How to put the S08DZ96 to sleep mode!?

[mehdializadeh]

Hi,
I am using mc9s08dz96.
This is the first time I want to put the MCU to sleep. I want to use STOP3 mode. So far I have found that I need to set some registers before issuing the STOP command. I have made these settings according to the datasheet.

void _EntryPoint(void)
{
  /* ### MC9S08DZ128_64 "Cpu" init code ... */
  /*  PE initialization code after reset */
  /* Common initialization of the write once registers */
  /* SOPT1: COPT=0,STOPE=1,SCI2PS=0,IIC1PS=0,??=0,??=0,??=0 */
  setReg8(SOPT1, 0x20U);                
  /* SOPT2: COPCLKS=0,COPW=0,??=0,ADHTS=0,??=0,MCSEL=0 */
  setReg8(SOPT2, 0x00U);                
  /* SPMSC1: LVWF=0,LVWACK=0,LVWIE=0,LVDRE=1,LVDSE=1,LVDE=1,??=0,BGBE=0 */
  setReg8(SPMSC1, 0x1CU);               
  /* SPMSC2: ??=0,??=0,LVDV=0,LVWV=0,PPDF=0,PPDACK=0,??=0,PPDC=0 */
  setReg8(SPMSC2, 0x00U);               
  /*  System clock initialization */
  /*lint -save  -e923 Disable MISRA rule (11.3) checking. */
  if (*(uint8_t*)0xFFAFU != 0xFFU) {   /* Test if the device trim value is stored on the specified address */
    MCGTRM = *(uint8_t*)0xFFAFU;       /* Initialize MCGTRM register from a non volatile memory */
    MCGSC = *(uint8_t*)0xFFAEU;        /* Initialize MCGSC register from a non volatile memory */
  }
  /*lint -restore Enable MISRA rule (11.3) checking. */
  /* MCGC2: BDIV=0,RANGE=1,HGO=0,LP=0,EREFS=0,ERCLKEN=1,EREFSTEN=1 */
  setReg8(MCGC2, 0x23U);               /* Set MCGC2 register */ 
  /* MCGC3: DIV32=1 */
  setReg8Bits(MCGC3, 0x10U);            
  /* MCGC1: CLKS=2,RDIV=3,IREFS=0,IRCLKEN=1,IREFSTEN=1 */
  setReg8(MCGC1, 0x9BU);               /* Set MCGC1 register */ 
  /* MCGC3: LOLIE=0,PLLS=0,CME=0,DIV32=1,VDIV=4 */
  setReg8(MCGC3, 0x14U);               /* Set MCGC3 register */ 
  /* MCGT: ??=0,??=0,DMX32=0,??=0,??=0,??=0,??=0,DRST_DRS=0 */
  setReg8(MCGT, 0x00U);                /* Set MCGT register */ 
  while(MCGSC_IREFST != 0U) {          /* Wait until external reference is selected */
  }
  while((MCGSC & 0x0CU) != 0x08U) {    /* Wait until external clock is selected as a bus clock reference */
  }
  /* MCGC2: BDIV=0,RANGE=1,HGO=0,LP=1,EREFS=0,ERCLKEN=1,EREFSTEN=1 */
  setReg8(MCGC2, 0x2BU);               /* Set MCGC2 register */ 
  /* MCGC1: CLKS=2,RDIV=2,IREFS=0,IRCLKEN=1,IREFSTEN=1 */
  setReg8(MCGC1, 0x93U);               /* Set MCGC1 register */ 
  /* MCGC3: DIV32=0 */
  clrReg8Bits(MCGC3, 0x10U);            
  /* MCGC3: LOLIE=0,PLLS=1,CME=0,DIV32=0,VDIV=4 */
  setReg8(MCGC3, 0x44U);               /* Set MCGC3 register */ 
  while(MCGSC_PLLST == 0U) {           /* Wait until PLL is selected */
  }
  /* MCGC2: LP=0 */
  clrReg8Bits(MCGC2, 0x08U);            
  while(MCGSC_LOCK == 0U) {            /* Wait until PLL is locked */
  }
  /* MCGC1: CLKS=0,RDIV=2,IREFS=0,IRCLKEN=1,IREFSTEN=1 */
  setReg8(MCGC1, 0x13U);               /* Set MCGC1 register */ 
  while((MCGSC & 0x0CU) != 0x0CU) {    /* Wait until PLL clock is selected as a bus clock reference */
  }
  

  /*** End of PE initialization code after reset ***/
  /*lint -save  -e950 Disable MISRA rule (1.1) checking. */
  __asm   jmp _Startup ;               /* Jump to C startup code */
  /*lint -restore Enable MISRA rule (1.1) checking. */
}

Next, I put the "__asm stop;" command in the main(),

void main(void)
{
  PE_low_level_init();
  while(1){
  __asm stop;
  }
}

But I don't see any change that the power consumption has decreased. In fact, I expect the device's consumption to reach microamps after the stop command, instead of the usual 30mA. Is " __asm stop; " command correct? Shouldn't I define it before this command?
Thank you for your help.

[vicentegomez]

I saw that you already solved 

Regards

Vicente