ATMEGA2561V ATMEL [ATMEL Corporation], ATMEGA2561V Datasheet - Page 360

• Manufacturer Part Number: ATMEGA2561V
• Description: 8-bit Microcontroller with 64K/128K/256K Bytes In-System Programmable Flash
• Manufacturer: ATMEL [ATMEL Corporation]

Figure 148. Serial Programming Instruction example
Serial Programming
Characteristics
360
Byte 1
ATmega640/1280/1281/2560/2561
Load Program Memory Page (High/Low Byte)/
Load EEPROM Memory Page (page access)
Bit 15 B
Byte 2
Adr M M S S B
A
Byte 3
Adr LSB
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 Figure 148 on
page 360.
For characteristics of the Serial Programming module see “SPI Timing Characteristics”
on page 380.
Figure 149. Serial Programming Waveforms
SERIAL DATA OUTPUT
SERIAL CLOCK INPUT
SERIAL DATA INPUT
Page Offset
0
Serial Programming Instruction
SAMPLE
(MOSI)
(MISO)
Byte 4
(SCK)
Program Memory/
EEPROM Memory
Page Buffer
Page N-1
Page 0
Page 1
Page 2
MSB
MSB
Byte 1
Page Number
Bit 15 B
Byte 2
Write Program Memory Page/
Write EEPROM Memory Page
Adr MSB
Byte 3
A A dr r L L SB B
0
2549K–AVR–01/07
Byte 4
LSB
LSB