Refrigerator intelligence control peak! Hang Shun HK32M070 refrigerator scheme opens the future fresh life

I. Market Size and Growth 

In recent years, the global refrigerator market has shown a steady growth trend. In 2023, the global refrigerator market size was approximately US\$35.31 billion, and it is expected to have a compound annual growth rate of 4.57% over the next 7 years, reaching US\$48.28 billion in 2030. In addition, the global refrigeration equipment market size increased from US\$92.46 billion in 2019 to US\$107.67 billion in 2024, and is expected to reach US\$137.31 billion in 2027, with a compound annual growth rate of 8.4% from 2024 to 2027. 

II. Market Applications 

As an indispensable home appliance in people's daily lives, refrigerators are widely used in homes and commercial places. In homes, refrigerators are not only used for food preservation and storage, but are also gradually becoming an important part of smart home systems. Through connection with mobile phones and other terminal devices, they can achieve remote control and intelligent management. In commercial areas, such as supermarkets, convenience stores, and restaurants, a large number of refrigerators are used to display and store various foods and beverages, placing higher demands on the refrigeration effect, stability, and energy efficiency of refrigerators. 

III. Solution Overview 

The Hangsoon HK32M070 refrigerator solution is designed to meet the high-performance and intelligent needs of modern refrigerators. Based on the Hangsoon HK32M070 series MCU, combined with rich peripheral devices and advanced control algorithms, this solution provides refrigerators with precise temperature control, efficient energy consumption management, intelligent fault diagnosis, and convenient user interaction. 

IV. Core Advantages of the Solution 

(1) High-Performance Computing Power: With a main frequency of up to 64MHz and an efficient instruction set, it can quickly process various control tasks of the refrigerator, such as temperature acquisition, defrosting control, and fan speed adjustment, ensuring stable and smooth operation of the refrigerator. 

(2) High-Precision Analog Peripherals: Built-in 12-bit ADC can accurately acquire parameters such as internal temperature and humidity of the refrigerator, achieving more precise temperature control and effectively maintaining food freshness. 

(3) Rich Communication Interfaces: It has multiple communication interfaces such as UART, SPI, and I2C, which can easily connect and transmit data with the refrigerator's display panel, sensors, and Wi-Fi modules, realizing intelligent functions such as remote control and intelligent interconnection. 

(4) Flexible Motor Drive Control: Supports multiple motor drive methods, enabling efficient control and speed regulation of refrigerator fans, compressors, and other motors, improving refrigeration efficiency and reducing energy consumption. 

(5) Low-Power Design: Multiple low-power modes can be flexibly switched according to the actual operating status of the refrigerator, effectively reducing standby power consumption and operating power consumption, meeting the requirements of energy saving and environmental protection. 

(6) High Integration and Reliability: Integrating multiple functions into a single chip reduces the number of external components, improving system reliability and stability while reducing production costs and development difficulty. 

Product System Block Diagram 

Refrigerator Physical Diagram

Hangsoon HK32M070 Series MCU Main Specifications 

• CPU Core 
• ARM® Cortex®-M0 
• Maximum Clock Frequency: 64MHz 
• 24-bit System Tick Timer 
• Operating Voltage Range 
• Single Power Domain (Main Power VDD): 2.2V~5.5V 
• Operating Temperature Range: -40°C ~ +105°C 
• Typical Operating Current 
• Run Mode (Run) 
• - 2.01mA@5V@8MHz 
• - 4.28mA@5V@64MHz 
• Sleep Mode (Sleep) 
• - 1.16mA@5V@40kHz 
• - 2.01mA@5V@8MHz 
• - 2.13mA@5V@64MHz 
• Stop Mode (Stop) 
• - Normal Stop Mode (Normal): 0.19mA@5V@40kHz 
• - Low-Power Stop Mode (Low-Power): 0.04mA@5V@40kHz 
• Memory 
• 32 Kbyte Flash 
• - When the CPU main frequency is no higher than 24MHz, it supports 0 wait-state bus cycle access to Flash. 
• - Flash has data security protection function, and read protection and write protection can be set separately. 
• 4Kbyte SRAM 
• Clock 
• On-chip High-speed Clock (HSI): 8/64MHz 
• On-chip Low-speed Clock (LSI): 40kHz 
• GPIO External Input Clock: ≤ 32MHz 
• Reset 
• External Pin Reset (NRST Pin) 
• Option Byte Loader Reset 
• Window Watchdog Counter Termination (WWDG Reset) 
• Independent Watchdog Counter Termination (IWDG Reset) 
• Power Reset (POR/PDR/BOR) 
• Software Reset (SW Reset) 
• GPIO Port 
• Supports up to 30 GPIO ports 
• Data Communication Interface 
• 2 UARTs 
• 1 I2C 
• - 1MHz / 400kHz / 100kHz transmission mode 
• 1 High-speed SPI 
• - Maximum transfer rate of 18Mbps 
• Timer 
• 1 x 16-bit advanced timer for motor (ATU) 
• - 3-channel complementary PWM output, all with PWM asymmetric dead time 
• - Supports 6 independent PWM outputs 
• - Supports external pin signal braking and internal comparator output signal braking 
• - Supports two independent trigger signals to trigger ADC synchronous sampling 
• - Supports ADC dual-group sampling mode trigger 
• 2 x General-purpose timers (UTU1 is 32-bit, UTU2 is 16-bit) 
• - Supports 2 independent PWM output modes 
• - Supports 1 complementary PWM output mode 
• - Supports single-trigger ATU or another UTU 
• - Supports periodic trigger ADC sampling 
• 1 x 24-bit Hall timer (HTU) 
• - Supports three-channel Hall signal input 
• - Hall phase sequence detection 
• - Phase averaging timing function supports 2/4/8 phase averaging 
• - HTU and comparator CMP linked counting 
• Division and square root unit (DVSQ) 
• Supports 32-bit fixed-point division, obtaining both quotient and remainder simultaneously 
• Supports high-precision 32-bit fixed-point square root 
• On-chip analog circuits 
• 1 x 12-bit dual-channel SAR ADC (up to 14 external analog signal input channels, corresponding to 16 external pins) 
• - 12-bit resolution 
• - Maximum conversion frequency: 2.285MSPS 
• - The ADC has programmable sampling time, and the sampling time of each sampling channel can be configured independently. 
• - Converted data supports left and right alignment. 
• - Supports internal analog circuit sampling (PGA1_OUTA, PGA1_OUTB, PGA2_OUT, VDIV_OUT, internal temperature sensor, internal reference voltage) 
• - Supports two sampling groups (customizable sampling channels) 
• - Supports software trigger and multiple hardware trigger sources (ATU's TRG0 and TRG1, UTU1/2, CMP, etc.) 
• - Supports analog window comparison function 
• - The sampling group has independent channel data result registers 
• - Supports oversampling averaging function 
• - VREFP internal supply voltage selectable: 2.4V, 3.6V, and VDDA can be selected as the reference voltage for the ADC 
• Internal reference voltage VREFINT (i.e., BGV) 
• - Internal reference voltage output connected to the independent channel of the ADC 
• 2 x Voltage comparators 
• - The reference voltage of the comparator can come from the external signal input or the internal voltage divider VDIV 
• - The output of the comparator can be used as the brake of the advanced timer ATU 
• - Supports BEMF internal center point detection 
• - Supports PWM blank signal shielding function from ATU 
• 2 x Programmable operational amplifiers 
• - Gain ratio (x1, x4, x8, x12, x20, x40) programmable 
• - Supports built-in bias voltage for P-end input 
• - PGA1 supports polling amplification of two sets of input signals 
• - Op-amp output directly to ADC sampling 
• 96-bit chip UID identification 
• Used as serial number and security key 
• Activate secure boot process 
• CPU trace and debug 
• SWD debug interface 
• ARM® CoreSight™ debug components (ROM-Table, DWT, and BPU) 
• Custom DBGMCU debug controller (low-power mode simulation control, debug peripheral clock control, debug and trace interface allocation) 
• Reliability 
• Passed CDM 2000V/HBM 6000V level test

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