The following table lists the U-Boot file associated with each ConnectCore 8X variant:

CPU type/ RAM size SOC revision U-Boot file U-Boot defconfig

any

RevC

imx-boot-ccimx8x-sbc-pro-C0.bin-flash_spl

ccimx8x_sbc_pro_defconfig

RevB

imx-boot-ccimx8x-sbc-pro-B0.bin-flash_spl

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

U-Boot SPL dub-2020.04-r6.1 (Sep 19 2023 - 07:15:55 +0000)
Normal Boot
Trying to boot from MMC1
Primary set selected
Load image from MMC/SD 0x59c00


U-Boot dub-2020.04-r6.1 (Sep 19 2023 - 07:15:55 +0000)

CPU:   NXP i.MX8QXP RevC A35 at 1200 MHz at 33C
DRAM:  2 GiB
MCA:   HW_VER=1  FW_VER=1.01
MMC:   FSL_SDHC: 0, FSL_SDHC: 1
In:    serial
Out:   serial
Err:   serial
Model: Digi International ConnectCore 8X SBC Pro Board.
ConnectCore 8X SOM variant 0x02: 2 GiB LPDDR4, Wi-Fi, Bluetooth, MCA, Crypto-auth
  Board version 3, ID 135
Boot:  MMC0

 BuildInfo:
  - SCFW 6638c032, SECO-FW c9de51c0, IMX-MKIMAGE 3bfcfccb, ATF e4b2dbf
  - U-Boot dub-2020.04-r6.1

flash target is MMC:0
Net:   eth0: ethernet@5b040000 [PRIME], eth1: ethernet@5b050000
Fastboot: Normal
Normal Boot
Hit any key to stop autoboot:  0
=>
NXP released two revisions of the SOC silicon: revision B0 and revision C0. See SOC revisions for more information.

U-Boot might show less DRAM than the nominal. This is due to elements such as the secure monitor (OP-TEE) reserving part of the memory.