Rainbow Electronics ATmega103L - Manual (Page 104)

ATmega603/103
104
Note: 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
1 = Lock Bit 1
2 = Lock Bit 2
3 = SUT0 Fuse
4 = SUT1 Fuse
5 = SPIEN Fuse
6 = EESAVE Fuse
Table 45. Serial Programming Instruction Set
Instruction Instruction Format Operation
Byte 1 Byte 2 Byte 3 Byte 4
Programming Enable
1010 1100 0101 0011 xxxx xxxx xxxx xxxx Enable Serial Programming while
RESET is low.
Chip Erase 1010 1100 100x xxxx xxxx xxxx xxxx xxxx Chip Erase EEPROM and Flash.
Read Program Memory
0010 H000 aaaa 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 page memory at word
address b.
Write Program Memory
Page 0100 1100 aaaa aaaa bxxx xxxx xxxx xxxx Write Program Memory Page at
address a:b.
Read EEPROM Memory
1010 0000 xxxx aaaa bbbb bbbb oooo oooo Read data o from EEPROM
memory at address a:b.
Write EEPROM Memory
1100 0000 xxxx aaaa bbbb bbbb iiii iiii Write data i to EEPROM memory
at address a:b.
Read Lock Bits
0101 1000 xxxx xxxx xxxx xxxx xxxx x 21x Read Lock bits. ‘0’ = programmed,
‘1’ = unprogrammed.
Write Lock Bits
1010 1100 1111 1 211 xxxx xxxx xxxx xxxx Write Lock bits. Set bits 1,2 = ’0’ to
program Lock bits.
Read Fuse Bits
0101 0000 xxxx xxxx xxxx xxxx xx5x 6143 Read Fuse bits. ‘0’ = programmed,
‘1’ = unprogrammed.
Write Fuse Bits
1010 1100 1011 6143 xxxx xxxx xxxx xxxx Write Fuse bits. Set bit 6,4 ,3 = ’0’
to program, ‘1’ to unprogram.
Read Signature Byte
0011 0000 xxxx xxxx xxxx xxbb oooo oooo Read Signature Byte o at address
b.