AT89LP51ED2-20MU Atmel, AT89LP51ED2-20MU Datasheet - Page 211

• 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

24.5.7
Figure 24-14. Blank Check Flow
3714A–MICRO–7/11
COMMAND FINISHED
Blank Check Command Description
Wait Address not
Send Blank Check Command
Erased
OR
Host
OR
COMMAND ABORTED
Wait Checksum Error
COMMAND FINISHED
Wait COMMAND_OK
Example:
Example:
Programming Data (write 55h at address 0010h in the Flash)
Programming Atmel function (write SSB to level 2)
Writing Frame (write BSB to 55h)
Blank Check ok at address xxxx
Blank Check ok
Blank Check with checksum error
BOOTLOADER
HOST
BOOTLOADER
HOST
BOOTLOADER
HOST
BOOTLOADER
HOST
HOST
BOOTLOADER
BOOTLOADER
HOST
Blank Check Command
address & CR & LF
: 05 0000 04 0000 7FFF 01 78 xxxx CR LF
: 01 0010 00 55 9A
: 01 0010 00 55 9A . CR LF
: 02 0000 03 05 01 F5
: 02 0000 03 05 01 F5. CR LF
: 03 0000 03 06 00 55 9F
: 03 0000 03 06 00 55 9F . CR LF
: 05 0000 04 0000 7FFF 01 78
: 05 0000 04 0000 7FFF 01 78
: 05 0000 04 0000 7FFF 01 78 . CR LF
: 05 0000 04 0000 7FFF 01 70 X CR LF CR LF
: 05 0000 04 0000 7FFF 01 70
’X’ & CR & LF
’.’ & CR & LF
AT89LP51RD2/ED2/ID2 Preliminary
Send COMMAND_OK
Send Checksum Error
Wait Blank Check Command
Bootloader
Send First Address
not Erased
Checksum Error
Flash Blank
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