Class D Audio Amplifier IC Forum Discussions

[Happy]

Hello! , I used arduino to try to set the value of Select Power Mode Profile setting, using I2c.write(0x20, 0x00, 0x01); Successful, but all the settings are restored after the power is cut off, can I not permanently write the configuration settings of the MA12070?

1.Both AD0 and AD1 are grounded

2.code

#include <I2C.h>

byte red = 0;

const byte LED = 13;    // LED pin number

const byte BUTTON = 2;  // BUTTON pin number

volatile int state = LOW;

int arr[7];

int i = 0;

byte *b;

void setup() {

  // put your setup code here, to run once:

  pinMode(LED, OUTPUT);        // so we can update the LED

  digitalWrite(BUTTON, HIGH);  // internal pull-up resistor

  I2c.begin();

  I2c.write(0x20, 0x00, 0x01);  //

  //  I2c.write(0x20, 0x27, 0x03);  //

  // I2c.end();

  // I2c.begin();

  digitalWrite(LED, 0);

  // I2c.timeOut(500);

  // I2c.pullup(true);

  Serial.begin(9600);

  Serial.println("open");

  // I2c.setSpeed(true);

  // I2c.end();

}

void loop() {

  // put your main code here, to run repeatedly:

  //

  red = I2c.read(0x20, 0x7C, 0x00);

  // I2c.timeOut(5000);

  byte v=I2c.receive();

  Serial.print(v,HEX); 

    Serial.print('=');

 Serial.print(v,BIN); 

  Serial.print(' ');

  if (i >= 15) {

    Serial.println();

    i = 0;

  }

  i++;

   delay(500); 

}

[LinGuohui]

Hi @Happy 

Registers are generally volatile,  Therefore, every time power on, need to rewrite the register.

[Happy · Accepted solution]

你说的内容我也知道，对我来说不是答案。

[LinGuohui]

寄存器的值，每次上电都会恢复默认值，必须重新写入，没有其他办法。