Details

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BUY S87C751-1F24 https://www.utsource.net/itm/p/12603398.html

Parameter	Description	Value
Device Type	8-bit Microcontroller	-
Package	DIP-40	-
Operating Voltage (Vcc)	Supply Voltage Range	5.0 V 卤 10%
Operating Temperature	Industrial Range	-40掳C to +85掳C
Flash Memory	Program Memory Size	32 KB
RAM	Data Memory Size	256 bytes
EEPROM	Non-Volatile Data Storage	256 bytes
Clock Frequency	Internal Oscillator	4 MHz to 24 MHz
I/O Ports	Number of General Purpose I/O Pins	32
Timers	Number of Timers	3
UART	Universal Asynchronous Receiver/Transmitter	1
Watchdog Timer	On-chip Watchdog Timer	Yes
Power Management	Low Power Modes	Idle, Power Down
Packaging	Moisture Sensitivity Level	MSL 3

Instructions for Use:

1. Power Supply:

   • Ensure the supply voltage is within the specified range of 4.5V to 5.5V.
   • Connect a decoupling capacitor (0.1渭F) close to the Vcc and GND pins to stabilize the power supply.

2. Clock Configuration:

   • The device supports external crystal oscillators or ceramic resonators. Connect the oscillator between the XTAL1 and XTAL2 pins.
   • For internal clock operation, configure the appropriate fuse bits.

3. I/O Ports:

   • Configure the I/O ports using the data direction registers (DDRs).
   • Use pull-up resistors for inputs if necessary.

4. Timers:

   • Initialize the timer prescaler and mode registers as needed.
   • Enable interrupts for timer overflow or compare match events.

5. UART:

   • Set the baud rate and other communication parameters in the UART control registers.
   • Use the UART transmit and receive functions to send and receive data.

6. Watchdog Timer:

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

7. Low Power Modes:

   • Enter idle mode by halting the CPU while keeping peripherals active.
   • Enter power-down mode to minimize power consumption.

8. Programming:

   • Use an in-circuit programmer to write code to the flash memory.
   • Follow the programming algorithm provided in the datasheet for correct operation.

9. Handling:

   • Handle the device with care to avoid static damage.
   • Store the device in a moisture-controlled environment to prevent damage from humidity.

(For reference only)