HDSC (Huada Semiconductor) Ultra-Low Power MCUs

About Ultra-Low Power MCUs

HDSC HC32L series ultra-low power MCUs achieve sub-μA standby current with rich analog peripherals. Ideal for battery-powered IoT, wearables, and smart metering applications.

As an authorized distributor of HDSC (Huada Semiconductor), BeiLuo provides a comprehensive range of Ultra-Low Power MCUs products. These products are widely used in industrial control, automotive electronics, consumer electronics, and communication equipment. We offer a complete product line with multiple series to meet various application requirements. All products are genuine and original, backed by professional technical support and comprehensive after-sales service.

Selection Guide: How to Choose the Right Ultra-Low Power MCUs

Product List

4 products available

Part Number ↕	Core ↕	Flash ↕	RAM ↕	Standby Current ↕	Active Current ↕	Package ↕	Stock Status	Action
HC32L196KCTA-LQFP64	ARM Cortex-M0+	128KB	16KB	0.5μA with RTC	35μA/MHz	LQFP64	In Stock	View Details
HC32L176KATA-LQFP64	ARM Cortex-M0+	256KB	32KB	0.5μA with RTC	35μA/MHz	LQFP64	In Stock	View Details
HC32L072	ARM Cortex-M0+	64KB	-	0.9uA with RTC	100uA/MHz	LQFP64/QFN48	In Stock	View Details
HC32L136K8TA	ARM Cortex-M0+	64KB	-	0.7uA with RTC	85uA/MHz	LQFP64	In Stock	View Details

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Frequently Asked Questions

What is the lowest power consumption of HC32L MCUs?

HC32L ultra-low power specifications: (1) Standby mode - as low as 0.5μA with RTC running, 0.4μA without RTC

(2) Stop mode - 1-2μA with fast wake-up capability

(3) Active mode - 35μA/MHz at 3.3V

(4) Deep sleep - 0.3μA with pin wake-up

(5) Wake-up time - 4μs from stop mode, fast response to events

(6) Temperature - low power maintained across -40°C to +85°C. These specifications are among the best in the industry, comparable to STM32L0/L4 and MSP430 series. Actual power consumption depends on voltage, temperature, and peripheral usage.

Use standby mode for longest battery life. Use stop mode for balance of power and wake-up speed.

What analog peripherals are available in HC32L MCUs?

HC32L analog peripherals: (1) ADC - 12-bit SAR ADC with 1Msps, up to 24 channels, internal reference

(2) DAC - 12-bit DAC for analog output

(3) Comparators - 2-3 ultra-low power comparators with wake-up capability

(4) OPA - operational amplifiers for signal conditioning

(5) PGA - programmable gain amplifier for sensor interfaces

(6) Temperature sensor - internal die temperature monitoring

(7) Voltage reference - precision 1.2V/2.5V reference. These rich analog peripherals enable direct sensor interfacing without external components, reducing BOM cost and PCB size for IoT applications.

All HC32L series include comprehensive analog peripherals. Select based on channel count and specific features needed.

How do I maximize battery life with HC32L MCUs?

Maximizing battery life with HC32L: (1) Use standby mode - enter standby when idle, only 0.5μA consumption

(2) Optimize wake-up - use pin or RTC wake-up, minimize active time

(3) Lower voltage - operate at lowest voltage (1.8V-3.6V range)

(4) Reduce clock - use lowest clock speed for the task

(5) Disable peripherals - turn off unused peripherals

(6) Batch processing - accumulate data, process in bursts, return to sleep

(7) Use LPTIMER - low-power timer for periodic wake-up

(8) Optimize code - efficient code reduces active time. Example: Sensor reading every minute - wake up, read sensor (1ms), transmit (10ms), return to standby. Total active: ~11ms/minute, standby: ~99% time, battery life: several years on coin cell.

Spend 99%+ time in standby. Minimize active time. Optimize wake-up frequency.

What packages are available for HC32L MCUs?

HC32L package options: (1) QFN20 (3x3mm) - ultra-small for wearables and compact designs

(2) QFN32 (4x4mm) - compact with good I/O count

(3) QFN48 (5x5mm) - balanced size and peripherals

(4) LQFP32 (7x7mm) - easy prototyping and manufacturing

(5) LQFP48 (7x7mm) - standard for industrial applications

(6) LQFP64 (10x10mm) - maximum peripherals

(7) TSSOP20 - low-cost option for simple applications. QFN packages offer smallest size and best thermal performance. LQFP packages are preferred for prototyping and applications requiring easy rework. All packages are RoHS compliant.

Use QFN for compact designs. Use LQFP for prototyping. Select based on I/O and size requirements.

What LCD driver capabilities do HC32L MCUs have?

HC32L LCD driver features: (1) Segment support - up to 8 COM x 36 SEG = 288 segments

(2) Bias - 1/2, 1/3, 1/4 bias configurable

(3) Voltage - internal charge pump generates LCD voltage

(4) Contrast - software adjustable for different LCDs

(5) Waveform - Type-A or Type-B waveform selectable

(6) Low power - LCD operation continues in sleep mode

(7) Blinking - hardware support for segment blinking. Available in HC32L136, HC32L176, HC32L196 series. Enables direct LCD drive without external driver IC, reducing BOM cost for applications like smart meters, thermostats, and portable medical devices.

HC32L136/176/196 include LCD driver. Select based on segment count needed.

How does HC32L compare to STM32L0/L4?

HC32L vs STM32L comparison: (1) Power - HC32L: 0.5μA standby, STM32L0: 0.35μA, STM32L4: 0.12μA. HC32L competitive but slightly higher

(2) Performance - HC32L: 48MHz M0+, STM32L0: 32MHz M0+, STM32L4: 80MHz M4. HC32L matches L0, below L4

(3) Peripherals - All have rich analog, LCD, USB options

(4) Price - HC32L 30-50% lower than STM32L

(5) Ecosystem - STM32 larger ecosystem, HDSC growing rapidly

(6) Support - LiTong provides local HDSC support. Choose HC32L for cost-sensitive applications. Choose STM32L4 for highest performance. Choose STM32L0 for ecosystem compatibility.

HC32L offers best value. STM32L4 for highest performance. STM32L0 for ecosystem.

What is the ESD/EMI performance of HC32L MCUs?

HC32L ESD/EMI specifications: (1) ESD HBM - 4kV (typical for industrial)

(2) ESD CDM - 500V

(3) Latch-up - 100mA (JEDEC standard)

(4) EMI - meets IEC 61000-4 standards for industrial applications

(5) EFT - ±1kV on power pins

(6) Surge - ±500V. The MCUs are designed for industrial environments with robust IO cells. For harsh environments, follow HDSC's PCB layout guidelines for optimal EMI performance. Automotive variants (HC32A) have enhanced EMC for automotive OEM requirements.

Suitable for industrial applications. Follow PCB guidelines for harsh environments.

What is the minimum operating voltage for HC32L MCUs?

HC32L operating voltage range: (1) Minimum - 1.8V guaranteed operation

(2) Maximum - 3.6V absolute maximum

(3) Typical - 3.3V for optimal performance

(4) Brownout - programmable brownout detector at 1.8V/2.0V/2.5V

(5) Power-on reset - ensures clean startup

(6) Battery operation - works well with 3V coin cells (CR2032) and 3.7V Li-ion. The wide voltage range enables operation from various battery chemistries. At 1.8V, maximum clock speed may be reduced. For best performance, operate at 2.4V-3.6V range.

Operates from 1.8V to 3.6V. Use 3.3V for optimal performance.

How do I program HDSC MCUs?

HDSC MCU programming methods: (1) SWD interface - Serial Wire Debug, 2-wire interface (SWDIO, SWCLK)

(2) Bootloader - UART or USB bootloader for firmware updates

(3) Tools - HDSC-Link (low-cost), J-Link, ULINK

(4) IDEs - IAR, Keil, HDSC Studio all support programming

(5) Production - gang programmers available for volume production

(6) Security - readout protection prevents firmware theft. For development, use SWD with debugger. For field updates, use UART/USB bootloader. For production, use gang programmer or automated test equipment with SWD.

Use SWD for development. Use bootloader for field updates.

What is the Flash endurance and retention for HC32L?

HC32L Flash specifications: (1) Endurance - 100,000 erase/program cycles minimum per sector

(2) Retention - 10 years data retention at 85°C

(3) Sector size - 512 bytes or 1KB depending on model

(4) Programming - word (32-bit) programmable

(5) Erase - sector erase required before programming

(6) Data Flash - some models have dedicated data Flash with higher endurance (1M cycles). The standard Flash endurance is sufficient for firmware storage and occasional parameter updates. For frequent data logging, use external EEPROM or select models with data Flash.

100K cycles sufficient for firmware. Use external EEPROM for frequent data storage.