I2C on STM32G474QE don't works

[OGhis]

The I2C4 on the STM32G474QE (128 pins) don't works .

There is a delay between the clock signals on the I2C bus

The i2C bus was configured for 400Khz.

Has anyone an ide why we have this delays between the clock?

When we execute the same code on a nucleo-G474RE board, the clock signals are OK without any delay.

Is this a bug in the MCU?

Hereby the code i had added in the main()

  /* USER CODE BEGIN WHILE */
  uint8_t buffer[2] = { 0x02, 0x03 };
 
  while (1) {
 
    HAL_I2C_Mem_Write(&hi2c4,
                      0xA0,
                      0x55,
                      1,
                      &buffer[0],
                      2,
                      5);
    HAL_Delay(100);
 
    /* USER CODE END WHILE */
 
    /* USER CODE BEGIN 3 */
  }

[Igor Cesko]

Hi OGhis (Community Member),

The I2C signal connection on LQFP64 and LQFP128 packages are the same (PC7, PC6) - so the behavior should be the same (chip is the same). Did you load the same firmware (same binary code) into LQFP64 (Nucleo board) and then it worked OK?

Regards

Igor