topic Re: Sleep Mode for S9S12GA240 in S12 / MagniV Microcontrollers

Sleep Mode for S9S12GA240

punithb — Fri, 29 Jul 2016 07:17:12 GMT

How to put S9S12GA240 micro controller in sleep mode?. What is cpu current taking in sleep and run mode?

Re: Sleep Mode for S9S12GA240

iggi — Fri, 29 Jul 2016 10:03:16 GMT

Hi,

please see the following document

S12G Examples Pack

Use G240-API+STOP-CW51 particular example.

Also some other SW examples demonstrating Low Power Modes you can find here:

AN4455, MC9S12G128/A240 Demonstration Lab Training - Application Notes

AN4455SW

Regarding the MCU supply currents, please see Appendix A.3 in S12G datasheet:

MC9S12GRMV1, MC9S12G Family Reference Manual and Data Sheet

Regards,

iggi

Re: Sleep Mode for S9S12GA240

punithb — Fri, 29 Jul 2016 12:55:39 GMT

Hi iggi,

Thanks for your support. Here how i enable the sleep mode.

CPMUCLKS_PSTP = 1; /* Set PSTP bit to enable Pseudo Stop

Mode */

asm ANDCC #0x7F; /* Clear S-bit in the CCR to enable

STOP instruction */

asm STOP; /* Enter Pseudo Stop mode */

But how to evoke the controller from sleep mode because i am not able to do

any task after i entered sleep mode. I have gpio interrupt also in my code.

Re: Sleep Mode for S9S12GA240

punithb — Fri, 29 Jul 2016 13:37:18 GMT

Hi iggi,

Thanks for your support. Here how i enable the sleep mode.

CPMUCLKS_PSTP = 1; /* Set PSTP bit to enable Pseudo Stop Mode */

asm ANDCC #0x7F; /* Clear S-bit in the CCR to enable STOP instruction */

asm STOP; /* Enter Pseudo Stop mode */

But how to evoke the controller from sleep mode because i am not able to do any task after i entered sleep mode. I have gpio interrupt also in my code.

I am writing that 3 instuction in while(1) loop then only current reduced but device not able wake up from interrupt.

ex:

while(1)

{

if(interrupt_flag == true)

{

// do some task like toggle led

}

else

{

CPMUCLKS_PSTP = 1; /* Set PSTP bit to enable Pseudo Stop Mode */

asm ANDCC #0x7F; /* Clear S-bit in the CCR to enable STOP instruction */

asm STOP; /* Enter Pseudo Stop mode */

}

But interrupt_flag not setting.

Re: Sleep Mode for S9S12GA240

punithb — Sat, 30 Jul 2016 05:54:20 GMT

Hi Iggi,

Could you please support me to reduce the current to max ?.