How to put the S08DZ96 to sleep mode!?

mehdializadeh — Sun, 05 Feb 2023 07:35:08 GMT

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.

Re: How to put the S08DZ96 to sleep mode!?

vicentegomez — Tue, 07 Feb 2023 16:29:03 GMT

I saw that you already solved

Regards

Vicente

8-bit MicrocontrollersのトピックHow to put the S08DZ96 to sleep mode!?

How to put the S08DZ96 to sleep mode!?

Re: How to put the S08DZ96 to sleep mode!?