Details

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BUY STC89C52RC-40-PLCC https://www.utsource.net/itm/p/12607282.html

Parameter	Description	Value
Part Number	Device Identifier	STC89C52RC-40-PLCC
Package Type	Encapsulation	PLCC-44
Operating Voltage (Vcc)	Supply Voltage Range	4.0 V to 5.5 V
Operating Frequency	Maximum Clock Frequency	40 MHz
Flash Memory	Program Memory Size	8 KB
RAM	Data Memory Size	256 bytes
EEPROM	Non-Volatile Data Storage	None
I/O Pins	Number of General Purpose I/O Pins	32
Timers/Counters	Number of Timers/Counters	3 (T0, T1, T2)
Serial Communication Interfaces	UART, SPI, I2C	1 UART, No SPI, No I2C
Interrupt Sources	Number of Interrupt Sources	14
Power Consumption	Typical Active Current at 12 MHz	2.5 mA
Temperature Range	Operating Temperature	-40掳C to +85掳C
Programming Interface	In-System Programming (ISP)	Yes
Watchdog Timer	On-Chip Watchdog Timer	Yes
Low Voltage Detection	Brown-out Reset (BOR)	Yes
Power Management	Power-down Modes	Idle Mode, Power-down Mode
Package Dimensions	Physical Size	11.7 x 11.7 mm

Instructions for Use

1. Power Supply:

   • Ensure the supply voltage (Vcc) is within the specified range of 4.0 V to 5.5 V.
   • Connect the Vcc pin to the power supply and GND pin to ground.

2. Clock Configuration:

   • The device supports a maximum clock frequency of 40 MHz. Use an external crystal or oscillator if required.
   • For internal RC oscillator operation, configure the appropriate fuse bits.

3. Programming:

   • Use an ISP programmer to program the flash memory.
   • Ensure the programming voltage (Vpp) is applied correctly if using high-voltage programming.

4. I/O Configuration:

   • Configure the I/O pins as inputs or outputs using the corresponding registers (P0, P1, P2, P3).
   • Use pull-up resistors for open-drain configurations.

5. Timers/Counters:

   • Initialize the timers/counters by setting the mode and prescaler values in the TCON and TMOD registers.
   • Enable interrupts for timer overflow or capture events if needed.

6. Serial Communication:

   • Configure the UART settings (baud rate, data bits, stop bits) in the SCON register.
   • Use the TXD and RXD pins for serial communication.

7. Interrupts:

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

8. Power Management:

   • Use the idle mode to reduce power consumption while keeping the CPU running.
   • Use the power-down mode to minimize power consumption when the device is not in use.

9. Watchdog Timer:

   • Enable the watchdog timer to reset the microcontroller if it hangs.
   • Clear the watchdog timer periodically to prevent an unintended reset.

10. Brown-out Reset:

    • Enable the brown-out reset feature to automatically reset the microcontroller if the supply voltage drops below a certain threshold.

11. Handling:

    • Handle the device with care to avoid static damage.
    • Follow proper soldering techniques to ensure reliable connections.

For detailed information, refer to the datasheet and application notes provided by the manufacturer.

(For reference only)