Input Power Connector; Coin Cell Connector; Boot Mode - Digi ConnectCore 8X Hardware Reference Manual

Interfaces
Connector Interface
J12-J13 XBee module
J14 3V3_EXT
J15 VIN
J16 VCC_MCA
J18 Touch controller
J19 MCA SWD (not populated by
default)

Input power connector

A 5V DC-in power jack connector (J2) provides power to the ConnectCore 8X SBC Express system.
From this 5V power supply, a 3.3V LDO generates the power supply for the on-module MCA.

Coin cell connector

A 2-pin, 1.25 mm pitch straight connector (J4), not populated by default, can be used to connect an
external coin cell battery or supercap for powering the system's real-time clock (RTC) when the main
power supply is removed.
The RTC can be powered with a primary Lithium cell (non-rechargeable), a secondary Lithium cell
(rechargeable) or a supercap.
The following table shows the pinout of the coin cell connector:
Pin Signal name Description
1 VCC_LICELL
2 GND

Boot mode

By default, the ConnectCore 8X system-on-module boots from the internal board settings, allowing it
to boot from the internal eMMC flash memory. For advanced functionality, the ConnectCore 8X SBC
Express provides two switches (S3) to configure the SoM boot mode:
ConnectCore® 8X SBC Express Hardware Reference Manual -- Preliminary
Power supply for RTC
Manufacturer Manufacturer part number
Samtec SQT-110-01-F-S
Samtec TSW-102-07-G-S
Samtec TSW-102-07-G-S
Samtec TSW-102-07-G-S
Sullins GBC05SBSN-M89
Samtec FTSH-105-01-F-DV
Input power connector
10