CC2340R5: Need to tristate all the unused pins in new custom board with CC2340 IC

ilanchezhian Thingalkodi

Part Number: CC2340R5

Hi,

I do not know when I put the same example code in our hardware, we see that current drawn by our board is 1.3mA but the evaluation board consumes100uA.

Why is that I do not know. I am suspecting that any leakage current in the unused pins in our custom board. Could you please let us know how to put the unused pin to tristate.

With Regards

Ilan

over 1 year ago

0 Jake Pulliam over 1 year ago

TI__Expert 6520 points

Hi Ilan,

You can use the function GPIO_setConfigAndMux() (https://dev.ti.com/tirex/explore/content/simplelink_lowpower_f3_sdk_7_40_00_64/docs/drivers/doxygen/html/_g_p_i_o_8h.html#a53cc86d668c93f510dc3de7332410ebd)

The reset state for the GPIO should be disabled (IOC and GPIO registers reset to all 0). So make sure none of your pins are being configured elsewhere in your code. You can verify the pin settings by checking the IOC and GPIO register settings while debugging. Are these outputs tied to ground then?

BR,

Jake

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CC2340R5: Need to tristate all the unused pins in new custom board with CC2340 IC