Rainbow Electronics AT90LS2343 - Manual (Page 41)

41
AT90S/LS2323/2343
1004D–09/01
Note: a = address high bits
b = address low bits
i = data in
o = data out
x = don’t care
1 = Lock Bit1
2 = Lock Bit2
F = FSTRT Fuse
R = RCEN Fuse
S = SPIEN Fuse
Read Fuse
and Lock Bits
(AT90S/
LS2323)
PB0
PB1
PB2
0_0000_0100_00
0_0100_1100_00
x_xxxx_xxxx_xx
0_0000_0000_00
0_0111_1000_00
x_xxxx_xxxx_xx
0_0000_0000_00
0_0111_1100_00
1_2Sxx_xxRx_xx
Reading 1, 2, S, R = “0” means
the Fuse/Lock bit is
programmed.
Read Fuse
and Lock Bits
(AT90S/
LS2343)
PB0
PB1
PB2
0_0000_0100_00
0_0100_1100_00
x_xxxx_xxxx_xx
0_0000_0000_00
0_0111_1000_00
x_xxxx_xxxx_xx
0_0000_0000_00
0_0111_1100_00
1_2Sxx_xxRx_xx
Reading 1, 2, S, R = “0” means
the Fuse/Lock bit is
programmed.
Read
Signature
Bytes PB0
PB1
PB2
0_0000_1000_00
0_0100_1100_00
x_xxxx_xxxx_xx
0_0000_00bb_00
0_0000_1100_00
x_xxxx_xxxx_xx
0_0000_0000_00
0_0110_1000_00
x_xxxx_xxxx_xx
0_0000_0000_00
0_0110_1100_00
o_oooo_ooox_xx
Repeat Instr.2 - Instr.4 for each
signature byte address.
Table 16. High-voltage Serial Programming Instruction Set (Continued)
Instruction
Instruction Format
Operation Remarks Instr.1 Instr.2 Instr.3 Instr.4