Home News HOLTEK HT32F67233: New micro Arm® Cortex® – M0+ with Sub-1GHz GFSK Transceiver 

HOLTEK HT32F67233: New micro Arm® Cortex® – M0+ with Sub-1GHz GFSK Transceiver 

Holtek's new MCU dedicated to wireless communication, an Arm® Cortex®-M0+ core Sub-1GHz OOK/GFSK transceiver, the HT32F67233. The device operates in the license-free ISM bands of 315/433/470/868/915 MHz, with voltages from 2,0V~3,6V, and is suitable for very low power consumption wireless two-way transmission applications, such as industrial control (meters and data logging), smart home appliances (security products, sensors and alarm systems), remote control, industrial/agricultural automation, data acquisition and logging, etc.

The RF module is a high performance, low cost OOK/GFSK transceiver for wireless applications in the ISM bands. It incorporates a highly integrated sub-1GHz transceiver and baseband modem with programmable GFSK data rates from 2Kbps to 250Kbps and OOK data rates from 0,5Kbps to 20Kbps. Data handling features include TX/RX 64-byte FIFO and packet handling such as CRC generation, forward error correction and data whitening, Manchester encoding.

holtek table

The device has an operating frequency of up to 40 MHz, contains 32 KB Flash memory, 4 KB SRAM, and provides a maximum RF transmit power of +20 dBm. A low noise, low IF receiver can achieve a sensitivity of -117 dBm from a data rate of 2 Kbps in 433 MHz bands. Its receive current can be as low as 5,8 mA at 433 MHz and offers a TX output power of +19 dBm with a current draw of 71 mA. It integrates a class E power amplifier that can offer an output power of up to +20 dBm in the 433/868 MHz bands.

The device also includes an Auto-Transmit-Receive (ATR) function, plus both the loop filter and XO charge capacitors are integrated on-chip to minimize the need for external components.

Regarding the interfaces, it contains 21 GPIO pins and multiple communication/peripheral interfaces, such as ADC, I2C, USART, UART, SPI, GPTM, SCTM, BFTM, WDT, SW-DP (Serial Wire Debug Port), etc. ., implemented on the device. Various power-saving modes provide the flexibility for maximum optimization between wake-up latency and power consumption, an especially important consideration in very low-power applications.

It is supplied in a small size (46mm × 6.5mm × 4.5mm) 0.75-pin QFN-style package.

Development tools, in addition to the manufacturer's own, are also available:

  • KEIL IDE, supports it for free
  • Debugger: commercials for Cortex M0+ families.

For any technical or commercial question you can contact Mecter SL