The Holtek HT32F54231/HT32F54241/HT32F54243/HT32F54253 devices are high performance, low power consumption 32-bit microcontrollers based around an Arm® Cortex®-M0+ processor core. The Cortex®-M0+ is a next-generation processor core which is tightly coupled with Nested Vectored Interrupt Controller (NVIC), SysTick timer and including advanced debug support.

The devices operate at a frequency of up to 60 MHz with a Flash accelerator to obtain maximum efficiency. It provides up to 128 KB of embedded Flash memory for code/data storage and up to 16 KB of embedded SRAM memory for system operation and application program usage. A variety of peripherals, such as Hardware Divider DIV, PDMA, ADC, I2C, USART, UART, SPI, GPTM, SCTM, BFTM, MCTM, CRC-16/32, RTC, W DT, Touch key, LED controller and SW-DP (Serial Wire Debug Port), etc., are also implemented in the device series. Several power saving modes provide the flexibility for maximum optimization between wakeup latency and power consumption, an especially important consideration in low power applications.

The above features ensure that the devices are suitable for use in a wide range of applications, especially in areas such as washing machines, refrigerators, electric pressure cookers, high-speed blenders, rice cookers and so on.

Features:

• 32-bit Arm® Cortex®-M0+ processor core
• up to 60 MHz operating frequency
• 64 KB on-chip Flash memory for instruction/data and options storage
• 8 KB on-chip SRAM
• single VDD power supply: 2.5 V to 5.5 V
• integrated 1.5 V LDO regulator for MCU core, peripherals, and memories power supply
• supports 8-segment digital displays up to a maximum of 12
• keys are organized into several groups, with each group known as a module
• each module is a fully independent set of four Touch Keys and each Touch Key has its own oscillator

Specification:

• max. frequency: 60 MHZ
• VDD: 2.5 ~ 5.5 V
• flash: 64 KB
• SRAM: 8 KB
• PDMA: 6 CH
• ADC: 1 Msps, 12-bit x10
• timer: BFTMx2, SCTMx4, GPTMx1, MCTMx1
• interface: USARTx2, UARTx4, SPIx2, I2Cx3
• others: CRC, DIV, LEDC
• I/O: 54
• package: LQFP48