s32k358+MC33774 auto pause issue

BillWen — Thu, 12 Mar 2026 08:39:08 GMT

Hi :

My platform is S32k358 with MC33774

Project : NXP HVBMS_RD_800V_Bring_up_Example_1_0_2

In the project cmu code, as following function:

HVBMS_Errors Cmu_StartMeas(Bcc_774a_MsrChainType MeasChain, Bcc_774a_MsrMeasurementType MeasType)

{

Std_ReturnType Status = E_OK;

Bcc_774a_MsrBalPauseType BalPause;

Bcc_774a_MsrSetModeParamsType SetModeParams;

BalPause.BalancingPauseTimer = 0;

BalPause.BalancingAutopauseEn = FALSE;

SetModeParams.PauseBalancing = FALSE;

SetModeParams.OpenLoadNum = MC33774_PRMM_APP_CTRL_VCOLNUM_DISABLED_ENUM_VAL;

uint8 BCC_Device_Addr = 1;

/* Start primary measurements */

if(isCmuChainBroken == true)

{

Status |= Bcc_774a_SetMADD(BCC_CHAIN_ADDR,BCC_BROADCAST,true);

Status |= Bcc_774a_MSR_StartMeasurements(BCC_CHAIN_ADDR, BCC_BROADCAST, MeasChain, BalPause, &BmsTDCfg_Tpl3);

Status |= Bcc_774a_SetMADD(BCC_CHAIN_ADDR,BCC_BROADCAST,false);

Status |= Bcc_774a_MSR_StartMeasurements(BCC_CHAIN_ADDR, BCC_BROADCAST, MeasChain, BalPause, &BmsTDCfg_Tpl3);

}

else

{

Status |= Bcc_774a_MSR_StartMeasurements(BCC_CHAIN_ADDR, BCC_BROADCAST, MeasChain, BalPause, &BmsTDCfg_Tpl3);

}

if(MeasType == BCC_774A_MSR_TYPE_APPLICATION)

{

if(isCmuChainBroken == true)

{

Status |= Bcc_774a_SetMADD(BCC_CHAIN_ADDR,BCC_BROADCAST,true);

Status |= Bcc_774a_MSR_SetMode(BCC_CHAIN_ADDR, BCC_BROADCAST, MeasType, &SetModeParams, &BmsTDCfg_Tpl3);

/* Wait 4ms for measurements to be completed */

Status |= Bms_TD_InsertPhyEvent(&BmsTDCfg_Tpl3, PHY_TIMER, 4000);

Status |= Bcc_774a_MSR_SetMode(BCC_CHAIN_ADDR, BCC_BROADCAST, MeasType, &SetModeParams, &BmsTDCfg_Tpl3);

Status |= Bms_TD_InsertPhyEvent(&BmsTDCfg_Tpl3, PHY_TIMER, 300);

/* Insert for the 300 us delay */

Status |= Bcc_774a_COM_InsertNop(BCC_CHAIN_ADDR, BCC_BROADCAST, &BmsTDCfg_Tpl3);

Status |= Bcc_774a_SetMADD(BCC_CHAIN_ADDR,BCC_BROADCAST,false);

Status |= Bcc_774a_MSR_SetMode(BCC_CHAIN_ADDR, BCC_BROADCAST, MeasType, &SetModeParams, &BmsTDCfg_Tpl3);

/* Wait 4ms for measurements to be completed */

Status |= Bms_TD_InsertPhyEvent(&BmsTDCfg_Tpl3, PHY_TIMER, 4000);

Status |= Bcc_774a_MSR_SetMode(BCC_CHAIN_ADDR, BCC_BROADCAST, MeasType, &SetModeParams, &BmsTDCfg_Tpl3);

Status |= Bms_TD_InsertPhyEvent(&BmsTDCfg_Tpl3, PHY_TIMER, 300);

/* Insert for the 300 us delay*/

Status |= Bcc_774a_COM_InsertNop(BCC_CHAIN_ADDR, BCC_BROADCAST, &BmsTDCfg_Tpl3);

}

else

{

Status |= Bcc_774a_MSR_SetMode(BCC_CHAIN_ADDR, BCC_BROADCAST, MeasType, &SetModeParams, &BmsTDCfg_Tpl3);

/* Wait 4ms for measurements to be completed */

Status |= Bms_TD_InsertPhyEvent(&BmsTDCfg_Tpl3, PHY_TIMER, 4000);

Status |= Bcc_774a_MSR_SetMode(BCC_CHAIN_ADDR, BCC_BROADCAST, MeasType, &SetModeParams, &BmsTDCfg_Tpl3);

Status |= Bms_TD_InsertPhyEvent(&BmsTDCfg_Tpl3, PHY_TIMER, 300);

/* Insert for the 300 us delay */

Status |= Bcc_774a_COM_InsertNop(BCC_CHAIN_ADDR, BCC_BROADCAST, &BmsTDCfg_Tpl3);

}

else if(MeasType == BCC_774A_MSR_TYPE_SYNCHRONOUS)

{

// Reserved for further development

}

else

{

// Avoid MISRA errors

}

/* Call Bcc_774a_Send */

Status |= Bms_TD_Send(&BmsTDCfg_Tpl3, &PhyError);

if(Status != E_OK)

{

return ERROR_CMU_START_MEASUREMENT_TD_FILL;

}

/* Wait until PHY processes the request */

Td_Wait(&BmsTDCfg_Tpl3);

if(PhyError != PHY_NO_ERROR)

{

return ERROR_CMU_START_MEASUREMENT_TD_SEND;

}

/* Clear TD after completion */

Status = Bms_TD_Clear(&BmsTDCfg_Tpl3);

return NO_ERROR;

}

I want to open auto pause function, but after I open it, when start CB and I still get wrong cell voltage. Is there any idea about this?

Thanks

BR, BillWen

Re: s32k358+MC33774 auto pause issue

TomasVaverka — Fri, 13 Mar 2026 11:15:41 GMT

Hi,

I believe this has already been discussed with your colleague Mark and solved in this thread: https://community.nxp.com/t5/Power-Management/MC33774A-Pause-balancing-feature/td-p/2074950

BRs, Tomas

Re: s32k358+MC33774 auto pause issue

BillWen — Mon, 16 Mar 2026 04:07:33 GMT

HI Tomas:
Of course I know, I also discuss with him.
But I can't fix this issue by his way, that why I want to know is there any idea or suggestion. I also want to know is this function work on this "NXP HVBMS_RD_800V_Bring_up_Example_1_0_2" project?
Because we use different mcu and different measure flow by 33774A.

Thanks
BR, BillWen

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s32k358+MC33774 auto pause issue

Re: s32k358+MC33774 auto pause issue

Re: s32k358+MC33774 auto pause issue