OSCILLATORS HAL

group nrf_oscillators_hal

Hardware access layer for managing the OSCILLATORS peripheral.

Enums

enum nrf_oscillators_lfxo_cap_t

Capacitors configuration for LFXO.

Values:

enumerator NRF_OSCILLATORS_LFXO_CAP_EXTERNAL

Use external capacitors.

enumerator NRF_OSCILLATORS_LFXO_CAP_6PF

Use 6 pF internal capacitors.

enumerator NRF_OSCILLATORS_LFXO_CAP_7PF

Use 7 pF internal capacitors.

enumerator NRF_OSCILLATORS_LFXO_CAP_9PF

Use 9 pF internal capacitors.

enumerator NRF_OSCILLATORS_LFXO_CAP_11PF

Use 11 pF internal capacitors.

Functions

NRF_STATIC_INLINE void nrf_oscillators_lfxo_bypass_set(NRF_OSCILLATORS_Type *p_reg, bool enable)

Function for enabling or disabling the bypass of LFXO with external clock source.

Parameters:

• p_reg – [in] Pointer to the structure of registers of the peripheral.

• enable – [in] True if bypass is to be enabled (use with rail-to-rail external source). False if bypass is to be disabled (use with xtal or low-swing external source).

NRF_STATIC_INLINE void nrf_oscillators_lfxo_cap_set(NRF_OSCILLATORS_Type *p_reg, nrf_oscillators_lfxo_cap_t cap)

Function for configuring the internal capacitors of LFXO.

Parameters:

• p_reg – [in] Pointer to the structure of registers of the peripheral.

• cap – [in] Capacitors configuration.

NRF_STATIC_INLINE void nrf_oscillators_hfxo_cap_set(NRF_OSCILLATORS_Type *p_reg, bool enable, uint32_t cap_value)

Function for configuring the internal capacitors of HXFO.

The capacitance of internal capacitors ranges from 7 pF to 20 pF in 0.5 pF steps. To calculate the correct cap_value, use the following equation: CAPVALUE = (1+FICR->XOSC32MTRIM.SLOPE/16) * (CAPACITANCE*2-14) + FICR->XOSC32MTRIM.OFFSET

Parameters:

• p_reg – [in] Pointer to the structure of registers of the peripheral.

• enable – [in] True if internal capacitors are to be enabled, false otherwise.

• cap_value – [in] Value representing capacitance, calculated using provided equation. Ignored when internal capacitors are disabled.