AT89LP51ED2-20AU Atmel, AT89LP51ED2-20AU Datasheet - Page 206
AT89LP51ED2-20AU
Manufacturer Part Number
AT89LP51ED2-20AU
Description
8-bit Microcontrollers - MCU 64KB 20MHz 2.4V-5.5V
Manufacturer
Atmel
Datasheet
1.AT89LP51ED2-20AAU.pdf
(254 pages)
Specifications of AT89LP51ED2-20AU
Rohs
yes
Core
8051
Processor Series
AT89x
Data Bus Width
8 bit
Maximum Clock Frequency
20 MHz
Program Memory Size
64 KB
Data Ram Size
256 B
On-chip Adc
Yes
Operating Supply Voltage
2.4 V to 5.5 V
Operating Temperature Range
- 40 C to + 85 C
Package / Case
TQFP-44
Mounting Style
SMD/SMT
Data Rom Size
4 KB
Interface Type
2-Wire, SPI, UART
Number Of Programmable I/os
36
Number Of Timers
3
Program Memory Type
Flash
Factory Pack Quantity
160
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24.5.3
24.5.3.1
206
AT89LP51RD2/ED2/ID2 Preliminary
Bootloader Protocol Description
Physical Layer
Table 24-15. Software Security Byte
The two lock bits provide different levels of protection for the on-chip code and data, when pro-
grammed as shown in
Table 24-16.
Note:
The UART used to transmit information has the following configuration:
• Character: 8-bit data
• Parity: none
• Stop: 2 bits
• Flow control: none
• Baud Rate: autobaud is performed by the bootloader to compute the baud rate chosen by the
Security
Number
host.
Level
Bit
1-0
7
6
5
4
3
2
Program Lock Bits
1
2
3
7
-
X: Do not care
WARNING: Security level 2 and 3 should only be programmed after Flash verification.
Mnemonic
LB0
X
1
0
User Memory Lock Bits of the SSB
LB1-0
Bit
6
-
-
-
-
-
-
-
LB1
1
1
0
Table
Description
Reserved
Do not clear this bit.
Reserved
Do not clear this bit.
Reserved
Do not clear this bit.
Reserved
Do not clear this bit.
Reserved
Do not clear this bit.
Reserved
Do not clear this bit.
User Memory Lock Bits
See
Protection Description
No program lock features enabled.
Bootloader programming of the Flash is disabled.
Same as 2, also verify through Bootloader programming interface is disabled.
Table 24-16
24-16.
5
-
4
-
3
-
2
-
LB1
1
3714A–MICRO–7/11
LB0
0
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