at90s2323 ATMEL Corporation, at90s2323 Datasheet - Page 41

• Manufacturer Part Number: at90s2323
• Description: 8-bit Microcontroller With 2k Bytes Of In-system Programmable Flash At90s2323 At90ls2323 At90s2343 At90ls2343
• Manufacturer: ATMEL Corporation

Table 16. High-voltage Serial Programming Instruction Set (Continued)
Note:
1004D–09/01
Instruction
Read Fuse
and Lock Bits
(AT90S/
LS2323)
Read Fuse
and Lock Bits
(AT90S/
LS2343)
Read
Signature
Bytes
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
PB0
PB1
PB2
PB0
PB1
PB2
PB0
PB1
PB2
0_0000_0100_00
0_0100_1100_00
0_0000_0100_00
0_0100_1100_00
0_0000_1000_00
0_0100_1100_00
x_xxxx_xxxx_xx
x_xxxx_xxxx_xx
x_xxxx_xxxx_xx
Instr.1
0_0000_0000_00
0_0111_1000_00
0_0000_0000_00
0_0111_1000_00
0_0000_00bb_00
0_0000_1100_00
x_xxxx_xxxx_xx
x_xxxx_xxxx_xx
x_xxxx_xxxx_xx
Instr.2
Instruction Format
0_0000_0000_00
0_0111_1100_00
0_0000_0000_00
0_0111_1100_00
0_0000_0000_00
0_0110_1000_00
1_2Sxx_xxRx_xx
1_2Sxx_xxRx_xx
x_xxxx_xxxx_xx
Instr.3
o_oooo_ooox_xx
0_0000_0000_00
0_0110_1100_00
Instr.4
AT90S/LS2323/2343
Operation Remarks
Reading 1, 2, S, R = “0” means
the Fuse/Lock bit is
programmed.
Reading 1, 2, S, R = “0” means
the Fuse/Lock bit is
programmed.
Repeat Instr.2 - Instr.4 for each
signature byte address.
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