AT89C51RE2-SLRUM Atmel, AT89C51RE2-SLRUM Datasheet - Page 45

• 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

Reset of columns
latches space
7663E–8051–10/08
•
•
.
Figure 16. Fuse Configuration Byte Programming Procedure
No automatic reset of the columns latches is performed after a successful flash write
process. Resetting the columns latches during a flash write process is mandatory. User
shall implement a reset of the column latch before each column latch load sequence.
Launch the programming by writing the data sequence 55h followed by A5h in FCON
register.
The end of the programming indicated by the FBusy flag cleared.
Restore the interrupts
Exec: MOVX @DPTR, A
Launch Programming
End Programming
Save & Disable IT
Programming
FCON = 00h
FCON= 55h
FCON= A5h
Clear Mode
FCON = 0Dh
Cleared?
DPTR= 00h
ACC= Data
RestoreIT
Data Load
FBusy
FCB
EA= 0
AT89C51RE2
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