MCU Products
Professional microcontroller solutions for your applications
The HT68RV033 is an 8-bit high-performance RISC architecture microcontroller with One-Time Programmable (OTP) memory, specifically designed for versatile voice applications in smart home appliances and consumer electronics. The device features integrated RAM Data Memory and 4Mbit Voice Flash Memory, ensuring ample storage for high-quality voice prompts.
Audio & Integration Distinct from standard MCUs, the device integrates a Delta-Sigma PWM driver with wide-range digital programmable volume control, capable of directly driving speakers with superior audio quality. It fully supports the Peripheral IC mode, enabling easy voice editing and programming via the Holtek Voice Workshop platform.
Power & Clock System To minimize external components, the device features fully integrated high and low-speed system oscillators, requiring no external crystal. It also includes an internal LDO to provide stable power to the Voice Flash Memory. Users can dynamically switch between different operating modes to optimize power consumption based on application needs.
Interface & Reliability Communication with the host system is streamlined via fully integrated SPI and I²C interfaces. Reliability is ensured through robust protective features, including an internal Watchdog Timer (WDT), Low Voltage Reset (LVR), and excellent noise immunity with ESD protection, guaranteeing stable operation even in hostile electrical environments.
Features
High-Fidelity Voice Output
- - Direct Speaker Drive: Integrated Delta-Sigma PWM driver delivers powerful audio (>0.65W @ 5V), driving speakers directly without external amplifiers for loud, crystal-clear voice prompts.
- - Rich Voice Storage: Built-in 4Mbit Voice Flash stores up to 170 seconds of voice data, perfect for multi-language instructions and detailed health advice.
Compact & Cost-Effective
- - Zero External Components: Integrated LDO and High-Precision Oscillator eliminate the need for external crystals or power components, reducing BOM cost.
- - Tiny Footprint: Available in a space-saving 8-pin SOP package, ideal for compact handheld medical devices.
Easy System Integration
- - Simple Control: Operates in Peripheral IC Mode, allowing the main MCU to control voice playback via a simple 2-wire interface, minimizing software overhead.
