AT89C51RE2-RLTUM Atmel, AT89C51RE2-RLTUM Datasheet - Page 43

• 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

Extra Row
Hardware Security Byte
(HSB)
7663E–8051–10/08
The following procedure is used to program the Extra Row space and is summarized in
Figure 14:
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Figure 14. Flash and Extra row Programming Procedure
The following procedure is used to program the Hardware
summarized in Figure 15:
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Load data in the column latches from address FF80h to FFFFh.
Disable the interrupts.
Launch the programming by writing the data sequence 51h followed by A1h in FCON
register.
The end of the programming indicated by the FBUSY flag cleared.
Enable the interrupts.
Set FPS and map Hardware byte (FCON = 0x0C)
Save and disable the interrupts.
Load DPTR at address 0000h
Load Accumulator register with the data to load.
Execute the MOVX @DPTR, A instruction.
Column Latches Loading
Launch Programming
End Programming
Save & Disable IT
Programming
see Figure 13
FCON = 00h
FCON= A0h
FCON= 50h
Clear Mode
Cleared?
Restore IT
FBusy
Flash
EA= 0
Column Latches Loading
Launch Programming
End Programming
Save & Disable IT
Programming
see Figure 13
FCON = 00h
Security
FCON= 51h
FCON= A1h
Clear Mode
Cleared?
Restore IT
XROW
FBusy
EA= 0
AT89C51RE2
Byte space and is
43