TMAG5173-Q1: AFE CHECK Test Execution Time

Part Number: TMAG5173-Q1
Other Parts Discussed in Thread: TMAG5173

Tool/software:

Hello,

I am testing this sensor for AFE CHECK.

The execution time is 200us according to safety manual. But I get wrong result in that time. I need to wait at least 500us to complete conversion and get correct results.

I am trying to minimize the test execution time. Where am I doing wrong?

Config Registers

0xCCU, //DEVICE_CONFIG_1

0x00U, //DEVICE_CONFIG_2

0x40U, //SENSOR_CONFIG_1

0x00U, //SENSOR_CONFIG_2

AFE CHECK Code

uint16_t w_TMAG5173_checkAFE(tmag5173_t *ps_tmag)
{
  //6.3.7 Analog Front-End (AFE) Check (SM#7) 200 μsec
  int16_t i_adcp[3] = {0}, i_adcn[3] = {0};
  uint16_t w_status = 0U;

  //positive AFE
  v_TMAG5173_setMagChannelsTrig(ps_tmag, TMAG5173_MAG_CH_XYZPAFE);
  //DEVICE_DELAY_US(500U);
  while(w_status == 0U)
  {
    i_adcp[2] = i_TMAG5173_getResultZ(ps_tmag);
    w_status = ps_tmag->aw_values[2] & 0x01U;
  }

  if(w_status != 0U)
  {
    v_TMAG5173_getResultXY(ps_tmag);
    i_adcp[0] = i_TMAG5173_calcResult16(ps_tmag->aw_values[0], ps_tmag->aw_values[1]);
    i_adcp[1] = i_TMAG5173_calcResult16(ps_tmag->aw_values[2], ps_tmag->aw_values[3]);
  }

  //negative AFE
  v_TMAG5173_setMagChannelsTrig(ps_tmag, TMAG5173_MAG_CH_XYZNAFE);
  DEVICE_DELAY_US(500U);

  i_adcn[2] = i_TMAG5173_getResultZ(ps_tmag);
  w_status = ps_tmag->aw_values[2] & 0x01U;
  if(w_status != 0U)
  {
    v_TMAG5173_getResultXY(ps_tmag);
    i_adcn[0] = i_TMAG5173_calcResult16(ps_tmag->aw_values[0], ps_tmag->aw_values[1]);
    i_adcn[1] = i_TMAG5173_calcResult16(ps_tmag->aw_values[2], ps_tmag->aw_values[3]);
  }

  return w_TMAG5173_checkAFE_Limits(ps_tmag, i_adcp, i_adcn);
}