attiny167-esxz ATMEL Corporation, attiny167-esxz Datasheet - Page 216

• Manufacturer Part Number: attiny167-esxz
• Description: 8-bit Avr 8-bit Microcontroller Microcontroller With 16k Bytes In-system Programmable Flash And Lin Controller
• Manufacturer: ATMEL Corporation

21. Memory Programming
21.1
21.2
216
Program and Data Memory Lock Bits
Fuse Bits
ATtiny167
The ATtiny167 provides two Lock bits which can be left unprogrammed (“1”) or can be pro-
grammed (“0”) to obtain the additional features listed in
erased to “1” with the Chip Erase command. The ATtiny167 has no separate Boot Loader
section.
Table 21-1.
Note:
Table 21-2.
Notes:
The ATtiny167 has three Fuse bytes.
functionality of all the fuses and how they are mapped into the Fuse bytes.
The SPM instruction is enabled for the whole Flash if the SELFPRGEN fuse is programmed
(“0”), otherwise it is disabled.
LB Mode
1
2
3
Lock Bit Byte
Memory Lock Bits
1. “1” means unprogrammed, “0” means programmed.
1. Program the Fuse bits before programming the LB1 and LB2.
2. “1” means unprogrammed, “0” means programmed
LB2
LB1
Lock Bit Byte
Lock Bit Protection Modes
LB2
1
1
0
LB1
1
0
0
(1)
Bit No
7
6
5
4
3
2
1
0
Protection Type
No memory lock features enabled.
Further programming of the Flash and EEPROM is disabled in
Parallel and Serial Programming mode. The Fuse bits are locked in
both Serial and Parallel Programming mode.
Further programming and verification of the Flash and EEPROM is
disabled in Parallel and Serial Programming mode. The Fuse bits
are locked in both Serial and Parallel Programming mode.
Table
(1)(2)
Description
–
–
–
–
–
–
Lock bit
Lock bit
21-3,
Table 21-4
Table
&
21-2. The Lock bits can only be
Table 21-5
Default Value
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
(1)
describe briefly the
7728A–AUTO–07/08
(1)