CC2640R2F: with External Flash High Standby Current.

Markel Robregado

Part Number: CC2640R2F
Other Parts Discussed in Thread: CC2640

Hi,

Our initial CC2640R2F based product does not have external flash, when it powers up, we set it to not advertise and we are able to get Standby Current of 1.4 uA to 1.6 uA.

We added external flash to CC2640R2F based product to support Off-Chip OAD. At power up and advertise set to off, I am getting Standby Current of 3 mA. I add this code below at initialization and I am still getting 3 mA standby current.

    ExtFlash_open();
    ExtFlash_close();
    extFlashDeselect();

What do i need to do to get a Standby Current of 1.4 uA to 1.6 uA from a CC2640R2fF product that has external flash.

- kel

over 9 years ago

0 Fredrik K over 9 years ago

TI__Guru** 106705 points

Hi Kel,

what is consuming the 3 mA? The flash or the CC2640? Are you sure the flash device is put properly in Standby?

Cheers,
Fredrik

0 Markel Robregado over 9 years ago in reply to Fredrik K

Guru 86865 points

Hi Fredrik,

Isn't it calling these 2 code lines below enough to close the SPI lines to the External Flash? I just followed the Measuring BLE Consumption Document.

ExtFlash_open();
ExtFlash_close();

- kel

0 Fredrik K over 9 years ago in reply to Markel Robregado

TI__Guru** 106705 points

Are you using the same flash part?

0 Markel Robregado over 9 years ago in reply to Fredrik K

Guru 86865 points

Hi Fredrik,

I am using the same flash part used in CC2640R2 Launchpad. Anyway, I forgot to set the SPI pins at BoardGpioInitTable[]. I will measure the standby current again next week. Maybe the standby current will be lower after I set the SPI pins at BoardGpioInitTable[].

- kel

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CC2640R2F: with External Flash High Standby Current.