ATMEGA2561V ATMEL [ATMEL Corporation], ATMEGA2561V Datasheet - Page 347
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ATMEGA2561V
Manufacturer Part Number
ATMEGA2561V
Description
8-bit Microcontroller with 64K/128K/256K Bytes In-System Programmable Flash
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.ATMEGA2561V.pdf
(449 pages)
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2549K–AVR–01/07
Table 158. BS2 and BS1 Encoding
,
Table 159. Pin Values Used to Enter Programming Mode
Table 160. XA1 and XA0 Enoding
Table 161. Command Byte Bit Encoding
BS2
0
1
1
XA1
Command Byte
0
0
1
1
1000 0000
0100 0000
0010 0000
0001 0000
0001 0001
0000 1000
0000 0100
0000 0010
0000 0011
BS1
1
0
1
PAGEL
XA1
XA0
BS1
Pin
XA0
Flash /
EEPROM
Address
High Byte
Extended High
Byte
Reserved
0
1
0
1
ATmega640/1280/1281/2560/2561
Action when XTAL1 is Pulsed
Load Flash or EEPROM Address (High or low address byte
determined by BS2 and BS1).
Load Data (High or Low data byte for Flash determined by BS1).
Load Command
No Action, Idle
Command Executed
Chip Erase
Write Fuse bits
Write Lock bits
Write Flash
Write EEPROM
Read Signature Bytes and Calibration byte
Read Fuse and Lock bits
Read Flash
Read EEPROM
Flash Data
Loading /
Reading
High Byte
Reserved
Reserved
Prog_enable[3]
Prog_enable[2]
Prog_enable[1]
Prog_enable[0]
Symbol
Fuse
Programming
High Byte
Extended Byte
Reserved
Value
Reading Fuse
and Lock Bits
Extended Fuse
Byte
Fuse High Byte
Lockbits
0
0
0
0
347
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