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Supply power by pins P1_0 and P1_1?

Armen Dzhagaryan
Prodigy 150 points
Other Parts Discussed in Thread: CC2540

I need to supply power to nordic chip which I am trying to connect with OLP425 (based on CC2540). However, when I connected it to P1_0 or P1_1, which according to datasheet say they can supply 20mA, I am getting nothing.

What do I need to do to enable those?

  • 0
    Guru 18605 points

    Hi Armen,

    there are a few lack of details in your problem description. I see in this page...

    http://support.connectblue.com/display/PRODBTSPA/cB-OLP425+cB-OLS425+cB-OLS426+Electrical+Mechanical+Data+Sheet

    P1_0, P1_1 are pins of the CC2540 which are mapped to J6.2 (jumper 6, pin2) and J6.9. These are GPIO pins. Pins which are commonly used to attach a pressure sensor, a LED, a button, whatever, they are not intended for what you want to do.

    J8.1 and J8.2 are GND and VCC, perhaps you are searching for these ones :)

  • 0
    TI__Guru** 106705 points

    Hi Armen,

    You can use P1.0 and P1.1 to power other units as long as the current consumption is 20mA or lower. You must of course configure the CC2540 pins as logic-1 outputs. Have a look in the user's guide on how to do this.

    Maybe you can explain what you are trying to do here? You want the OLP425 to communicate with a nordic chip, but at the same time you want to power the nordic chip from CC2540?

    /Fredrik

  • 0 in reply to Fredrik K
    Prodigy 150 points

    Hi.

    Yes, this is correct.

    I want to power nordic nRF24L01+ transceiver module that is connected to OLP425. And I want to use that nordic to communicate with another nordic transceiver on another device.