The integrated 16-bit D/A converter and Audio Power Amplifier meet the demands for high-quality voice and provide users with touch key and voice product solutions. Additionally, the speaker output is controlled by an internal digital volume control function instead of using external variable resistors. With their highly integrated SoC solutions, these devices can have a master control MCU, touch key and voice functions implemented in the same MCU.

By using the SPI interface to connect to external SPI Flash Memory, the voice data can be easily read. According to their different voice application requirements, such as voice quality, voice length and voice change, etc., users can flexibly select different capacities of external standard SPI Flash Memory. The BS66FV3x0 series can be used in products which include both touch keys and voice functions, such as home appliances, normal consumer products, health care products, etc.

The BS66FV340/350/360 devices have I2C, SPI and UART interfaces as well as integrated high accuracy RC oscillators. Containing 20, 24 or 28 touch keys and in addition to the advantages of the previous generation devices, these new devices have an enhanced touch detection rate and improved anti-interference abilities.

Their internal LED drivers support four segments with current output control which can drive LED displays directly without requiring additional external current-limiting resistors or transistors, reducing the number of external components and reducing costs extensively. The software controlled LCD driver extends the application area to include LCD display products.

During product development, by also providing an e-Link coupled with an OCDS (On Chip Debug Support) EV device as well as Holtek’s new touch key software development platform (Touch MCU Workshop), users have all the tools to hand to ensure rapid touch key product development.

Regarding voice product development, users can use the professional mode of the new voice development platform (Voice MCU Workshop) to generate a voice file, which will be programmed into the external SPI Flash Memory. A function library, which can be added to the touch key project, can then be called to implement the voice function.