KT148A Voice Chip - Core Solution for Smart Voice Interaction in Electronic Pill Boxes

I. Core Chip Features: Voice Capabilities Tailored for Electronic Pill Boxes

As a 32-bit DSP voice chip, KT148A, with its SOP8 compact package (4.7mm×5.1mm) and cost-effectiveness, is an ideal choice for voice interaction in electronic pill boxes. Its core parameters are fully adapted to medical device requirements:

• Storage and Battery Life Balance: Built-in 420KByte storage supports up to 420 seconds of voice content (at 8KHz sampling rate), capable of storing multi-language medication reminders (e.g., "Time to take medicine", "Insufficient medicine"); standby current is as low as 25uA, and ultra-low voltage mode (triggered by F0 command) consumes only 1.7uA, enabling over 6 months of battery life with a button cell.

• Hardware Driving Capability: 16-bit PWM output directly drives an 8Ω/0.5W speaker without an external power amplifier; operating voltage ranges from 2.0V to 5.5V, compatible with lithium batteries (3.3V-4.2V) and dry cell power supplies.

• Industrial-grade Reliability: Operating temperature -40℃~85℃, with 4kV ESD contact discharge resistance, meeting the stability requirements of medical devices.

II. Key Applications in Electronic Pill Boxes

1. Precise Medication Reminders

   Through the one-wire communication protocol (6ms low-level start signal + 8-bit data transmission), KT148A can receive MCU trigger commands and play voice prompts at preset times. It supports "interrupt playback" - if the user does not respond promptly, the F2 command can realize cyclic reminders until confirmation.

2. Real-time Operation Feedback

   Combined with the pill box's lid sensor and margin detection circuit, KT148A can output scenario-based voice in real-time:

   • Triggers "Pill box opened, please take medicine" when opened (corresponding to voice address 0x01)

   • Triggers "Please refill medicine" when insufficient (corresponding to voice address 0x02)

   • Triggers "Please close the pill box" after taking medicine (corresponding to voice address 0x03)

3. Flexible Voice Customization

   Users can update voice content independently via PC tools: convert WAV files to F1A format, connect to the chip's PB1/RX pin via a USB-TTL module (CH340G), and complete programming in download mode (Pin5 grounded during power-up) without professional equipment. Supports 224 voice addresses, expandable to more via F4 command (e.g., multi-language versions).

III. Advantages in Development and Mass Production

• Minimal Circuit Design: The reference circuit only requires an external 105 filter capacitor (VDDIO pin) and 1K current-limiting resistor (communication pin), reducing PCB area requirements.

• Quick Debugging Support: Provides logic analyzer waveform examples (e.g., 0x01 command waveform) and MCU reference code (one-wire sending function) to shorten development cycles.

• Mass Production Guarantee: Supports batch pre-programming of voice content, and provides test boards (with 8Ω speakers) for functional verification before delivery, with a defect rate below 0.1%.