BLE Voice

  Looking for a 1-minute voice chip that allows self-downloading and sound replacement? If you're looking for a voice/audio playback chip with around 1 minute of storage , and you need to be able to download and replace the audio content yourself , then OTP-type chips (One-Time Programmable) on the market are not suitable . You'll need to use a Flash-type voice chip instead. In this case, we recommend the KT148A (SOP8 package) voice chip, which can directly drive a 0.5W speaker . You can refer to the minimum system circuit for detailed hardware design. 🔹 Key Features of the KT148A Chip High Cost-Performance Ratio KT148A adopts an advanced manufacturing process, significantly reducing cost while supporting repeated reprogramming , which improves overall value. Large Storage Capacity Built-in 420 KBytes of voice memory, supporting up to 420 seconds of audio playback — suitable for various applications. Multiple Interface Options Provides I²C, SPI, and UART ...

  🤖 AI Quick Insight The BUSY pin on the KT142C chip enters a 2 μA ultra-low-power state about 5 seconds after becoming idle. At this point, the pin goes high-impedance , so a measured voltage of around 0.2 V is normal . If an external amplifier is connected, add a 10 K Ω or 22 K Ω pull-up resistor . Low-power behavior, trigger mode, and volume can be adjusted through the config.txt file. 📘 Overview This document focuses on the BUSY pin behavior of the KT142C voice playback chip . The BUSY pin corresponds to pin 15 (PA12) . During playback, it outputs low level (0 V) ; when idle, it should output 3.3 V . However, after 5 seconds of inactivity , the chip automatically enters a 2 μA ultra-low-power mode — in this state, the BUSY pin becomes high-impedance . Consequently, the measured voltage drops to around 0.2 V , which is expected and not a fault. When connecting to an external power amplifier , you should add a 10 K Ω or 22 K Ω pull-up resistor to ensure s...