Hi, im working in a project with the nRF5340-QKAA and I need VDD as output 1.8V, for this reasoin I supply the uC with 3.6V on VDDH like this image:
this works fine, I can read the 1.8V on VDD pins but the uC doesn't run the FW, it give me this error on VS Code when I try to flash it:
In other hand if I suply with 3.6V on all pins VDDH and VDD the uC runs and the FW works fine.
As FW I use the blink example of Nordic with this main:
#include <zephyr/kernel.h>
#include <zephyr/drivers/gpio.h>
#include <hal/nrf_gpio.h>
#define SLEEP_TIME_LEDS 1000
#define SLEEP_TIME_BUZZER 100
#define LED_RED NRF_GPIO_PIN_MAP(1, 3)
#define LED_GREEN NRF_GPIO_PIN_MAP(0, 8)
#define LED_BLUE NRF_GPIO_PIN_MAP(0, 9)
#define BUZZER NRF_GPIO_PIN_MAP(0, 7)
int main(void)
{
nrf_gpio_cfg_output(LED_RED); //Set pins as output
nrf_gpio_cfg_output(LED_GREEN);
nrf_gpio_cfg_output(LED_BLUE);
nrf_gpio_cfg_output(BUZZER);
while (1) {
nrf_gpio_pin_set(LED_RED);
k_msleep(SLEEP_TIME_LEDS);
nrf_gpio_pin_clear(LED_RED);
k_msleep(SLEEP_TIME_LEDS);
nrf_gpio_pin_set(LED_GREEN);
k_msleep(SLEEP_TIME_LEDS);
nrf_gpio_pin_clear(LED_GREEN);
k_msleep(SLEEP_TIME_LEDS);
nrf_gpio_pin_set(LED_BLUE);
k_msleep(SLEEP_TIME_LEDS);
nrf_gpio_pin_clear(LED_BLUE);
k_msleep(SLEEP_TIME_LEDS);
}
}
Any have idea why doesn work the uC whe I only suplly the VDDH pin with 3.6V?