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Missing crystal calibration token

On some early DKNCZ20 boards the crystal calibration token can be deleted when using j-flash

Was my crystal calibration deleted?

To check if your DKNCZ20 is missing the crystal calibration use Trident Elcap to read the TR_MFG_TOKEN_XTAL_TRIM token. If the token is 0xFFFF and the DKNCZ20 board in in the list in List of affected boards and crystal calibration values, then the crystal calibration token has been deleted.

Recover the crystal calibration

The crystal calibration values for the affected boards can be found here List of affected boards and crystal calibration values

Using ElCap:

The Crystal Calibration Token (TR_MFG_TOKEN_XTAL_TRIM) can be set using Trident Elcap

Using Radio CLI:

Download Radio CLI to the board:

elcap flash --usb 900039473 --target T32CZ20 --file c:\Users\user_name\AppData\Local\tridentiot\elcap\sdks\v2025.03.00-beta00\z-wave\bin\zw_radio_cli_signed_combined.hex

Connect to the board uart with a terminal program and type the command:

cal-xtal store <value from table>

The crystal calibration for DKNCZ20 can be stored securely so it can not be erased by using the following command (SDK version 2025.05.00 or later):

cal-xtal internal store <value from table>

NOTE that this command is only for use with the DNKCZ20 command and should not be used with other products.

List of affected boards and crystal calibration values

Serial Number	Xtal Calibration
12512000001	17
12512000002	17
12512000003	15
12512000004	15
12512000005	16
12512000006	16
12512000007	15
12512000008	17
12512000009	14
12512000010	14
12512000011	16
12512000012	16
12512000013	15
12512000014	12
12512000015	16
12512000016	16
12512000017	15
12512000018	16
12512000019	15
12512000020	13
12512000021	17
12512000022	17
12512000023	17
12512000024	16
12512000025	14
12512000026	15
12512000027	13
12512000028	15
12512000029	14
12512000030	11
12512000031	11
12512000032	17
12512000033	17
12512000034	16
12512000035	17
12512000036	17
12512000037	14
12512000038	12
12512000039	11
12512000040	19
12512000041	17
12512000042	14
12512000043	14
12512000044	17
12512000045	15
12512000046	16
12512000047	15
12512000048	20
12512000049	14
12512000050	16
12512000051	17
12512000052	13
12512000053	18
12512000054	15
12512000055	16
12512000056	14
12512000057	13
12512000058	14
12512000059	18
12512000060	19
12512000061	16
12512000062	13
12512000063	12
12512000064	14
12512000065	15
12512000066	14
12512000067	14
12512000068	16
12512000069	14
12512000070	14
12512000071	17
12512000072	14
12512000073	15
12512000074	14
12512000075	14
12512000076	13
12512000077	12
12512000078	15
12512000079	18
12512000080	13
12512000081	15
12512000082	14
12512000083	17
12512000084	18
12510000085	15
12510000086	17
12510000087	16
12510000088	16
12510000089	14
12510000090	15