TMS320F280048C-Q1: TMS320F280048C-Q1:

Ed Wong

I'm trying to set the F28004x in HALT mode for lowest power consumption, here is following code for enter HALT, but it cannot acthived the current as data sheet:

EALLOW;
ClkCfgRegs.CLKSRCCTL1.bit.OSCCLKSRCSEL = 2; // use INTOSC1
ClkCfgRegs.XTALCR.bit.OSCOFF = 1; //Turn off XTALOSC
ClkCfgRegs.SYSPLLCTL1.bit.PLLCLKEN = 0;
ClkCfgRegs.CLKSRCCTL1.bit.WDHALTI = 0 ;
EDIS;

SysCtl_enterHaltMode();

Do I missed any command?

I don't configure the pin for wakeup and use external watchdog to reset the power to micro, is it OK to do this way?

Thanks

Ed Wong

over 4 years ago

+1 Cody Watkins over 4 years ago

TI__Mastermind 42195 points

Ed,

Sorry for the delay in responses.

What current are you seeing?
How are you measuring the currents?
Have you turned off the Flash as well when using HALT mode?
1. Flash_powerDown(FLASH0CTRL_BASE);
Finally have you turned off the PLL when going into HALT mode?
1. ClkCfgRegs.SYSPLLCTL1.bit.PLLEN = 0; // power down PLL

Please let me know anything else we can do to help with your issue.

Regards,
Cody

0 Ed Wong over 4 years ago in reply to Cody Watkins

Prodigy 25 points

Thanks Cody

I measured about 14mA, it is approximately number because I can only measure with input of buck-boost switcher only which power the micro.

Here is sequence for going to HALT mode:

SysCtl_enterHaltMode();
EALLOW;
// CpuSysRegs.LPMCR.bit.LPM = 0x2;
// ClkCfgRegs.CLKSRCCTL1.bit.WDHALTI = 1 ;
Flash_powerDown(FLASH0CTRL_BASE); //Turnoff Flash
ClkCfgRegs.SYSPLLCTL1.bit.PLLEN = 0; // power down PLL
EDIS;

I don't see any current change when I shutdown the Flash and PLL.

Thanks

0 Ed Wong over 4 years ago in reply to Ed Wong

Prodigy 25 points

Hi Cody,

Just make measurement on micro, it is 5mA.

I still don't see any different with turnoff Flash or not.

Thanks

0 Ozino Odharo over 4 years ago in reply to Ed Wong

TI__Mastermind 18003 points

Ed,

Please see the first response in this E2E post and follow the steps detailed in the document.

https://e2e.ti.com/support/microcontrollers/c2000/f/c2000-microcontrollers-forum/807243/tms320f280049-achieving-lowest-power-consumption-of-f28004x

Regards,

Ozino

C2000™︎ microcontrollers

C2000 microcontrollers forum

TMS320F280048C-Q1: TMS320F280048C-Q1: