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/Zephyr-latest/dts/bindings/timer/
Dambiq,stimer.yaml26 3 - XTAL_DIV1 : 32768Hz from the crystal oscillator.
27 4 - XTAL_DIV2 : 16384Hz from the crystal oscillator.
28 5 - XTAL_DIV32 : 1024Hz from the crystal oscillator.
36 3 - XTAL_32KHZ : 32768Hz from the crystal oscillator.
37 4 - XTAL_16KHZ : 16384Hz from the crystal oscillator.
38 5 - XTAL_1KHZ : 1024Hz from the crystal oscillator.
/Zephyr-latest/soc/atmel/sam/common/
DKconfig11 bool "Use external crystal oscillator for slow clock"
13 Says y if you want to use external 32 kHz crystal oscillator to drive
15 crystal needs to stabilize after power-up.
21 bool "Use external crystal oscillator for main clock"
27 Says y if you want to use external crystal oscillator to drive the
29 crystal needs to stabilize after power-up.
31 The crystal used here can be from 3 to 20 MHz.
86 using external crystal oscillator for main clock.
Dsoc_pmc.h246 * @brief Enable the external crystal oscillator.
248 * @param xtal_startup_time crystal start-up time, in number of slow clocks.
265 * @brief Bypass the external crystal oscillator.
274 /* Enable Crystal oscillator but DO NOT switch now. Keep MOSCSEL to 0 */ in soc_pmc_osc_bypass_main_xtal()
280 * @brief Disable the external crystal oscillator.
292 * @brief Check if the external crystal oscillator is bypassed.
294 * @return true if external crystal oscillator is bypassed, false otherwise
302 * @brief Check if the external crystal oscillator is ready.
304 * @return true if external crystal oscillator is ready, false otherwise
312 * @brief Switch main clock source selection to external crystal oscillator.
[all …]
/Zephyr-latest/soc/atmel/sam0/common/
DKconfig.samd5x7 bool "The external 32 kHz crystal oscillator"
9 Say y to enable the external 32 kHZ crystal oscillator at
15 hex "Startup time external 32 kHz crystal oscillator"
19 Selects the startup time for the external 32 kHz crystal oscillator.
DKconfig.samd2x31 bool "External 32.768 kHz clock is a crystal oscillator"
35 Enable the crystal oscillator (if disabled, expect a clock signal on
45 bool "External 0.4..32 MHz clock is a crystal oscillator"
49 Enable the crystal oscillator (if disabled, expect a clock signal on
/Zephyr-latest/samples/boards/espressif/xt_wdt/
DREADME.rst4 Trigger watchdog interrupt on external 32K crystal failure.
11 crystal oscillator connected to the XTAL_32K_P and XTAL_32K_N pins.
13 The app will ask for the crystal removal to simulate a crystal failure and trigger
30 Make sure you have your board connected over USB port and the external crystal is connected
58 [00:00:01.287,000] <inf> xt_wdt_sample: Remove the external 32K crystal to trigger the watchdog
/Zephyr-latest/drivers/clock_control/
DKconfig.npcx16 bool "Generate LFCLK by on-chip Crystal Oscillator"
19 is generated by the on-chip Crystal Oscillator (XTOSC).
20 This includes an on-chip oscillator, to which an external crystal
Dclock_control_mchp_xec.c155 #define XEC_CC_VBATR_CS_XTAL_EN BIT(8) /* enable & start external crystal */
156 #define XEC_CC_VBATR_CS_XTAL_SE BIT(9) /* crystal XTAL2 used as 32KHz input */
167 #define XEC_CC_VBATR_CS_PCS_VTR_VBAT_XTAL 0x10000u /* VTR & VBAT use crystal */
231 * the parallel crystal.
375 * crystal. Crystal cold start times may vary greatly based on many factors.
430 /* Turn off crystal when we are not using it */
444 * Start external 32 KHz crystal.
446 * If current configuration matches desired crystal configuration do nothing.
447 * NOTE: Crystal requires ~300 ms to stabilize.
464 /* Configure crystal connection before enabling the crystal. */ in enable_32k_crystal()
[all …]
/Zephyr-latest/soc/nordic/nrf54h/bicr/
Dbicr-schema.json161 "Low Frequency Crystal Oscillator (LFXO)",
184 "title": "Low Frequency Crystal Oscillator (LFXO) configuration",
190 "Crystal",
195 "CRYSTAL",
199 "default": "CRYSTAL"
236 "const": "CRYSTAL"
353 "Crystal",
357 "CRYSTAL",
360 "default": "CRYSTAL"
381 "const": "CRYSTAL"
/Zephyr-latest/drivers/rtc/
DKconfig.rv30285 bool "Micro Crystal RV3028 I2C extreme low power RTC driver"
10 Enable the Micro Crystal RV3028 I2C RTC driver.
DKconfig.rv82636 bool "Micro Crystal RV-8263-C8 RTC driver"
11 Micro Crystal RV-8263-C8 RTC driver.
/Zephyr-latest/soc/espressif/
DKconfig54 - 32768 Hz if the 32k crystal oscillator is used. For this use value 3000 or more.
55 In case more value will help improve the definition of the launch of the crystal.
56 If the crystal could not start, it will be switched to internal RC.
/Zephyr-latest/soc/microchip/mec/mec172x/reg/
Dmec172x_vbat.h46 /* Enable and start the external crystal */
48 /* single ended crystal on XTAL2 instead of parallel across XTAL1 and XTAL2 */
52 /* crystal amplifier gain control */
66 /* 32K external crystal when chip powered by VBAT or VTR */
70 /* 32K input pin on VTR. Switch to crystal on VBAT */
/Zephyr-latest/boards/nordic/nrf54h20dk/
Dbicr.json19 "mode": "CRYSTAL",
27 "mode": "CRYSTAL",
/Zephyr-latest/dts/bindings/clock/
Dnordic,nrf53-lfxo.yaml4 description: Nordic nRF low-frequency crystal oscillator (nRF53 series)
20 Type of load capacitors connected to the crystal.
Dnordic,nrf53-hfxo.yaml4 description: Nordic nRF high-frequency crystal oscillator (nRF53 series)
20 Type of load capacitors connected to the crystal.
Dsilabs,series2-lfxo.yaml4 Silicon Labs LFXO peripheral (low-frequency crystal oscillator).
25 Mode of operation. Defaults to "xtal", expecting a 32768 Hz crystal oscillator on XI and XO
Dnordic,nrf-lfxo.yaml4 description: Nordic nRF low-frequency crystal oscillator
20 Type of load capacitors connected to the crystal. If not specified,
Dnuvoton,numaker-scc.yaml17 Enable/disable 4~24 MHz external crystal oscillator (HXT)
26 Enable/disable 32.768 kHz low-speed external crystal oscillator (LXT)
Dmicrochip,xec-pcr.yaml37 description: Use single ended crystal connection to XTAL2 pin.
69 Delay in milliseconds after crystal is enabled and clock monitor is
81 description: Bypass clkmon check of crystal or XTAL2 single-ended clock.
Dnordic,nrf-hfxo.yaml4 description: Nordic nRF high-frequency crystal oscillator
20 Type of load capacitors connected to the crystal. If not specified,
Dsilabs,series2-hfrcodpll.yaml5 Can be used as a free-running RC oscillator or with PLL lock to the crystal oscillators HFXO
6 or LFXO. To enable PLL, set the `clocks` property to the source crystal oscillator, and set
/Zephyr-latest/samples/drivers/clock_control_xec/
DREADME.rst28 Dual-ended 32KHz Crystal jumper configuration
31 Jumper on JP1 1-2 connect crystal Y1 pin 1 to MEC172x XTAL1
32 Jumper on JP2 2-3 connect crystal Y1 pin 2 to MEC172x XTAL2
/Zephyr-latest/soc/atmel/sam/sam3x/
Dsoc.c47 * Setup main external crystal oscillator. in clock_init()
75 * With main crystal running at 12 MHz, in clock_init()
94 /* Disable internal fast RC if we have an external crystal oscillator */ in clock_init()
/Zephyr-latest/boards/nordic/nrf54l20pdk/doc/
Dindex.rst28 nRF54L20 PDK has two crystal oscillators:
30 * High-frequency 32 MHz crystal oscillator (HFXO)
31 * Low-frequency 32.768 kHz crystal oscillator (LFXO)
33 The crystal oscillators can be configured to use either

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