Details

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BUY AT89C51RC-24PU https://www.utsource.net/itm/p/11249061.html

Parameter	Description	Value
Package Type	The type of package used for the IC	44-Pin PLCC (Plastic Leaded Chip Carrier)
Operating Voltage (Vcc)	Range of supply voltage for operation	4.75V to 5.25V
Clock Frequency	Maximum clock frequency for operation	24 MHz
Flash Memory	Size of on-chip Flash memory	64 KB
RAM	Size of on-chip RAM	1024 bytes (1 KB)
Data EEPROM	Size of on-chip Data EEPROM	512 bytes
I/O Ports	Number of I/O ports	32 (P0, P1, P2, P3)
Timer/Counters	Number of Timer/Counter modules	3 (T0, T1, T2)
Serial Communication Interface (SCI)	Number of SCI interfaces	1
Serial Peripheral Interface (SPI)	Number of SPI interfaces	1
Watchdog Timer (WDT)	Availability of Watchdog Timer	Yes
Power Consumption	Typical power consumption at 5V and 24 MHz	150 mA
Operating Temperature Range	Range of temperatures for operation	-40°C to +85°C
Programming Voltage (Vpp)	Voltage required for programming	12.75V to 13.25V
Programming Time	Time required for programming	1 ms per byte
Erase Time	Time required for erasing	10 ms (chip erase)
Endurance	Number of program/erase cycles	10,000 cycles
Data Retention	Minimum data retention time	10 years

Instructions for Use:

1. Power Supply:

   • Ensure that the supply voltage (Vcc) is within the range of 4.75V to 5.25V.
   • Connect Vcc to the appropriate pin and GND to the ground pin.

2. Clock Configuration:

   • Use an external crystal oscillator or ceramic resonator connected to the XTAL1 and XTAL2 pins to generate the clock signal.
   • For a 24 MHz clock, use a 24 MHz crystal.

3. Programming:

   • Use a programmer that supports the AT89C51RC-24PU.
   • Apply the programming voltage (Vpp) to the appropriate pin during programming.
   • Follow the programming algorithm provided by the manufacturer to ensure correct programming.

4. Reset:

   • Apply a high-level reset signal to the RST pin for at least two machine cycles to initialize the microcontroller.
   • A reset circuit can be designed using a capacitor and resistor to automatically reset the microcontroller on power-up.

5. I/O Ports:

   • Configure the I/O ports (P0, P1, P2, P3) as input or output using the appropriate register settings.
   • P0 and P2 require pull-up resistors when used as inputs.

6. Timers/Counters:

   • Initialize the timer/counter registers (TMOD, THx, TLx) and start the timer/counter by setting the TRx bit in the TCON register.
   • Use the interrupt enable (IE) register to enable interrupts for timer/counter events.

7. Serial Communication:

   • Configure the serial communication interface (SCI) using the SCON register.
   • Set the baud rate using the Timer1 in mode 2 (8-bit auto-reload) or mode 1 (16-bit timer).

8. Watchdog Timer:

   • Enable the watchdog timer by setting the WDTRST bit in the WDT register.
   • Reset the watchdog timer periodically to prevent a reset.

9. Power Management:

   • Use the idle mode (IDLE) or power-down mode (PD) to reduce power consumption when the microcontroller is not actively processing.
   • Enter these modes by setting the appropriate bits in the PCON register.

10. Handling:

    • Handle the microcontroller with care to avoid static damage.
    • Store the microcontroller in an anti-static bag when not in use.

For detailed information, refer to the datasheet and application notes provided by Atmel (now part of Microchip Technology).

(For reference only)