August 20, 2012 -- Following last year's successful release of Holtek Semiconductor, Inc.'s HT32F125x series 32-bit Flash MCU devices using the ARM Cortex-M3 core, Holtek has now announced the release of new advanced additions to the 32-bit device range, the HT32F1755/ 1765/ 2755 series.

These new 32-bit Flash devices include features such as a high operating speed of up to 72MHz, a single power supply with an operating voltage range of 2.7V to 3.6V and an industrial temperature range of -40°C to 85°C. With Holtek's ISP (in-system programming) and IAP (in-application programming) integrated functions, users will find the implementation of software upgrades an easy and quick process,enhancing the efficiency and flexibility to the products.

The HT32F1755/ 1765/ 2755 series devices contain 128kBytes of Flash Program Memory and 32kBytes to 64kBytes of SRAM data memory together with a newly designed 12-channel PDMA for higher-efficiency applications. The integrated timer module can implement functions such as timer/ counter, capture, compare, single-pulse output, PWM modes and also provide QEI, Hall sensor interface features and special complementary PWM outputs. Together with an 8-channel 12-bit 1-MSps high-speed ADC, these new devices can meet the requirements of three-phase motor-control applications. With the HT32F2755 device, Holtek provides an additional high-speed CMOS sensor camera interface with the frame rate up to 30fps for QVGA (320x240) format.

The devices provide multiple power-saving management modes, power-on reset (POR), multi-level low-voltage detection (LVD), brown-out detection (BOD), etc. In addition to an external crystal oscillator, the devices also contain accurate internal RC oscillators that provide both 8-MHz and 32-kHz frequency clock sources. An internal clock-monitor function is used to automatically switch to the internal oscillator when an invalid external crystal oscillator situation arises.

The devices are supplied in 48/ 64/ 100-pin LQFP package types and contain up to 33/ 46/ 80 GPIO pins. Additional functions include a USB 2.0 FS device interface, two USART interfaces, two SPI interfaces, two I2C interfaces, real-time clock, operational amplifiers, and comparators. These devices are suitable for a wide range of applications such as fingerprint recognition, three-phase motor control, medical products, computer peripherals, home appliances, personal health-care products, portable devices and so on.

The HT32F1755/ 1765/ 2755 series devices are well supported by IDE suppliers such as IAR, Keil and CooCox. Holtek also provides its own low-cost development tools, a debugging adaptor e-Link32, an extensive software program library as well as the application development handbooks.

Posted by: John Miklosz