Clk config that should be stable.

CMakePresets.json

@@ -13,7 +13,7 @@
             "cacheVariables": {
                 "NCS_TOOLCHAIN_VERSION": "NONE",
                 "BOARD": "nrf54l15dk/nrf54l15/cpuapp",
-                "EXTRA_CONF_FILE": "iso.conf;internal_osc.conf;lfxo.conf",
+                "EXTRA_CONF_FILE": "iso.conf;clk.conf",
                 "CONF_FILE": "prj.conf",
                 "DTC_OVERLAY_FILE": "bl54l15_radio0_radio1.overlay"
             }

clk.conf

@@ -0,0 +1,9 @@
+# 1. Disable the Crystal and RC Oscillators
+CONFIG_CLOCK_CONTROL_NRF_K32SRC_XTAL=n
+CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC=y
+
+# 2. Enable the Synthesized Clock (LFSYNT)
+CONFIG_CLOCK_CONTROL_NRF_K32SRC_SYNTH=n
+
+# 3. Claim High Accuracy (Because it is backed by the HFXO)
+CONFIG_CLOCK_CONTROL_NRF_K32SRC_250PPM=y

internal_osc.conf

@@ -1,4 +0,0 @@
-# use internal 32kHz oscillator
-CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC=y
-# select desired accuracy (more calibrations would be nececcary if smaller) - I think the 32KHz oscillator is only needed for receive
-CONFIG_CLOCK_CONTROL_NRF_K32SRC_250PPM=y

lfxo.conf

@@ -1,4 +0,0 @@
-CONFIG_CLOCK_CONTROL=y
-CONFIG_CLOCK_CONTROL_NRF=y
-CONFIG_CLOCK_CONTROL_NRF_K32SRC_XTAL=y
-CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC=n

prj.conf

@@ -7,8 +7,8 @@ CONFIG_UART_INTERRUPT_DRIVEN=y
 
 CONFIG_CLOCK_CONTROL=y
 CONFIG_CLOCK_CONTROL_NRF=y
-CONFIG_CLOCK_CONTROL_NRF_K32SRC_XTAL=y
-CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC=n
+
+
 CONFIG_BT=y
 CONFIG_BT_CTLR=y
 CONFIG_BT_LL_SOFTDEVICE=y