GPIO 24 voltage high low status

RE: GPIO 24 voltage high low status

mohanraj360 — Thu, 23 Aug 2018 12:42:34 GMT

where you seen that ouput ,i mean which terminater and how to see that

RE: GPIO 24 voltage high low status

hmolesworth — Mon, 02 Apr 2018 14:46:31 GMT

You are using standard drive if using the defaults, like this:

__STATIC_INLINE void nrf_gpio_cfg_output(uint32_t pin_number)
{
    nrf_gpio_cfg(
        pin_number,
        NRF_GPIO_PIN_DIR_OUTPUT,
        NRF_GPIO_PIN_INPUT_DISCONNECT,
        NRF_GPIO_PIN_NOPULL,
        NRF_GPIO_PIN_S0S1,
        NRF_GPIO_PIN_NOSENSE);
}

As a test, give it some wellie; if the voltage doesn't increase something is clamping it perhaps

    nrf_gpio_cfg(LED_GREEN_PIN,           // 24 eg. LED_GREEN
                 NRF_GPIO_PIN_DIR_OUTPUT,
                 NRF_GPIO_PIN_INPUT_DISCONNECT,
                 NRF_GPIO_PIN_NOPULL,
                 NRF_GPIO_PIN_H1S0,       // Require High Drive high level
                 NRF_GPIO_PIN_NOSENSE);

You could also add NRF_GPIO_PIN_PULLUP; if that increases the voltage you may have lost the FET to 2.8V on that pin. As an aside, I use that pin on the same package without issue. Also nrf_gpio_pin_out_read() does not of course read the status of the actual hardware pin, just the output register bit which is supposed to drive the pin.

RE: GPIO 24 voltage high low status

Newbie — Mon, 02 Apr 2018 12:27:23 GMT

Hi ,

I am waiting for the solution to this challenge.

Thanks,

RE: GPIO 24 voltage high low status

Newbie — Fri, 23 Mar 2018 10:53:11 GMT

Hi,

No, still this pin gives me 1.2 V .

Thanks,

RE: GPIO 24 voltage high low status

mon2 — Fri, 23 Mar 2018 10:52:13 GMT

If you output a low ("0"), does this port pin go low?

RE: GPIO 24 voltage high low status

mon2 — Fri, 23 Mar 2018 10:50:35 GMT

WLCSP packages are small. How good is your contract manufacturer? Can you inspect the WLCSP (xray) for any possible shorts?

RE: GPIO 24 voltage high low status

Newbie — Fri, 23 Mar 2018 10:04:38 GMT

Hi,

I am not using this pin for anything else. I am simply calling log init function and then I am calling gpio functions. Also in scope the output waveform is flat 1.2V.

Thanks,

RE: GPIO 24 voltage high low status

Håkon Alseth — Fri, 23 Mar 2018 06:54:48 GMT

Is there anything else using this particular pin in your program?

If for instance the PWM module is configured to use this pin, it will override your GPIO settings.

Could you scope this pin and see what the signal itself looks like?

Best regards,

Håkon

RE: GPIO 24 voltage high low status

Newbie — Fri, 23 Mar 2018 05:19:43 GMT

Note:

1. We are using NRf52832 package wlcsp.

2. All internal pull ups are disabled.

3. We are facing same challenge with other package (QFN48) on same pin i.e P0.26 (PIN 38).

We are attaching images for different test cases.

Thanks,

RE: GPIO 24 voltage high low status

Newbie — Fri, 23 Mar 2018 04:53:52 GMT

Hi,

We have not connected anything to this particular pin. We are facing this issue on every board.

Thanks,

RE: GPIO 24 voltage high low status

Håkon Alseth — Thu, 22 Mar 2018 13:36:54 GMT

Hi,

Is anything connected to the pin? If there's a high load on the pin, it will limit the voltage.

Does this occur on more than one board?

Best regards,.

Håkon

RE: GPIO 24 voltage high low status

Newbie — Thu, 22 Mar 2018 13:01:49 GMT

Yeah we am sure we are checking correct pin. We are using WLCSP Pakagae. But we are sure that we are checking correct pin.

Thanks,

RE: GPIO 24 voltage high low status

Håkon Alseth — Thu, 22 Mar 2018 12:45:41 GMT

Hi,

GPIO P0.26 is pin 38 on the mechanical package (QFN48) of the nRF52832. Are you sure you're checking the correct pin?

Best regards,

Håkon