AT89C51RE2-SLRUM Atmel, AT89C51RE2-SLRUM Datasheet - Page 49

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

Specifications of AT89C51RE2-SLRUM

• 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
• 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
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: PK51, CA51, A51, ULINK2
• Development Tools By Supplier: AT89OCD-01
• 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 ConfigurationByte
7663E–8051–10/08
Figure 18. HSB Reading Procedure
The following procedure is used to read the Fuse Configuration byte and is summarized
in Figure 18:
•
•
•
HSB Reading Procedure
Map the FCB by writing 05h in FCON register.
Read the byte in Accumulator by executing MOVC A,@A+DPTR with A= 0 & DPTR= 0000h.
Clear FCON to unmap the Hardware Security Byte.
Exec: MOVC A, @A+DPTR
Exec: MOVC A, @A+DPTR
FCON = 00h (FPS = 0)
FCON = 00h (FPS = 0)
HSB Unmapping
HSB Unmapping
HSB Reading
FCB Reading
HSB Mapping
FCB Mapping
DPTR= 0000h
DPTR= 0000h
FCON = 04h
FCON = 05h
Data Read
Data Read
ACC= 00h
ACC= 00h
AT89C51RE2
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