LGT8F328P MiniEVB Development Board Replace Pro Mini ATMega328P 32MHz

LGT8F328P MiniEVB board, drop-in replacement for Arduino Pro Mini. 32MHz, 32KB Flash, 2KB SRAM, 12-bit ADC+8-bit DAC. 3.3V/5V selectable, Arduino IDE compatible, built-in precision RC oscillator. Perfect for low-power DIY projects

LGT8F328P MiniEVB Development Board Application Features

Main Controller

◆ Main Chip
LGT8F328P (LogicGreen LGT8XP enhanced RISC core) 

◆ Operating Frequency
Up to 32MHz (built-in high-precision RC oscillator) 

◆ Operating Voltage
1.8V ~ 5.5V (onboard 3.3V/5V selectable) 

◆ Instruction Set
131 instructions, over 80% single-cycle 

Memory

◆ Flash
32KB (programmable program memory) 

◆ SRAM
2KB 

◆ EEPROM
Flash emulation, byte access support 

Analog Peripherals (Key Upgrades)

◆ ADC Resolution
12-bit (significantly better than ATmega328P's 10-bit) 

◆ DAC
8-bit digital-to-analog converter (not available on ATmega328P) 

◆ Internal Reference
1.024V/2.048V/4.096V ±1% high precision voltage reference 

◆ PGA
Programmable gain amplifier with differential input 

◆ Analog Comparator
2 high-speed high-precision comparators 

Digital Peripherals

◆ Timers
2×8-bit + 2×16-bit independent prescaler timers 

◆ PWM Output
Up to 9 channels with complementary programmable dead-time control 

◆ Communication Interfaces
USART, SPI (master/slave), I2C (master/slave) 

◆ High-Current Drive
6 high-current push-pull I/Os for high-speed PWM applications 

Onboard Resources

◆ Voltage Selection
3.3V / 5V switchable via solder pad 

◆ Oscillator
Built-in 32MHz high-precision RC oscillator, no external crystal needed 

◆ Low Power
Built-in 32KHz low-power RC oscillator 

◆ Debug Interface
SWD on-chip debugger 

◆ Unique ID
Built-in GUID for program encryption 

Pin Definition

◆ Power Pins
VCC / GND / VIN

◆ Communication Pins
TX / RX (UART)

◆ Reset Pins
DTR / RST (auto-reset support) 

◆ Digital I/O
Pro Mini compatible pin layout

Physical Specifications

◆ Board Dimensions
Approx. 31×18mm (comparable to Pro Mini) 

◆ Package Type
LQFP32 (chip package) 

◆ Mounting Type
Surface mount 

◆ Weight
Approx. 10g 

Development Support

◆ IDE Support
Arduino IDE (requires lgt8fx board package) 

◆ Driver Support
Windows/Mac/Linux

◆ Bootloader
Pre-installed Arduino compatible bootloader

◆ Programming
USB to TTL serial download (CH340/CP2102 required) 

Applications

◆ Target Users
Arduino developers, makers, DIY enthusiasts

◆ Typical Applications

• Low-power sensor nodes

• Portable instruments

• Motor control (PWM)

• Audio processing (DAC output)

• High-precision analog acquisition (12-bit ADC)

• Battery-powered devices (1.8V ultra-low voltage operation)

Key Advantages

◆ Higher Performance
32MHz vs ATmega328P's 16MHz 

◆ Higher ADC Resolution
12-bit vs 10-bit 

◆ Built-in DAC
8-bit analog output, no external components needed 

◆ Precision Reference
±1% high-precision voltage reference 

◆ Low Power
1μA power-down current @ 3.3V 

◆ Program Encryption
Built-in GUID for code protection 

◆ Cost-Effective
Significantly lower cost than ATmega328P

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Notes : Since the prices of the electronic components are unstable, the prices we show are for reference only. Please confirm the recent prices with us before ordering!

Lead Time : Usually, your parcel will be arranged within 7 days after finishing payment. We'll send it more quickly if it's an urgent order. Thanks for your understanding!

Quantity(Pieces)	1 ~ 30000	30001 ~ 300000	> 300000
Est. Time(days)	5	7	To be negotiated

FAQ:

1. What is the LGT8F328P MiniEVB development board and its key specifications?
   The LGT8F328P MiniEVB is an enhanced, drop‑in replacement for the classic Arduino Pro Mini. It is built around the LGT8F328P microcontroller, which is binary‑compatible with the ATmega328P but offers significant hardware improvements. Key specifications: 32 KB Flash, 2 KB SRAM, 1 KB EEPROM, a maximum internal oscillator frequency of 32 MHz (vs. 16 MHz on the Pro Mini), a 12‑bit ADC (vs. 10‑bit), an 8‑bit DAC, an on‑chip 3.3 V LDO regulator, 4× 16‑bit timers, a true random number generator, and hardware multiplication/division. The board shares the same compact form factor, pinout, and voltage options (3.3 V/5 V) as the Pro Mini, making it an ideal high‑performance upgrade for space‑constrained projects.

2. How is the LGT8F328P MiniEVB different from a standard Arduino Pro Mini (ATmega328P)?
   The LGT8F328P board is pin‑compatible but significantly more powerful. The main improvements are: double the clock speed (32 MHz vs 16 MHz) using the internal oscillator, a 12‑bit ADC (4 × finer resolution), an on‑chip 8‑bit DAC (absent on the ATmega328P), built‑in 3.3 V regulator (supplies up to 150 mA to external components), hardware math acceleration, and lower power consumption. Unlike the Pro Mini, which requires an external USB‑to‑serial adapter for programming, some MiniEVB versions include an on‑board USB‑C port for direct programming. All existing Arduino libraries and sketches run without modification.

3. Is the LGT8F328P MiniEVB fully compatible with the Arduino IDE and libraries?
   Yes, it is fully compatible. You must install the LGT8F328P board package (provided by Logic Green or the community) in the Arduino IDE. After installation, select the board “LGT8F328P” and choose the clock speed (32 MHz internal is recommended). All standard Arduino functions — digitalWrite, analogRead, Serial, PWM, attachInterrupt — work exactly as on an ATmega328P. The vast majority of third‑party libraries are also compatible. The programming method depends on the board variant: if it has a USB‑C port, you can upload directly via USB; otherwise, you use an external USB‑to‑serial adapter (just like the Pro Mini).

4. What are the ADC and DAC specifications? How do they compare to the ATmega328P?
   The LGT8F328P features a 12‑bit successive‑approximation ADC with up to 8 multiplexed inputs, providing a resolution of 0–4095 — four times finer than the ATmega328P's 10‑bit ADC (0–1023). It also includes a programmable gain amplifier (PGA) with gains of 1×, 2×, 4×, and 8×, and an internal 1.024 V precision voltage reference. The 8‑bit DAC on pin PD4 (digital pin 4) can output a true analog voltage between 0 V and the reference voltage, which the ATmega328P completely lacks. This makes the MiniEVB far better suited for precision sensor reading and analog signal generation.

5. How do I power the LGT8F328P MiniEVB, and what is the built‑in 3.3 V regulator?
   The board can be powered in several ways: through the RAW pin (accepts 4.5 V – 12 V DC, regulated down to 3.3 V or 5 V by the on‑board LDO), through the VCC pin (a regulated 3.3 V or 5 V, depending on the board variant), or via the USB‑C port (if equipped). A standout feature is the on‑chip 3.3 V LDO regulator built into the LGT8F328P chip itself. This regulator can supply up to 150 mA to external 3.3 V sensors and modules directly from the chip's 3.3 V output pin, eliminating the need for an external regulator. This greatly simplifies battery‑powered and mixed‑voltage designs.

6. What is the maximum clock speed, and do I need an external crystal?
   The LGT8F328P can run at up to 32 MHz using its internal calibrated RC oscillator. No external crystal is needed — the internal oscillator has sufficient accuracy (typically ±1 % at room temperature) for UART communication and most applications. If higher precision is required, you can still connect an external 16 MHz crystal. The 32 MHz internal clock gives approximately 2× the processing speed of a standard 16 MHz Pro Mini, significantly boosting performance for math‑intensive or real‑time tasks.

7. How do I program the LGT8F328P MiniEVB? Do I need a special programmer?
   If your MiniEVB has a USB‑C port, you can program it directly via USB — the on‑board bootloader handles the upload, just like an Arduino Uno. If your board does not have a USB port, you use a standard USB‑to‑serial adapter (FTDI or CH340) connected to the board's TX, RX, VCC, and GND pins, exactly as you would with a Pro Mini. You can also use an ISP programmer (e.g., USBasp) via the ICSP header. The bootloader is Optiboot‑based and works seamlessly with the Arduino IDE. No special programmer is required.

8. Is the power consumption lower than the ATmega328P Pro Mini?
   Yes. Thanks to a more modern fabrication process, the LGT8F328P consumes less power. In active mode at 16 MHz and 5 V, it draws about 4 mA – 5 mA, compared to ~10 mA for the ATmega328P. In power‑down sleep mode, the current drops to < 1 µA. The chip also supports several low‑power modes with wake‑up from external interrupts or the watchdog timer. This makes it an excellent choice for battery‑powered sensors, wearables, and remote IoT nodes where long battery life is critical.

9. What are the main differences between the 3.3 V and 5 V versions of the MiniEVB?
   The LGT8F328P MiniEVB is available in two voltage variants: 3.3 V / 8 MHz and 5 V / 32 MHz. The 5 V version runs at the full 32 MHz and provides 5 V logic levels, making it directly compatible with most Arduino shields and 5 V sensors. The 3.3 V version runs at a lower clock speed (typically 8 MHz for stability) and uses 3.3 V logic, which is ideal for interfacing with modern low‑voltage sensors, ESP modules, and battery‑powered systems. The chip's built‑in 3.3 V regulator is available on both variants. Choose the voltage that matches your peripherals to avoid the need for level shifters.

10. What is the pinout, and is it the same as the Arduino Pro Mini?
    Yes, the MiniEVB follows the exact same pinout as the classic Arduino Pro Mini. It provides 14 digital I/O pins (D0–D13), of which 6 support hardware PWM (D3, D5, D6, D9, D10, D11). There are 8 analog input pins (A0–A7). Communication interfaces: UART (TX/RX on D0/D1), I2C (SDA/SCL on A4/A5), and SPI (D10–D13). The board also breaks out RESET, VCC, GND, and RAW pins. The DAC output is on PD4 (digital pin 4). The small form factor (33 mm × 18 mm) is identical to the Pro Mini, so it fits all existing enclosures and carrier boards.

11. What are the most typical applications for the LGT8F328P MiniEVB?
    It is a direct, higher‑performance replacement for the Arduino Pro Mini in virtually all applications: wearable devices, IoT sensor nodes, miniature robotics, battery‑powered data loggers, USB‑HID projects (keyboard/mouse emulation), audio generators (using the DAC), and space‑constrained embedded controllers. Its high speed, better ADC, integrated DAC, and low power consumption make it particularly attractive for new designs that need more capability without increasing size or cost.