ATTINY20-EK1 Atmel, ATTINY20-EK1 Datasheet - Page 164

• Manufacturer Part Number: ATTINY20-EK1
• Description: KIT EVAL TOUCH ATTINY20
• Manufacturer: Atmel

Specifications of ATTINY20-EK1

• Sensor Type: *
• Sensing Range: *
• Interface: *
• Sensitivity: *
• Voltage - Supply: *
• Embedded: *
• Utilized Ic / Part: *
• Silicon Manufacturer: Atmel
• Core Architecture: AVR
• Core Sub-architecture: TinyAVR
• Kit Contents: Board
• Svhc: No SVHC (15-Dec-2010)
• Mcu Supported Families: ATtiny20
• Tool / Board Applications: Microcontroller
• Rohs Compliant: Yes
• Tool Type: Development Kit
• Cpu Core: AVR 8
• Data Bus Width: 8 bit
• Processor To Be Evaluated: ATtiny20
• Interface Type: Touch
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

19.3
19.3.1
164
Non-Volatile Memories
ATtiny20
Non-Volatile Memory Lock Bits
The ATtiny20 has the following, embedded NVM:
The ATtiny20 provides two Lock Bits, as shown in
Table 19-1.
The Lock Bits can be left unprogrammed ("1") or can be programmed ("0") to obtain the addi-
tional security shown in
command, only.
Table 19-2.
Notes:
• Non-Volatile Memory Lock Bits
• Flash memory with four separate sections
Lock Mode
Lock Bit
NVLB2
NVLB1
1
2
3
1. Program the configuration section bits before programming NVLB1 and NVLB2.
2. "1" means unprogrammed, "0" means programmed
Memory Lock Bits
Lock Bit Byte
Lock Bit Protection Modes
NVLB2
Bit No
1
1
0
7
6
5
4
3
2
1
0
(2)
Table
(1)
Description
Non-Volatile Lock Bit
Non-Volatile Lock Bit
NVLB1
19-2. Lock Bits can be erased to "1" with the Chip Erase
1
0
0
(2)
Protection Type
No Memory Lock feature Enabled
Further Programming of the Flash memory is disabled in
the external programming mode. The configuration
section bits are locked in the external programming
mode
Further programming and verification of the flash is
disabled in the external programming mode. The
configuration section bits are locked in the external
programming mode
Table
19-1.
1 (unprogrammed)
1 (unprogrammed)
Default Value
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
8235B–AVR–04/11