CC3200 PIN29/30 for ANTSEL1 and ANTSEL2 that Can be use for GPO?

EthanChen

Other Parts Discussed in Thread: CC3200

Hi all,

Can CC3200 PIN29/30 be use for GPO purpose?

In datasheet have below description

8) This pin is reserved for WLAN antenna selection, controlling an external RF switch that multiplexes the RF pin of the CC3200 device between two antennas. These pins should not be
used for other functionalities in general.

But from SDK example for "antenna_selection" it just GPIO write for HI/LO

static void AntennaSelect(unsigned char ucAntNum)
{
    if(ucAntNum == 1)
    {
         MAP_GPIOPinWrite(GPIOA3_BASE, 0xC, 0x8);
    }
    else if(ucAntNum == 2)
    {
        MAP_GPIOPinWrite(GPIOA3_BASE, 0xC, 0x4);
    }

return;
}

If so, It it seems that can for GPO?

Can you help confirm it?

Ethan Chen

over 10 years ago

0 Prajay Madhavan over 10 years ago

TI__Genius 11120 points

Ethan Chen

These GPIOs are special in the sense they cannot drive any DC load. Hence we have used them to drive the switch control input which draw very less DC currents.

Hence these are not recommended to be used as a regular GPIO which is used to drive an LED for example.

0 EthanChen over 10 years ago in reply to Prajay Madhavan

Intellectual 550 points

Hi Prajay Madhavan,
Have you more detail about how much driver current with those PIN out?
We just think to driver G-Sensor like ADXL362 for SPI CS or clock signal because the tight GPIO with CC3200 for our application.

Thank you.
Ethan Chen

0 Prajay Madhavan over 10 years ago in reply to EthanChen

TI__Genius 11120 points

Ethan Chen

The use of this pin is restricted as they are internally multiplexed with our RF/Analog test pins. The toggling on this pin can cause adverse impact to the RF performance and hence is not recommended.

It can be used for only specific application which is in sync with RF (like the switch control). We would not recommend to use this for any other purpose.

0 Praveen Kumar N over 10 years ago in reply to Prajay Madhavan

TI__Expert 6700 points

Ethan Chen,

If all your queries are answered please press verify answer button to close this thread.

Thanks and Regards,
Praveen

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CC3200 PIN29/30 for ANTSEL1 and ANTSEL2 that Can be use for GPO?