Details

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BUY AT89S8253-24PU https://www.utsource.net/itm/p/11249040.html

Parameter	Description	Value
Part Number	Microcontroller	AT89S8253-24PU
Package Type	Package Type	PDIP-40
Operating Voltage (Vcc)	Supply Voltage Range	4.5 V to 5.5 V
Clock Frequency (fosc)	Maximum Clock Frequency	24 MHz
Flash Memory	Program Memory Size	8 KB
EEPROM	On-chip EEPROM	128 Bytes
RAM	Internal RAM Size	256 Bytes
Data Flash	Data Flash Memory Size	256 Bytes
I/O Ports	Number of I/O Lines	32
Timers/Counters	Number of Timers/Counters	3
Serial Communication	UART, SPI, I2C	Yes, No, No
Watchdog Timer	Watchdog Timer Availability	Yes
Power Consumption	Active Mode Power Consumption (Typical @ 5V, 24MHz)	10 mA
Power Consumption	Idle Mode Power Consumption (Typical @ 5V, 24MHz)	0.1 mA
Temperature Range	Operating Temperature Range	-40°C to 85°C
Programming Method	In-System Programming (ISP)	Yes
Programming Voltage	ISP Programming Voltage	5V
Programming Current	ISP Programming Current (Typical)	10 mA
Package Dimensions	PDIP-40 Package Dimensions	600 mils x 400 mils

Instructions for Use

1. Power Supply:

   • Ensure the supply voltage is within the range of 4.5 V to 5.5 V.
   • Connect the Vcc pin to the positive supply and the GND pin to the ground.

2. Clock Configuration:

   • The microcontroller can operate at a maximum clock frequency of 24 MHz.
   • Connect an external crystal or oscillator to the XTAL1 and XTAL2 pins for accurate timing.

3. Reset Circuit:

   • Connect a reset circuit to the RST pin to allow for proper initialization and reset functionality.
   • A typical reset circuit includes a capacitor and a resistor.

4. I/O Configuration:

   • Configure the I/O ports as input or output using the appropriate register settings.
   • Use pull-up resistors for inputs when necessary.

5. Timers/Counters:

   • Initialize the timers/counters by setting the mode and prescaler values.
   • Use the timer interrupt to handle periodic tasks.

6. Serial Communication:

   • Configure the UART for serial communication by setting the baud rate and other parameters.
   • Use the TXD and RXD pins for data transmission and reception.

7. Watchdog Timer:

   • Enable the watchdog timer to prevent the microcontroller from getting stuck in an infinite loop.
   • Clear the watchdog timer periodically to prevent a reset.

8. Programming:

   • Use an ISP programmer to program the flash memory.
   • Follow the programming protocol specified in the datasheet for successful programming.

9. Power Management:

   • Use the idle mode to reduce power consumption during periods of low activity.
   • Ensure that the power supply is stable and clean to avoid unexpected behavior.

10. Environmental Considerations:

    • Operate the microcontroller within the specified temperature range to ensure reliable performance.
    • Protect the device from electrostatic discharge (ESD) during handling and installation.

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

(For reference only)