Datasheet

309
2490R–AVR–02/2013
ATmega64(L)
Table 129. SPI Serial Programming Instruction Set
Instruction
Instruction Format
OperationByte 1 Byte 2 Byte 3 Byte 4
Programming Enable 1010 1100 0101 0011 xxxx xxxx xxxx xxxx Enable SPI Serial Programming
after RESET
goes low.
Chip Erase 1010 1100 100x xxxx xxxx xxxx xxxx xxxx Chip Erase EEPROM and Flash.
Read Program Memory 0010 H000 xaaa aaaa bbbb bbbb oooo oooo Read H (high or low) data o from
Program memory at word address
a:b.
Load Program Memory
Page
0100 H000 xxxx xxxx xbbb bbbb iiii iiii Write H (high or low) data i to
Program Memory page at word
address b. Data low byte must be
loaded before data high byte is
applied within the same address.
Write Program Memory
Page
0100 1100 xaaa aaaa bxxx xxxx xxxx xxxx Write Program Memory Page at
address a:b.
Read EEPROM Memory 1010 0000 xxxx xaaa bbbb bbbb oooo oooo Read data o from EEPROM
memory at address a:b.
Write EEPROM Memory 1100 0000 xxxx xaaa bbbb bbbb iiii iiii Write data i to EEPROM memory
at address a:b.
Read Lock Bits 0101 1000 0000 0000 xxxx xxxx xxoo oooo Read Lock bits. “0” = programmed,
“1” = unprogrammed. See Table
115 on page 290 for details.
Write Lock Bits 1010 1100 111x xxxx xxxx xxxx 11ii iiii Write Lock bits. Set bits = “0” to
program Lock bits. See Table 115
on page 290 for details.
Read Signature Byte 0011 0000 xxxx xxxx xxxx xxbb oooo oooo Read Signature Byte o at address
b.
Write Fuse Bits 1010 1100 1010 0000 xxxx xxxx iiii iiii Set bits = “0” to program, “1” to
unprogram. See Table 119 on page
292 for details.
Write Fuse High Bits 1010 1100 1010 1000 xxxx xxxx iiii iiii Set bits = “0” to program, “1” to
unprogram. See Table 118 on page
292 for details.
Write Extended Fuse Bits 1010 1100 1010 0100 xxxx xxxx xxxx xxii Set bits = “0” to program, “1” to
unprogram. See Table 119 on page
292 for details.
Read Fuse Bits 0101 0000 0000 0000 xxxx xxxx oooo oooo Read Fuse bits. “0” = programmed,
“1” = unprogrammed. See Table
119 on page 292 for details.