Rainbow Electronics AT90LS4433 - Manual (Page 96)

96
AT90S/LS4433
1042G–AVR–09/02
Note: 1. The signature bytes are not readable in lock mode 3, i.e., both Lock bits programmed.
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 = CKSEL0 Fuse
4 = CKSEL1 Fuse
5 = CKSEL2 Fuse
6 = BODEN Fuse
7 = BODLEVEL Fuse
8 = SPIEN Fuse
Table 35. Serial Programming Instruction Set
Instruction
Instruction Format
Operation Byte 1 Byte 2 Byte 3 Byte4
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 Flash and EEPROM
memory arrays.
Read Program Memory
0010 H000 xxxx xaaa bbbb bbbb oooo oooo Read H (high or low) data o from
program memory at word address
a:b.
Write Program Memory
0100 H000 xxxx xaaa bbbb bbbb iiii iiii Write H (high or low) data i to
program memory at word address
a:b.
Read EEPROM
Memory 1010 0000 xxxx xxxx bbbb bbbb oooo oooo Read data o from EEPROM memory
at address a:b.
Write EEPROM
Memory 1100 0000 xxxx xxxx bbbb bbbb iiii iiii Write data i to EEPROM memory at
address a:b.
Write Lock Bits
1010 1100 1111 1 21 1 xxxx xxxx xxxx xxxx Write Lock bits. Set bits 1,2 = “0” to
program Lock bits.
Read Lock Bits
0101 1000 xxxx xxxx xxxx xxxx xxxx x 21 x Read Lock bits. “0” = programmed,
“1” = unprogrammed.
Read Sigature Bytes 0011 0000 xxxx xxxx xxxx xxbb oooo oooo Read signature byte o at address b. (1)
Write Fuse Bits
1010 1100 1017 6543 xxxx xxxx xxxx xxxx Set bits 7 - 3 = “0” to program, “1” to
unprogram.
Read Fuse Bits
0101 0000 xxxx xxxx xxxx xxxx xx87 6543 Read Fuse bits. “0” = programmed,
“1” = unprogrammed.