RE: High power consumption caused by I2C

Hannibalhz — Fri, 31 Dec 2021 08:34:13 GMT

Dear Vidar

Thank your for your support，your suggestions is veryuseful.

Happly new year and best regard.

RE: High power consumption caused by I2C

Vidar Berg — Fri, 10 Dec 2021 14:04:26 GMT

Hello,

150-200 uA can be an indication of a floating input. Assume you don't have external pull-ups? Either way, please try the following perform the following sequence when disabling TWIM:

1. nrf_drv_twi_uninit(); // unitialize the driver and disable the peripheral

2. Configure the I2C pins back to their reset configuration (input, disconnect) by calling nrf_gpio_cfg_default(SCL_PIN); and nrf_gpio_cfg_default(SDA_PIN);

3. Perform the workaround for [89] GPIOTE: Static 400 µA current while using GPIOTE

*(volatile uint32_t *)0x40003FFC = 0;
*(volatile uint32_t *)0x40003FFC;
*(volatile uint32_t *)0x40003FFC = 1;

Hope this helps!

Best regards,

Vidar