AT89C51RE2-SLSUM Atmel, AT89C51RE2-SLSUM Datasheet - Page 44

• Manufacturer Part Number: AT89C51RE2-SLSUM
• Description: MCU 8BIT FLASH 2.7-5.5V 44-PLCC
• Manufacturer: Atmel
• Series: 89Cr

Specifications of AT89C51RE2-SLSUM

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 60MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 34
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-PLCC
• Package: 44PLCC
• Device Core: 8051
• Family Name: 89C
• Maximum Speed: 40 MHz
• Operating Supply Voltage: 3.3|5 V
• Data Bus Width: 8 Bit
• Number Of Programmable I/os: 34
• Interface Type: SPI/TWI/UART
• Number Of Timers: 3
• Processor Series: AT89x
• Core: 8051
• Data Ram Size: 8 KB
• Maximum Clock Frequency: 40 MHz
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: PK51, CA51, A51, ULINK2
• Development Tools By Supplier: AT89OCD-01
• Minimum Operating Temperature: - 40 C
• Cpu Family: 89C
• Device Core Size: 8b
• Frequency (max): 40MHz
• Total Internal Ram Size: 8KB
• # I/os (max): 34
• Number Of Timers - General Purpose: 3
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 2.7V
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 44
• Package Type: PLCC
• For Use With: AT89OCD-01 - USB EMULATOR FOR AT8XC51 MCUAT89STK-11 - KIT STARTER FOR AT89C51RX2
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Fuse Configuration Byte
(FCB)
44
AT89C51RE2
•
•
.
Figure 15. Hardware Security Byte Programming Procedure
The following procedure is used to program the Fuse Configuration Byte space and is
summarized in Figure 16:
•
•
•
•
•
Launch the programming by writing the data sequence 54h followed by A4h in FCON
register.
The end of the programming indicated by the FBusy flag cleared.
Restore the interrupts
Set FPS and map FCB (FCON = 0x0D)
Save and disable the interrupts.
Load DPTR at address 0000h
Load Accumulator register with the data to load.
Execute the MOVX @DPTR, A instruction.
Launch Programming
Exec: MOVX @DPTR, A
End Programming
Save & Disable IT
Programming
FCON = 00h
FCON= A4h
FCON= 54h
Clear Mode
Cleared?
FCON = 0Ch
RestoreIT
DPTR= 00h
ACC= Data
Data Load
FBusy
HSB
EA= 0
7663E–8051–10/08