Details

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BUY AT89S52-24AU 8051 89S8-BIT 24MHZ 8KB (8K X 8) FLASH 44-TQFP (10X10) https://www.utsource.net/itm/p/12605122.html

Parameter	Value / Description
Microcontroller	AT89S52-24AU
Architecture	8051
Clock Speed	24 MHz
Program Memory	8 KB (8K x 8) Flash
Data Memory (RAM)	256 bytes
Number of I/O Lines	32 (P0, P1, P2, P3)
Interrupt Sources	6 (2 external, 2 timer, 1 serial)
Timers/Counters	3 (2 16-bit, 1 8-bit)
Serial Communication	UART
Power Supply	4.0 V to 5.5 V
Operating Temperature	-40掳C to +85掳C
Package Type	44-TQFP (10x10 mm)
Programming Voltage	5V (for Flash programming)
Watchdog Timer	Yes
Low Power Modes	Idle and Power Down
Pin Count	44

Instructions for Use

1. Power Supply:

   • Connect the VCC pin (pin 40) to a 5V power supply.
   • Connect the GND pin (pin 20) to ground.

2. Clock Configuration:

   • Connect an external crystal oscillator or ceramic resonator between XTAL1 (pin 19) and XTAL2 (pin 18) for the desired clock frequency (up to 24 MHz).

3. Reset Circuit:

   • Connect a reset circuit to the RST pin (pin 9). A typical reset circuit includes a capacitor and resistor to provide a reset pulse when the power is applied.

4. Program Memory:

   • Program the Flash memory using an in-circuit programmer or an external programmer that supports the AT89S52-24AU.

5. I/O Ports:

   • Configure the I/O ports (P0, P1, P2, P3) as input or output by setting the corresponding port registers.
   • P0 can be used as an 8-bit open-drain port or as the lower 8 bits of the address/data bus for external memory access.
   • P1, P2, and P3 are bidirectional I/O ports with internal pull-up resistors.

6. Interrupts:

   • Enable interrupts by setting the appropriate bits in the Interrupt Enable (IE) register.
   • Write interrupt service routines (ISRs) to handle specific interrupt sources.

7. Timers/Counters:

   • Configure the timers/counters by setting the mode and control registers (TMOD and TCON).
   • Use the timers for timing or counting external events.

8. Serial Communication:

   • Set up the serial communication parameters (baud rate, data format) by configuring the Serial Control (SCON) register.
   • Use the TXD (pin 11) and RXD (pin 10) pins for serial data transmission and reception.

9. Watchdog Timer:

   • Enable the watchdog timer by setting the appropriate bit in the Watchdog Timer Control (WDTCON) register.
   • Periodically clear the watchdog timer to prevent a reset.

10. Low Power Modes:

    • Enter idle mode by setting the IDL bit in the Power Control (PCON) register.
    • Enter power-down mode by setting the PD bit in the Power Control (PCON) register.

11. Debugging:

    • Use an in-circuit debugger to monitor and control the microcontroller during development.

12. Package Handling:

    • Handle the 44-TQFP package with care to avoid damage to the pins and ensure proper soldering to the PCB.

By following these instructions, you can effectively use the AT89S52-24AU microcontroller in your embedded systems projects.

(For reference only)