AT89C51RE2-RLTUM Atmel, AT89C51RE2-RLTUM Datasheet - Page 44

• Manufacturer Part Number: AT89C51RE2-RLTUM
• Description: MCU 8051 128K FLASH 44-VQFP
• Manufacturer: Atmel
• Series: 89Cr

Specifications of AT89C51RE2-RLTUM

• 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-TQFP, 44-VQFP
• Processor Series: AT89x
• Core: 8051
• Data Bus Width: 8 bit
• Data Ram Size: 8 KB
• Interface Type: UART, SPI
• Maximum Clock Frequency: 60 MHz
• Number Of Programmable I/os: 34
• Number Of Timers: 3
• Operating Supply Voltage: 2.7 V to 5.5 V
• 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
• Height: 1.45 mm
• Length: 10.1 mm
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 2.7 V
• Width: 10.1 mm
• For Use With: AT89STK-11 - KIT STARTER FOR AT89C51RX2
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Details

Fuse Configuration Byte
(FCB)
44
AT89C51RE2
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•
.
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:
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•
•
•
•
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