Microcontroller PCB

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What is a microcontroller PCB?

by Soldertools. “A single-board microcontroller is a microcontroller built onto a single printed circuit board.
This board provides all of the circuitry necessary for a useful control task: microprocessor, I/O circuits, clock generator, RAM, stored program memory and any support ICs necessary.

microcontroller PCB
types of microcontrollers

What are the types of microcontrollers?

Different types of Microcontroller Programming used in Embedded Systems Advantages. A microcontroller is a cheap and minimal size, easy to carry out. …
PIC Microcontroller
ARM Microcontroller
8051 Microcontroller
AVR Microcontroller
MSP Microcontroller

Advantages and Applications of Microcontroller

1.A microcontroller is a cheap and minimal size, easy to carry out. Therefore it can be embedded on any device.
2.Programming of microcontrollers is simple to learn. It’s not much complicated.
3.We can use simulators on a computer to see the practical results of our Microcontrollers Programming. Those we can work on an embedded project with even buying the required components and chips.
4.We can virtually see the working of our project of a program.

Advantages and Applications of Microcontroller

Your Trusted Microcontroller PCB Supplier in China

microcontroller PCB

Venture is a professional manufacturer and fabricator of microcontroller PCB in China. We have enough knowledge and experience in the manufacturing industry. We are your ultimate choice when it comes to microcontroller PCB.

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Venture has a full capability to provide a high-quality microcontroller PCB with the best performance. If you desire to have an excellent microcontroller PCB, Venture is the best place to go. You can find on Venture the extraordinary kind of microcontroller PCB and other PCBs products.

Your Leading Microcontroller PCB Manufacturer in China

Venture is a leading manufacturer and supplier of PCBs products like microcontroller PCB. We have a high-end microcontroller PCB which is perfect for industrial and commercial applications. So if you are looking for a qualified fabricator for your microcontroller PCB requirements you can come on Venture.

microcontroller PCB

The microcontroller is divided into an external memory microcontroller and embedded memory microcontroller. To have the best performance, you can use the Venture microcontroller PCB. With Venture microcontroller PCB you will have only a short time for performing an operation.

If you use Venture microcontroller PCB, the processor chips will have a very small and also flexibility occurs. It also offers a higher integration and because of that, the cost will be reduced. Venture microcontroller PCB is not only a cost-effective device, it is also performed in the best and great way.

microcontroller PCB

The Venture microcontroller PCB is the most preferred for those who have a professional business. Due to its flexibility and cost-effectiveness, this makes them the most in-demand and popular in the PCB industry.

The venture is the most reliable supplier of microcontroller PCB with reliable performance. We have a wide range of PCBs products to offer for the customer’s needs. We can absolutely help you to choose the right PCB to make it perfect for your applications.

The venture is a highly recommended fabricator of microcontroller PCB products. We are the best way that will help you to have an outstanding microcontroller PCB and the other PCBs devices. We are known as a high-quality supplier of microcontroller PCB and electronic components.

microcontroller PCB

Venture company is the only trusted supplier and fabricator of microcontroller PCB that is located in the place of China. We are the right company that can help your business improve and grow.

We will give our full effort to provide you with the most quality products and excellent services that you deserve. Our team always focuses on our customer’s requirements and that’s what makes us the great and best partner that exists in this industry.

You can send your inquiries to us anytime and our best response will be expected!

Microcontroller PCB: The Ultimate FAQ Guide


Let’s look at some of the fundamental aspects you should know about microcontroller PCB.

Whether you want to learn about features, specifications, uses or vital components – you will find all information right here.

So, keep reading to learn more.

What Is The Role Of Microcontroller PCB?

A microcontroller printed circuit board is employed for a particular application and fabricated to execute certain tasks.

Basically, a microcontroller PCB collects input, processes the data, and outputs a specific action depending on the information collected.

Microcontroller PCB often function at lower speeds, ranging from 1MHz to 200 MHz.

The PCB design should make it use less power since it is embedded within other gadgets that can have higher power uptake.

 Microcontroller PCB

Microcontroller PCB

How Does Microprocessor PCB Vs Microcontroller PCB Compare?

Below are the differences between microcontroller PCB vs. Microprocessor PCB:


Save that both microcontroller PCB and microcontroller PCB are semiconductors, there is big difference between them.

A microprocessor printed circuit board is an entirely central processing unit. This PCB type features no EEPROM or RAM, rather employs a system bus for linking to communication interface, peripheral controls, and external memories.

In contrast, there are various microcontroller PCB models that include varying sizes of RAM, Flash, special function peripherals, I/O ports, and connectivity.

A microcontroller PCB intended for automotive applications may possess very different specifications in comparison to that for wireless communication.

Microprocessor implements commands from RAM linked to it through a system bus while microcontroller PCB typically utilizes its internal Flash to execute instructions.

For that matter, microprocessor boards are better in code execution since their RAM read cycle is generally quicker.


Based on processing speed, microprocessor circuit boards are advantageous over microcontroller boards.

Microcontroller PCB speed is in the tens of MHz while that of microprocessor circuit board is in the range of 100s of MHz or GHz

This obvious speed difference makes microprocessor PCBs perfect for data-crunching PCB applications.


Microcontroller PCBs consume less power as compared to microprocessor PCBs.

Microcontrollers normally have energy-saving ability that allows them to function in sleep or low power mode.

These features are not found in microprocessors. Moreover, functioning at higher speeds makes microprocessor printed circuit boards to have higher energy consumption.


The microcontroller PCB design is usually less complex since it has the necessary peripheral and memory modules in one IC.

For that matter, you require minimal components to construct a complete, functional circuit board.

Conversely, being a bare CPU, microprocessor PCB needs to be coupled with communication modules, timers, memory chips, system bus and I/O ports.

This consumes substantial space leading to a bigger footprint on the PCB layout.

Which Are The Types Of Microcontrollers Used In Microcontroller Printed Circuit Board?

Microcontrollers are classified based on memory structure, bus-width and instruction set. Moreover, for similar category, there might be differing forms having different sources.

Microcontrollers Types Based on Number of Bits

Here, there are three main classes of microcontroller including:

8-bit Microcontroller

This microcontroller has an 8-bit internal bus with the ALU performing the logic and arithmetic operations.

Examples of 8-bit microcontroller include Motorola MC68HC11, PIC1x, and Intel 8031/8051 families.

16-bit Microcontroller

The 16-bit microcontroller type ensures higher accuracy and performance in comparison to 8-bit version.

For instance, 8-bit types of microcontrollers can just utilize 8 bits, leading to a 0×00 – 0xFF final range for each cycle.

On the contrary, the bit data of 16-bit microcontrollers have a 0×0000 – 0xFFFF range for each cycle.

Some of the examples of 16-bit microcontrollers are extended 8051XA, Motorola MC68HC12, PIC2x, and Intel 8096 families.

32-bit Microcontroller

As the name suggests, this type of microcontroller employs 32-bit instructions to execute the logic and arithmetic processes.

PIC3x and Intel/Atmel 251 family are some of the examples of 32-bit microcontroller.

32-Bit ARM Microcontroller PCB

32-Bit ARM Microcontroller PCB

Microcontrollers Types Based On Memory Devices

There are two groups of microcontroller depending on memory device including:

Embedded Memory Microcontroller

This describes an embedded system with a microcontroller unit having all functional blocks present on a chip.

External Memory Microcontroller

External memory microcontroller refers to an embedded system with a microcontroller unit that does not have all functional blocks present on a chip.

Microcontrollers Types Based On Instruction Set

The types of microcontroller in this category consist of:

CISC Microcontroller

Short form for Complex Instruction Set Computer, CISC microcontroller enables the programmer to apply one command in place of several simpler commands.

CISC microcontroller systems reduce execution time through reduction of instructions amount per program.

RISC Microcontroller

Acronym for Reduced Instruction Set Computer, RISC microcontroller lets every command to run on any register.

Also, the instruction can utilize any mode of addressing and concurrent access of data and program.

RISC microcontroller systems reduce execution time through reduction of the clock cycles for each instruction.

They offer a better execution compared to the CISC microcontroller type.

Microcontrollers Types Based On Memory Architecture

There are two key types of memory architecture of microcontroller namely:

Harvard Memory Architecture Microcontroller

Microcontroller of this type features a different memory address space in the processor for data and program memory.

Princeton Memory Architecture Microcontroller

In this type of microcontroller, there is a one memory address in the processor for data and program memory.

Why Should You Use Microcontroller PCB?

Some of the benefits of using microcontroller PCB for your applications include:

  • Little time is required to execute its function.
  • The microcontroller PCB is small in size, hence enables flexibility during installation in its area of application.
  • Because of its improved integration, microcontroller circuit board features a minimized size and cost.
  • Microcontroller PCB allows for easy interfacing of additional RAM, ROM, and I/O ports.
  • Once programmed, you cannot reprogram microcontroller board for other applications. This maintains their operational integrity.
  • You can execute a number of tasks concurrently using microcontroller PCB. As a result, you avoid computational issues that would consume plenty of time when carried out manually.
  • Microcontroller PCB module can function as standalone microcomputer if there are no any digital components.
  • Moreover, it is simpler to use, maintain and troubleshoot a microcontroller printed circuit board.

Which Are The Main Components Of Microcontroller PCB?

Typically, microcontroller circuit board consists of the following primary components:


The CPU controls all the data/instructions that the microcontroller PCB receives.

Consider it as the system’s brain, which processes all the input data and implements the required commands.

The two primary components of CPU comprise of:

Control unit that manages all the executions of instruction by the processor

Arithmetic Logic Unit (ALU) that implements arithmetic and logical processes.


In a microcontroller PCB, the memory chip functions as a microprocessor since it saves all the programs and data.

Most microcontroller circuit boards feature ROM, RAM and flash memory to save program source code.

I/O Ports

Essentially, the microcontroller board uses these ports to interface, that is, link to the real-world applications like printers and LCDs.

Serial Ports

This is the serial communication interface, which links the ICs to signal tracks on the microcontroller PCB.


Also referred to as counters, timers are essential in managing all the counting and timing operations in the microcontroller circuit board.

They execute clock functions, making oscillations, measuring frequency, modulations, pulse generation, among other operations.

Analog to Digital Converter (ADC)

As the name suggests, the primary role of ADC is analog to digital conversion of signals.

Digital to Analog Converter (DAC)

On the other hand, DAC helps in digital to analog conversion of signals.

Interpret Control

This controller is applied in giving delayed monitoring to running program, and can be either internal or external.

Special Function Block

Some special microcontroller PCB designs for special gadgets such as space systems and robots feature special function block.

The block includes additional parts to perform some specific processes.

Microcontroller PCB Components

Microcontroller PCB Components

What Is The Difference Between Flash Memory Vs. EEPROM Of Microcontroller PCB?

Flash memory refers to a non-volatile memory type that reserves its data for prolonged duration, even when you turn off the microcontroller board.

This retains the stored program which you may have uploaded to the PCB microcontroller.

Flash Memory of microcontroller PCB writes to a “sector” or “block” at a time.

Therefore, when you want to only re-write one byte, the flash memory will have to re-write the entire block with the byte.

Similar to flash memory, EEPROM is also a non-volatile memory that reserves its data for extended time even after shutdown.

The dissimilarity is that, EEPROM is able to re-write any specified byte at any period, whilst flash memory re-writes a “sector” of bytes.

The prolongs EEPROM lifespan in comparison to flash memory, although also implies that it is costlier.

How Many Serial Communication Protocols Can Microcontroller PCB Support?

Majority of microcontroller PCBs can support the following serial communication protocols:

  • USB
  • SPI
  • I2C
  • UART

Why Are Parasitics Essential In Microcontroller PCB?

Parasitics refer to passive components (inductors, capacitors, and resistors) that you do not purposefully include in the microcontroller PCB.

However, they are part of and influence the board performance.

For instance, though a signal trace should be an absolute short, it essentially has some limited inductance, resistance and capacitance.

These variables get more significant with increasing number of vias, bends and trace length.

Therefore, you will place a resistor (neglecting any inductance and capacitance) between the voltage source and microcontroller.

This is essential when the power source is positioned far from the microcontroller.

When the microcontroller PCB abruptly needs quick current spike, it will create a voltage drop through this trace resistor.

The microcontroller pin voltage will be lesser during the current surge even if the output of voltage regulator might be accurate 3.30V.

You use decoupling capacitors to resolve this problem. Capacitors act like small batteries which store electrical charge.

Positioning them exactly at the supply pins of the microcontroller enable to deliver any quick, transient current requirements of the microcontroller PCB.

The power supply recharges the capacitors after the transient load fades, making them ready for succeeding load current increase.

Which Are The Vital Support Circuitries Of Microcontroller PCB?

Microcontroller PCB includes a number of functional blocks which you cannot categorize as peripherals.

This is because their main role is not to monitor, control, or connect with external components.

Nonetheless, they are very critical in the application of microcontroller circuit board.

These support circuitries enhance the development process, simplify implementation, and support the device’s internal operation.

  • Debug circuitry enables the microcontroller PCB designer to keenly monitor it as the microcontroller executes commands. This is a crucial and at times necessary technique of detecting bugs and boosting firmware performance.
  • Interrupts are exceedingly important elements of microcontroller PCB performance. Interrupts are produced by internal or external hardware-based occurrences.

The interrupts make the processor to instantly react to these occurrences by implementing a specified category of instructions.

  • Clock-generation module may be regarded a peripheral when it is purposed to generate signals, which will be utilized outside the chip.

However, in most instances, the primary role of internal oscillator of microcontroller PCB is to offer clock signal for peripherals and CPU.

Internal oscillators usually have low accuracy. Nonetheless, they are an effective means of simplifying the design and saving microcontroller board space for applications that can accommodate the low precision.

  • You can include a variety of power supply circuitries on the microcontroller board. Integrated voltage regulators facilitate on-chip production of needed supply voltages.

Power management modules may be employed to substantially minimize the current consumption of the PCB device during inactive states.

Also, supervisor modules can ensure the processor is in steady reset condition if there is inadequate supply voltage to guarantee reliable operation.

Should All Microcontroller PCBs Have A Clock?

For timing purposes, all microcontroller PCBs need a clock, which is simply an accurate oscillator. Microcontroller boards implement programmed commands serially with every clock tick.

The simplest choice to use is the internal clock, which is also referred to as an RC oscillator.

This is due to the fact that it applies timing traits of a capacitor and resistor.

However, RC oscillator has low accuracy, thus it is only suitable for simple microcontroller circuit board applications.

For higher accuracy, you can use external crystal-based oscillator.

 Microcontroller PCB Assembly

Microcontroller PCB Assembly

How Do You Configure The Clock Of Microcontroller PCB?

Clock configuration is among the most vital aspects of microcontroller board. However, you might not prefer the default clock configuration.

For instance, an 8-bit Atmega will by default, utilize 1 MHz RC oscillator.

Therefore, in case you need a different frequency or clock source, it will be necessary to alter the configuration settings of microcontroller PCB.

You can perform this by integrating the required register modifications into the board.

Fortunately, most IDE will likely incorporate a tool that exceptionally simplifies the procedure of creating hardware configuration code.

Nevertheless, you need to be cautious when effecting changes.

The microcontroller PCB will not operate effectively if, for instance you configure it to utilize a non-existent external clock signal.

Which Are The Microcontroller PCB Design Software Available?

Here are the some of the PCB software tools that will help you in designing your microcontroller printed circuit board:

  • DipTrace
  • Eagle
  • Kicad
  • Allegro
  • Fritzing
  • EasyEda
  • PADS
  • ZenitPCB
  • PCBWeb Designer

How Do You Perform Microcontroller PCB Routing?

Routing is the succeeding step after you have completed placement of microcontroller PCB components.

There are two techniques for PCB routing: automatic and manual.

For example, to perform auto-routing using DipTrace, you just choose Route, then Run Autorouter. Consequently, the DipTrace program will automatically perform all the microcontroller PCB routing.

Regrettably, auto-routers generally perform a terrible work, and in nearly all instances it will be necessary to manually perform the routing.

If routing on microcontroller PCB, you need to shorten the length of every trace the much you can possibly achieve.

Moreover, you should equally reduce the vias number and avert any right-angle bends in the board traces.

These suggestions are particularly vital for high speed signals and high-power traces.

When routing high-current powerlines, make sure that the trace width is able to carry the needed current.

Running excess current across a PCB trace will result in overheating and melting, which in turn makes the microcontroller circuit board defective.

You should first understand the trace thickness for the intended microcontroller PCB application before determining the necessary trace width.

Typically, the thickness of most PCB conducting layers is 1 oz/ft2.

The minimum trace width accepted by most applications is 4-6 mils.

However, the broader the trace the lower the resistance, hence steadier supply voltage at every circuit board component.

Unless space is exceedingly tight, it is normally advisable to overdesign the power supply tracks.

Actually, the power supply routing should be on its specific layer to allow you optimize the routing width.

Nevertheless, the trace width requirements differ for external layers vs. internal layers.

Internal microcontroller PCB layers can conduct much lower current since they do not experience the cooling impact of being subjected to air.

As a result, less current will cause overheating of the traces.

Which Are The Important Microcontroller PCB Design Verification That You Must Perform Before Fabrication?

Verification of microcontroller PCB design is the succeeding step after completing the routing operation.

Automation perform well during this stage and any circuit board design tool will give automatic verification capabilities.

Broadly, there exists 2 types of verification including:

  • Design Rule Check (DRC)
  • Schematic Comparison

The DRC confirms that you have followed all the microcontroller PCB design processes.

This comprise of rules like minimum trace spacing, minimum spacing between board edge and a trace, minimum trace width, among others.

Before running DRC verification, you must get all the design rules associating with the specific microcontroller PCB fabrication procedure you will be employing.

Each PCB manufacturing process has modestly differing rules therefore, you should have the right rule before continuing.

With DipTrace, you specify the design rules through choosing Verification then Design Rules.

After defining all the rules correctly, you proceed to run the DRC through choosing Verification then Check Design Rules.

After the design rule verification, you then proceed to confirm whether the board design matches with schematic diagram.

To perform this using DipTrace PCB software, you simply choose Verification then Compare to Schematic.

Why Is It Important To Convert The Microcontroller PCB Layout Design Into Gerber File Format?

You can place your microcontroller PCB order after performing all the PCB verifications successfully.

However, to place the order, you should convert the PCB layout design to standard industry file format referred to as Gerber.

The Gerber format produces every PCB layer design as an independent file.

The produced layers include not only the microcontroller board conducting layers.

Some of the layers consist of:

  • Silk Layers: Comprise of text and parts designators
  • Assembly Layers: Same as silk layer though has specific assembly guidelines
  • Solder Mask Layers: Covers up any microcontroller PCB conductors that should not be soldered. This avoids accidental shorts when soldering.
  • Solder Paste Layers– Used to precisely place solder paste where soldering will occur.

Furthermore, you will equally be required to generate Pick-and-Place file that has the orientation and coordinates for all the components.

The file is important for automatic component placement.

Ultimately, you need to generate drill file that gives the precise size and location of any holes like mounting holes and vias.

You can then begin the microcontroller PCB manufacturing after generating all these necessary files.

What Are The Key Factors To Consider In Microcontroller PCB Stack-Up?

The microcontroller PCB stack-up refers to order of layers on the circuit board.

The configuration of layers influences EMI compliance of the PCB design, in addition to circuit signal integrity.

Here are the main considerations in the microcontroller PCB stack-up:

  1. Number of layers
  2. Order of layers
  3. Spacing between layers
  4. Role of each layer (plane, signal etc.)
  5. Layer thickness
  6. Cost

 Bare Microcontroller Circuit Board

Bare Microcontroller Circuit Board

How Do You Program Microncroller PCB After Fabrication?

The microcontroller PCB manual will always include a section having information on the pins related to programming.

The pins are commonly some kind of ICSP) in-circuit serial programming interface, often a JTAG these days.

You link these pins to a connector found on the microcontroller board. Subsequently, you then connect your computer into the board via a hardware known as programmer.

The programmer normally resembles a block with USB cable found on one side that runs to the computer.

Similarly, it has another cable on the opposite side having a connector for plugging to the microcontroller PCB.

Through the associated programmer software on the computer, you upload code to the board.

Likewise, some manufacturers pre-load a bootloader onto the microcontroller board.

This self-programming by the PCB through signals picked up via one of its interfaces.

Alternatively, it is possible to code and upload your bootloader to the microcontroller PCB through the programmer.

Bootloaders operate by sensing searching for particular jumpers or signal sequence on startup.

This enables them to go into bootloader mode, or else they will run their “normal” software.

Which Are The Current Languages For Programming Microcontroller PCB?

To assist you plan your board development, let’s look at the various programming languages for microcontroller PCB available:

C and Assembly

C is a common microcontroller PCB language.

It functions well due to its capability to manage memory allocation whilst also undertaking sophisticated functions like mathematical expressions, loops and if statements.

Assembly is an option to C having a few advantages. This microcontroller language usually employs code distinct to the gadget that is converted with an assembler utility software.

Assembly gives you CPU direct access enabling careful adjustment of routines for accurate timing applications.

It provides better CPU usage, in addition to sets of instructions not supported by C like bit manipulation using specific BIT instructions.


This is a smaller version of Python that is appropriate for microcontroller PCB.

It runs on the microcontroller’s bare metal utilizing a small subgroup of the conventional Python library.

MicroPython can function using just 16k RAM and 256k of space. Yet, it is engineered to be compatible with standard Python as much as possible.

Official Microcontroller PCB by MicroPython

Official Microcontroller PCB by MicroPython


Supported by Google, Blockly is a non-proprietary programming library with the aim of making code visibly logical by utilizing drag-and-drop blocks.

Here, you put blocks into a background and link them together in order to define the flow of a program.

Among the key advantages of Blockly is the almost zero possibility of occurrence of errors. This is because blocks need particular connections and will not allow connection of incompatible blocks.

Arduino C++

Arduino is essentially programmed in C++ and employs a subgroup of libraries distinct to the Arduino.

The benefit of Arduino C++ language is the fact that it is faster compared to larger languages like Python.

Moreover, it is exceptionally portable and appropriate for commercial environments.


BASIC language is known for its interpreted nature and simplicity.

When employed on a microcontroller PCB, BASIC is interpreted causing a performance penalty.

Nonetheless, high portability is the main advantage of BAIC language.

Any code you write in BASIC will run on any microcontroller PCB device with a BASIC interpreter.

What Are The Applications Of Microcontroller PCB?

The primary microcontroller PCB applications involve using them for embedded devices in the following:

  • Computer Systems
  • Hand-held metering systems
  • Automobiles
  • Mobile Phones
  • Security Alarms
  • Current meter
  • Appliances
  • Measurement Instruments
  • Cameras
  • Process control devices
  • Micro Oven
  • Industrial instrumentation devices
  • Sensing Devices
  • Safety devices
  • Washing Machines

At Venture, we offer a range of microcontroller PCB for all industrial needs.

Contact us today for all your microcontroller PCBs.

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