Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Development, Learning, Evaluation & Industrial Control Boards
Origin	-
Microcontroller Model	STC15W408AS
Architecture	8051 Compatible (Enhanced)
Package Type	TSSOP20
Operating Voltage	3.3V - 5.5V
Max Clock Frequency	35 MHz
Flash Memory	8 KB
SRAM	256 Bytes + 1 KB XRAM
I/O Ports	15 General Purpose I/O Pins
Interface	UART, SPI, I2C, PWM
Board Dimensions	25mm x 18mm

6 reviews

Anonymous

Mar 23, 2026

Rating: 5/5

Reliable and fast shipping

The board arrived well-packaged. Tested all GPIO pins and the UART communication immediately; everything works as specified. Highly recommend for anyone moving from Arduino to bare-metal 8051.

Anonymous

Mar 15, 2026

Rating: 5/5

Perfect for learning 8051 architecture

This board is exactly what I needed to get started with the STC15 series. The pinout is clearly marked, and it works flawlessly with the STC-ISP software. Great value for money.

Anonymous

Mar 10, 2026

Rating: 4/5

Solid core board, minimal setup required

Very compact and functional. I appreciated that it comes with the necessary decoupling capacitors already installed. Only minor issue is the lack of a built-in USB programmer, but that's expected for a core board.

Anonymous

Mar 08, 2026

Rating: 5/5

Excellent minimum system implementation

Saves me hours of designing a schematic and PCB for prototyping. The reset circuit and crystal oscillator are correctly implemented. Just connect power and start coding.

Anonymous

Mar 03, 2026

Rating: 5/5

Great for university projects

Used this for my embedded systems final project. The stability is impressive even at higher clock speeds. Documentation online is plentiful which helped me debug my code quickly.

Anonymous

Mar 01, 2026

Rating: 4/5

Good quality soldering

The solder joints on the TSSOP chip look professional. I was worried about cold joints given the small pitch, but visual inspection and multimeter tests confirmed good connectivity. Runs cool under load.

5 FAQ

Q: Can this board operate at 3.3V logic levels?

A: Yes, the STC15W408AS supports a wide voltage range from 3.3V to 5.5V, making it compatible with both 3.3V and 5V peripheral modules.

Q: What software is required to program the STC15W408AS?

A: You can use the official STC-ISP software provided by STC Micro, which is compatible with Windows. It supports code downloading via serial port.

Q: Is the crystal oscillator internal or external on this board?

A: The STC15W408AS features a high-precision internal R/C clock, so no external crystal is strictly necessary, though this board layout allows for external clock sources if needed for specific timing requirements.

Q: Does this board come with a USB-to-TTL converter included?

A: No, this is a core minimum system board. You will need an external USB-to-TTL adapter (like CH340 or CP2102) to program the microcontroller via the UART pins.

Q: Are there any example codes available for this specific board?

A: While the board itself is generic, there are numerous examples available online for the STC15W408AS chip covering GPIO, Timers, PWM, and UART. We recommend checking the STC official forum or GitHub repositories.

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