ATA5773-DK1 Atmel, ATA5773-DK1 Datasheet - Page 166
ATA5773-DK1
Manufacturer Part Number
ATA5773-DK1
Description
BOARD XMITTER FOR ATA5773 315MHZ
Manufacturer
Atmel
Type
Transmitterr
Specifications of ATA5773-DK1
Frequency
315MHz
Maximum Frequency
315 MHz
Supply Voltage (max)
4 V
Supply Voltage (min)
2 V
Supply Current
9 mA
Product
RF Development Tools
For Use With/related Products
ATA5773
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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4.23
4.23.1
166
Memory Programming
Atmel ATA5771/73/74
Program and Data Memory Lock Bits
This section describes the different methods for Programming the Atmel
memories.
The ATtiny44V provides two Lock bits which can be left unprogrammed (“1”) or can be pro-
grammed (“0”) to obtain the additional security listed in
erased to “1” with the Chip Erase command.
Program memory can be read out via the debugWIRE interface when the DWEN fuse is pro-
grammed, even if the Lock Bits are set. Thus, when Lock Bit security is required, should
always debugWIRE be disabled by clearing the DWEN fuse.
Table 4-56.
Note:
Table 4-57.
Notes:
LB2
LB1
LB Mode
Lock Bit Byte
1
2
3
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
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
High-voltage and Serial Programming mode. The Fuse bits are
locked in both Serial and High-voltage Programming mode.
debugWire is disabled.
Further programming and verification of the Flash and
EEPROM is disabled in High-voltage and Serial Programming
mode. The Fuse bits are locked in both Serial and High-voltage
Programming mode.
(1)(2)
Description
–
–
–
–
–
–
Lock bit
Lock bit
(1)
Table
debugWire is disabled.
4-57. The Lock bits can only be
Default Value
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
9137E–RKE–12/10
®
ATtiny44V
(1)
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