AT89C51RE2-SLSUM Atmel, AT89C51RE2-SLSUM Datasheet - Page 47

• 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

Errors Report /
Miscellaneous states
Flash Busy flag
Flash Programming
Sequence Error
Power Down Mode
Request
7663E–8051–10/08
The FBUSY flag indicates on-going flash write operation.
The busy flag is set by hardware, the hardware clears this flag after the end of the programming
operation.
When a wrong sequence is detected the FSE in FSTA is set.
The following events are considered as not correct activation sequence:
- The two “MOV FCON,5x and MOV FCON, Ax” were not consecutive, or the second instruction
differs from “MOV FCON Ax” (for example, an interrupt occurs during the sequence).
- The sequence (write flash or reset column latches) occurred with no data loaded in the column
latches
The FSE bit can be cleared:
- By software
- By hardware when a correct programming sequence occurs.
Note: When a good sequence occurs just after an incorrect sequence, the previous error is lost.
The user software application should take care to check the FSE bit before initiating a new
sequence.
In Power Down mode, the on-chip flash memory is deselected (to reduce power consumption),
this leads to the lost of the columns latches content.
In this case, if columns latches were previously loaded they are reset: FLOAD bit in FSTA regis-
ter should be reset after power down mode.
If a power down mode is requested during flash programming (FBUSY=1), all power down
sequence instructions should be ignored until the end of flash process.
AT89C51RE2
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