ATMEGA48V_11 ATMEL [ATMEL Corporation], ATMEGA48V_11 Datasheet - Page 285
ATMEGA48V_11
Manufacturer Part Number
ATMEGA48V_11
Description
8-bit Atmel Microcontroller with 4/8/16K Bytes In-System Programmable Flash
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.ATMEGA48V_11.pdf
(377 pages)
- Current page: 285 of 377
- Download datasheet (9Mb)
28. Memory programming
28.1
2545T–AVR–05/11
Program and data memory lock bits
The Atmel ATmega88/168 provides six Lock bits which can be left unprogrammed (“1”) or can
be programmed (“0”) to obtain the additional features listed in
be erased to “1” with the Chip Erase command.The Atmel ATmega48 has no separate Boot
Loader section. The SPM instruction is enabled for the whole Flash if the SELFPRGEN fuse is
programmed (“0”), otherwise it is disabled.
Table 28-1.
Notes:
Table 28-2.
Notes:
Lock bit byte
BLB12
BLB11
BLB02
BLB01
LB2
LB1
LB mode
1
2
3
(2)
(2)
(2)
(2)
1. “1” means unprogrammed, “0” means programmed.
2. Only on ATmega88/168.
1. Program the fuse bits and boot lock bits before programming the LB1 and LB2.
2. “1” means unprogrammed, “0” means programmed.
Memory lock bits
Lock bit byte
Lock bit protection modes
LB2
1
1
0
(1)
LB1
.
1
0
0
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 boot
lock bits and fuse bits are locked in both serial and parallel
programming mode.
(1)(2)
Description
–
–
Boot lock bit
Boot lock bit
Boot lock bit
Boot lock bit
Lock bit
Lock bit
.
(1)
Table
ATmega48/88/168
Default value
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
28-2. The Lock bits can only
(1)
285
Related parts for ATMEGA48V_11
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Manufacturer:
Atmel Corporation
Datasheet:
Part Number:
Description:
Manufacturer:
Atmel Corporation
Datasheet:
Part Number:
Description:
Atmel CryptoMemory
Manufacturer:
ATMEL [ATMEL Corporation]
Datasheet:
Part Number:
Description:
Atmel CryptoMemory
Manufacturer:
ATMEL [ATMEL Corporation]
Datasheet:
Part Number:
Description:
Atmel CryptoMemory, 16Kbit
Manufacturer:
ATMEL [ATMEL Corporation]
Datasheet:
Part Number:
Description:
INTERVAL AND WIPE/WASH WIPER CONTROL IC WITH DELAY
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Low-Voltage Voice-Switched IC for Hands-Free Operation
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
MONOLITHIC INTEGRATED FEATUREPHONE CIRCUIT
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
AM-FM Receiver IC U4255BM-M
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Monolithic Integrated Feature Phone Circuit
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Multistandard Video-IF and Quasi Parallel Sound Processing
Manufacturer:
ATMEL Corporation
Datasheet: