The device contains a 32KB Flash Program Memory and a 4KB SRAM Data Memory. With regard to one-shunt FOC and square wave sensor-less control, the device includes an OCP function (OPA and CMP0) and a comparator CMP1, a 12-channel 2Msps SAR ADC, powerful MCTM, GPTM, hardware divider and other peripheral functions. Additionally, there are a range of communication interfaces including UART, USART, I²C and SPI, which can be combined with the 6-channel PDMA and CRC16/32 functions to improve communication response and security.

The device is supplied in 32-pin QFN(4×4) and 48-pin LQFP package types, which contain up to 44 GPIO pins. Holtek also provides an HT32 Series BLDC Workshop to reduce the product development and evaluation time for motor related products with both Hall sensors and sensor-less FOC control.