atmega3250v-8auatmega325v-8ai ATMEL Corporation, atmega3250v-8auatmega325v-8ai Datasheet - Page 282

• Manufacturer Part Number: atmega3250v-8auatmega325v-8ai
• Description: Atmega3250 8-bit Microcontroller With In-system Programmable Flash
• Manufacturer: ATMEL Corporation

Table 27-15. Serial Programming Instruction Set
282
Instruction/Operation
Read Lock bits
Read Signature Byte
Read Fuse bits
Read Fuse High bits
Read Extended Fuse Bits
Read Calibration Byte
Write Instructions
Write Program Memory Page
Write EEPROM Memory
Write EEPROM Memory Page (page access)
Write Lock bits
Write Fuse bits
Write Fuse High bits
Write Extended Fuse Bits
ATmega325/3250/645/6450
Notes:
If the LSB in RDY/BSY data byte out is ‘1’, a programming operation is still pending. Wait until
this bit returns ‘0’ before the next instruction is carried out.
Within the same page, the low data byte must be loaded prior to the high data byte.
After data is loaded to the page buffer, program the EEPROM page, see
1. Not all instructions are applicable for all parts
2. a = address
3. Bits are programmed ‘0’, unprogrammed ‘1’.
4. To ensure future compatibility, unused Fuses and Lock bits should be unprogrammed (‘1’) .
5. Refer to the correspondig section for Fuse and Lock bits, Calibration and Signature bytes and
6. See htt://www.atmel.com/avr for Application Notes regarding programming and programmers.
Page size.
Byte 1
$4C
$C0
$C2
$AC
$AC
$AC
$AC
$50
$38
$58
$30
$50
$58
0000 00aa
0000 0aaa
0000 00aa
0000 0aaa
adr MSB
Byte 2
$E0
$A0
$A8
$A4
$00
$00
$00
$08
$08
$00
/
/
Instruction Format
0000 000aa
aaaa aaaa
aaaa aa00
aaaa a000
adr LSB
Byte 3
$00
$00
$00
$00
$00
$00
$00
$00
$00
/
Figure
data byte out
data byte out
data byte out
data byte out
data byte out
data byte out
27-12.
data byte in
data byte in
data byte in
data byte in
data byte in
2570L–AVR–08/07
Byte4
$00
$00