How to Use GLYPHSENSE-ICS43434-2CH: Examples, Pinouts, and Specs

The GLYPHSENSE-ICS43434-2CH (Manufacturer Part ID: GS-004) is a high-performance, low-noise microphone array integrated circuit designed by PCBCUPID. This component features two channels for stereo sound capture and advanced signal processing capabilities, making it ideal for applications requiring high-quality audio input.

• Voice recognition systems
• Smart home devices (e.g., smart speakers, voice assistants)
• Audio recording equipment
• Noise-canceling systems
• IoT devices with audio input capabilities

The following table outlines the key technical details of the GLYPHSENSE-ICS43434-2CH:

The GLYPHSENSE-ICS43434-2CH has a 10-pin LGA package. The pin configuration is as follows:

1. Power Supply: Connect the VDD pin to a stable power source (1.8V to 3.3V) and the GND pin to ground.
2. Clock Signal: Provide a clock signal (typically 1-3 MHz) to the CLK pin. This clock drives the PDM output.
3. Data Output: Connect the DATA pin to a microcontroller or DSP capable of processing PDM signals.
4. Channel Selection: Use the LRSEL pin to select the channel:
   • Logic HIGH: Right channel
   • Logic LOW: Left channel
5. Unused Pins: Leave the NC and TEST pins unconnected.

• Decoupling Capacitors: Place a 0.1 µF ceramic capacitor close to the VDD pin to reduce power supply noise.
• Clock Stability: Ensure the clock signal is stable and within the specified frequency range for optimal performance.
• PCB Layout: Minimize trace lengths for the CLK and DATA lines to reduce noise and signal degradation.
• Microphone Placement: For best results, position the microphone array in a location free from obstructions and away from noise sources.

The GLYPHSENSE-ICS43434-2CH can be interfaced with an Arduino UNO for audio processing. Below is an example of how to connect and use the component:

// Example code for interfacing GLYPHSENSE-ICS43434-2CH with Arduino UNO
// This code captures PDM data and processes it for basic audio analysis.

#include <PDM.h> // Include PDM library for handling PDM signals

// Define PDM pins
#define PDM_CLK_PIN 3
#define PDM_DATA_PIN 2

// Buffer to store PDM data
#define BUFFER_SIZE 256
int16_t pdmBuffer[BUFFER_SIZE];

// Callback function to handle incoming PDM data
void onPDMData() {
  // Read PDM data into the buffer
  int bytesAvailable = PDM.available();
  PDM.read(pdmBuffer, bytesAvailable);
  
  // Process the PDM data (e.g., convert to PCM or analyze)
  // Add your audio processing code here
}

void setup() {
  // Initialize serial communication for debugging
  Serial.begin(9600);
  while (!Serial);

  // Configure PDM library
  if (!PDM.begin(1, 16000)) { // Mono mode, 16 kHz sample rate
    Serial.println("Failed to initialize PDM!");
    while (1);
  }

  // Set the PDM callback function
  PDM.onReceive(onPDMData);

  Serial.println("PDM initialized successfully.");
}

void loop() {
  // Main loop does nothing; PDM data is handled in the callback
}

1. No Output from the Microphone

   • Cause: Incorrect power supply or clock signal.
   • Solution: Verify that the VDD pin is receiving the correct voltage and the CLK pin has a stable clock signal.

2. Distorted Audio

   • Cause: Noise on the power supply or improper PCB layout.
   • Solution: Add decoupling capacitors near the VDD pin and ensure proper grounding.

3. Microphone Not Responding to Channel Selection

   • Cause: Incorrect logic level on the LRSEL pin.
   • Solution: Check the voltage level on the LRSEL pin and ensure it matches the desired channel.

4. PDM Data Not Recognized by Microcontroller

   • Cause: Incorrect clock frequency or data pin connection.
   • Solution: Verify the clock frequency and ensure the DATA pin is connected to the correct microcontroller pin.

• Q: Can I use this component with a 5V power supply?
  A: No, the maximum supply voltage is 3.3V. Using a 5V supply may damage the component.

• Q: What is the maximum distance between the microphone and the microcontroller?
  A: Keep the distance as short as possible (preferably under 10 cm) to minimize signal degradation.

• Q: Can I use this component for mono audio applications?
  A: Yes, you can use only one channel by setting the LRSEL pin to the desired channel and leaving the other channel unconnected.

• Q: Is the component compatible with Raspberry Pi?
  A: Yes, the GLYPHSENSE-ICS43434-2CH can be interfaced with Raspberry Pi using its I2S interface for PDM data processing.