Thanks to their SRAM capacity, they support more complex data buffering and computational processing, and incorporate a low-power design, security mechanisms, and a wide range of peripherals. These features make them ideal for a variety of applications, especially in areas such as appliance controllers, energy monitors, alarm systems, wearable devices, personal medical equipment, home automation, and industrial sensors.
The HT32L52343/HT32L52353 microcontrollers represent significant advances in energy efficiency and security protection. In Deep-Sleep mode, power consumption is approximately 0.71 μA, while in Deep Power-Down mode it can be as low as 0.125 μA. The ERTC hardware calendar includes a digital calibration function with a resolution of 0.95 ppm. For security purposes, the devices integrate the advanced AES-128 encryption standard, a random number generator (RNG), and a CRC16/32 verification mechanism. These features effectively improve data integrity during communication and firmware updates, thereby increasing system reliability.
These MCUs operate at a speed of 48 MHz, within a voltage range of 1.65 V to 3.6 V, and have an industrial temperature range of -40 °C to 105 °C. The devices include features such as 64 KB/128 KB of program Flash memory, 12/24 KB of SRAM for data, and a 6-channel PDMA (Peripheral Direct Memory Access). Additionally, the devices provide GPIO pins that tolerate a 5 V input voltage.
A variety of peripheral resources are also included, such as a USB FS interface (with integrated transceiver), two SPI interfaces, two USART interfaces, two UART interfaces, two I²C interfaces, two SCI interfaces (ISO7816-3), several 16-bit timers (including one for motor control), hardware division, ERTC, WDT, CRC16/32, AES-128, RNG, and two comparators. The devices also offer a 12-channel SAR ADC with a conversion speed of up to 1 Msps and a fully integrated temperature sensor. Furthermore, the MCUs provide a VREF reference voltage with an accuracy of ±1% at constant temperature. Regarding packaging, the devices are available in 32-pin QFN and 48/64-pin LQFP formats, providing up to 54 GPIO pins.
Ecosystem
has recently launched its new integrated development environment, HT32 IDE. It supports the entire HT32 series of MCUs and is free to use. HT32 IDE not only allows for debugging HT32 MCUs when used with e-Link32 Pro/Lite, but also facilitates the migration of Keil MDK V5 projects to HT32 IDE. The entire HT32 series of MCUs is compatible with multiple third-party development environments, including IAR, SEGGER, and GNU. Additional development resources, such as hardware development kits, firmware libraries, and application examples, are also available. Firmware updates can be quick and easy using In-System Programming (ISP) and In-Application Programming (IAP) technologies. The entire HT32 series has passed UL/IEC 60730-1 Class B certification, and self-test programs can be provided in a Safety Test Library.
