In the application of the medical device industry, traditional medical devices are often displayed on a screen to visually convey relevant information. In order to make it more convenient for medical staff or patients to use the equipment, many manufacturers have chosen to add a voice prompt function on the equipment, so that the nursing equipment has the advantages of visual and auditory communication. Medical device voice prompt chip selection? Voice prompts for medical devices need to communicate information clearly and accurately, so developers need to choose a chip that supports high-quality audio output, medical devices usually need to run for a long time, so choosing a chip with low power consumption can extend battery life. Different medical devices need to customize different voice content, in order to make it easier for manufacturers to replace the voice content, programmable chips are usually selected to meet the needs of customized development. NV400F is a Flash voice chip, support volume multi-level control, PWM audio output mode, with low power standby, soft shutdown, wide voltage work, multiple control methods, support for UART update audio, mainly suitable for applications in the need to frequently modify the voice (support their own burning), voice length is less than or equal to 400 seconds of application scenarios.

1. Power Management: The NV400F voice chip supports a wide range of power supplies, from 2.0V to 5.5V, typically 3.7V, suitable for a variety of power configurations. At the same time, it offers a low-power mode with a current of only 2uA in the soft shutdown state, effectively extending battery life.

2. Audio output: NV400F has 12-bit PWM pure audio output function, which can directly drive 8Ω/0.5W horn and buzzer. This means that the NV400F voice chip can achieve high-quality audio output, making voice playback more clear and vivid.

3. High audio sampling rate: NV400F voice chip supports up to 16K audio sampling rate, providing high-fidelity audio input and output. In addition, it also supports a PCM data transfer rate of up to 32K, which can meet the needs of higher quality voice applications. NV400F voice chip in medical equipment application value:

1. Add voice alarm function: Medical equipment can convey detailed alarm information to medical personnel by voice, providing more background information and specific instructions. This helps health care workers quickly understand the source of the alarm, the level of urgency, and what should be done accordingly.

2, enhance the ease of use of equipment: Voice can make medical equipment easier to use and operate, especially for those who are unfamiliar with the operation of equipment or have visual impairments. With voice guidance and reminders, the operation is more intuitive and convenient.

3, reduce human operation errors: in emergency situations, medical personnel may face a certain amount of pressure and tension, prone to negligence or misoperation. Voice guidance can help reduce the error caused by human operation, and reduce the risk of operation through voice instructions and reminders. NV400F voice chip control mode: The NV400F voice chip can be configured in the following control modes: UART standard serial port control mode, first-line serial port control mode, second-line serial port control mode, negative edge pulse control mode, and key control mode. Control mode The default mode is serial port control (modifiable). You can power it on using the UART or offline tool. Users can select only one control mode at a time. For example, if UART mode is selected, the MCU can only control the NV400F voice chip through UART, and other control methods are invalid. (Communication pin string 220R-1K resistance) If 5S no-action automatic low power, enter low power, wake up again, the first low level of the code should be extended by 1ms on the basis of the shortest time, serial communication needs to send an invalid code first, wait for 1ms and then send the normal code again, such as after opening the soft shutdown mode, any low level can be woken up for 1ms. After waking up, the chip automatically resets and needs to wait for 200-300ms to start receiving normally.