The following table lists the U-Boot file associated with each ConnectCore 6 variant:

CPU RAM size U-Boot file U-Boot defconfig

QuadDual

2GB

u-boot-ccimx6qsbc2GB-2017.03-r0.imx

ccimx6qsbc2GB_defconfig

1GB

u-boot-ccimx6qsbc-2017.03-r0.imx

ccimx6qsbc_defconfig

512MB

u-boot-ccimx6qsbc512MB-2017.03-r0.imx

ccimx6qsbc512MB_defconfig

DualLite

1GB

u-boot-ccimx6dlsbc-2017.03-r0.imx

ccimx6dlsbc_defconfig

512MB

u-boot-ccimx6dlsbc512MB-2017.03-r0.imx

ccimx6dlsbc512MB_defconfig

Check your variant CPU and RAM size on the serial console boot log:

U-Boot dub-2017.03-r7.1 (Oct 02 2020 - 15:35:14 +0000)

CPU:   Freescale i.MX6Q rev1.5 1200 MHz (running at 792 MHz)
CPU:   Extended Commercial temperature grade (-20C to 105C) at 38C
Reset cause: POR
I2C:   ready
DRAM:  1 GiB
MMC:   FSL_SDHC: 0 (eMMC), FSL_SDHC: 1
In:    serial
Out:   serial
Err:   serial
Model: Digi International ConnectCore 6 Single Board Computer.
ConnectCore 6 SOM variant 0x02: Consumer quad-core 1.2GHz, 4GB eMMC, 1GB DDR3, -20/+70C, Wireless, Bluetooth, Kinetis
Board: ConnectCore 6 SBC, version 3, ID 129
Boot device: MMC4
PMIC:  DA9063, Device: 0x61, Variant: 0x50, Customer: 0x00, Config: 0x56
Net:   FEC [PRIME]
Hit any key to stop autoboot:  0
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