Date: 21/09/2010

New industrial grade qualified A/D type flash MCUs from Holtek

Holtek has released a new series of ultra low power consumption A/D type Flash MCUs, the HT45F23 and HT45F43. Both MCUs meet the industrial grade specified temperature range of -40°C ~ +85°C and have good noise immunity. These MCUs use Holtek's Tinypower technology that reduces power consumption. The MCUs use the In-Circuit Programming function to implement program upgrades while the internal EEPROM Memory can be used to store data such as calibration information or other data, which will be retained even after power removal. The data can be programmed during either the production process or during normal device operation.

The MCUs contain a Flash Program Memory capacity of 2K words, a Data Memory EEPROM capacity of 64 bytes, 128 bytes of SRAM Data Memory, 22 I/O ports and a 6 channel 12-bit high speed A/D Converter, which can implement an A/D conversion cycle within 16 A/D Converter clock cycles. Further analog functions include two internal Comparators along with two Operational Amplifiers with a PGA function, allowing their gain to be setup using the application program between a range of 1~56.

The oscillator functions in the devices include high frequency crystal, external RC oscillators, 32768Hz crystal oscillator and a fully integrated RC fixed frequency oscillator. This latter internal RC oscillator offers a choice of 5 different frequency selections and has an accuracy of up to ±2% (under constant temperature and voltage) and requires no external components. A 4-level Low Voltage Reset and 8-level Low Voltage Detector provide additional features to safeguard the MCU against malfunction due to noise interference. These devices feature an internal SPI/I2C interface with a 12-bit DAC to open up possibility of easy voice function implementation.

In the area of packaging, the devices are provided in 16-pin NSOP, 20-pin SSOP and 24-pin SSOP package formats. The ultra low power consumption and high level of functional integration in the devices make them extremely suitable for products with low power, small area and low cost requirements. Such application areas include home security products, power-saving electrical appliances, portable products, industrial control products, consumer electronics and automotive peripheral products to name but a few.

The new series of Holtek microcontroller devices are fully supported by Holtek's suite of Windows based HT-IDE300 functional hardware and software development tools. The tools include a hardware In-circuit Emulator complete with functions such as breakpoint setting, trace analysis etc. as well as an integrated device programmer.