx_xxxxxxxx

(1)

2g. Write Flash Page

0110111_00000000

0110101_00000000

0110111_00000000

xxxxxxx_xxxxxxxx

(1)

2h. Poll for Page Write complete

0110111_00000000

xxxxxox_xxxxxxxx

(2)

3a. Enter Flash Read

0100011_00000010

xxxxxxx_xxxxxxxx

ATmega32A Datasheet(PDF) 288 Page - ATMEL Corporation

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