ATTINY15 ATMEL [ATMEL Corporation], ATTINY15 Datasheet - Page 58

• Manufacturer Part Number: ATTINY15
• Manufacturer: ATMEL [ATMEL Corporation]

Table 25. High-voltage Serial Programming Instruction Set for ATtiny15L
Note:
58
Instruction
Read Lock
Bits
Read
Signature
Bytes
Read
Calibration
Byte
1. a = address high bits
ATtiny15L
b = address low bits
i = data in
o = data out
x = don’t care
1 = Lock Bit1
2 = Lock Bit2
3 = CKSEL0 Fuse
4 = CKSEL1 Fuse
5 = RSTDSBL Fuse
6 = SPIEN Fuse
7 = BODEN Fuse
8 = BODLEVEL Fuse
The Lock bits can only be cleared by executing a Chip Erase.
PB0
PB1
PB2
PB0
PB1
PB2
PB0
PB1
PB2
0_0000_0100_00
0_0100_1100_00
0_0000_1000_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_00bb_00
0_0000_0000_00
0_0111_1000_00
0_0000_1100_00
0_0000_0000_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_0110_1000_00
0_0000_0000_00
0_0111_1000_00
x_xxxx_21xx_xx
x_xxxx_xxxx_xx
x_xxxx_xxxx_xx
Instr.3
(1)
(Continued)
o_oooo_ooox_xx
o_oooo_ooox_xx
0_0000_0000_00
0_0110_1100_00
0_0000_0000_00
0_0111_1100_00
Instr.4
Operation Remarks
Reading 2, 1 = “0” means the
Lock bit is programmed
Repeat Instr.2 - Instr.4 for
each signature byte address
1187D–12/01