The ConnectCore 6 platform uses U-Boot (Universal Bootloader) as primary bootloader. U-Boot is an open-source project. You can find standard documentation about commands, environment variables, Flattened Device Tree support, and more at www.denx.de/wiki/U-Boot/Documentation.
About this guide
This guide only describes specific changes made to the standard U-Boot by Digi International.
Version
U-Boot for ConnectCore 6 is based on standard U-Boot v2017.03 plus NXP patches at https://github.com/nxp-imx/uboot-imx.
Supported interfaces
The U-Boot for ConnectCore 6 supports the following interfaces:
-
UART4 for console (115200/8/N/1)
-
DDR3
-
eMMC
-
microSD card
-
10/100/1000Mbps Ethernet on Micrel KSZ9031 PHY (RGMII)
-
I2C multi-port
-
One-Time-Programmable (OTP) bits
Carrier board version and ID
Digi uses non-volatile media to store the carrier board version and ID. See Carrier board version and ID.