The HEX20 AX Command & Data Handling (CDH) system is aligned with the AX CubeSat architecture and uses a SmartFusion 2 system on chip with an ARM Cortex M3 processor. CDH utilizes a system on module (SoM), which integrates a system on chip (SoC) from Microsemi. This SoC incorporates a microprocessor embedded in FPGA technology. It provides standard communication interfaces, storage, and an on-board IMU unit. 

The CDH's primary functions include collecting housekeeping data from all subsystems and science data from the payload. Additionally, it facilitates subsystem configuration and houses a Real-Time Counter (RTC) for precise time tagging of data. The CDH board has a PC104 connector to interact with the subsystems. The main feature is that it provides 15 configurable IOs to meet the payload requirements.