AT89LP51ED2-20MU Atmel, AT89LP51ED2-20MU Datasheet - Page 204

• Manufacturer Part Number: AT89LP51ED2-20MU
• Description: 8-bit Microcontrollers - MCU 64KB 20MHz 2.4V-5.5V
• Manufacturer: Atmel

Specifications of AT89LP51ED2-20MU

• Rohs: yes
• Core: 8051
• 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: VQFN-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
• Processor Series: AT89x
• Program Memory Type: Flash
• Factory Pack Quantity: 360

Figure 24-9. Bootloader Process
204
AT89LP51RD2/ED2/ID2 Preliminary
PC = 0000h
User Application
BLJB = 1
ENBOOT = 0
USER BOOT LOADER
PC= [SBV]00h
BSB = 00h
SBV = FCh
Condition?
Hardware
BLJB!= 0
RESET
?
?
?
If BLJB = 0 then ENBOOT Bit (AUXR1) is Set
BLJB = 0
ENBOOT = 1
Yes (PSEN = 0, EA = 1, and ALE =1 or Not Connected)
else ENBOOT Bit (AUXR1) is Cleared
Atmel BOOT LOADER
3714A–MICRO–7/11