BECA S DPU WILL CONTAIN THREE MODULES: A LOW-VOLTAGE POWER MODULE A HIGH-VOLTAGE POWER MODULE (TO POWER THE CEBR3 GRS) AND A PROCESSOR MODULE. ALL MODULES ARE COUPLED THROUGH A COMMON BACKPLANE CONNECTOR A DESIGN BASED ON MANY PRIOR APL DPUS. THE PROCESSOR BOARD WILL CARRY OUT BECA COMMAND AND CONTROL HEALTH AND STATUS MONITORING DATA PROCESSING AND FORMATTING FUNCTIONS FOR THE CEBR3 GRS. IT WILL ALSO INTERFACE WITH THE PNG CONTROLLER FOR OPERATION OF THE PNG. THE DESIGNS OF THE BECA DPU MODULES ARE BASED UPON SIMILAR MODULES BUILT AND TESTED USING NASA INSTRUMENT DEVELOPMENT FUNDING (LAWRENCE ET AL. 2017). THESE MODULES ALSO CURRENTLY SERVE AS THE BASELINE DESIGN FOR THE PSYCHE GRNS (PEPLOWSKI ET AL. 2018). THE DPU S MECHANICAL DESIGN IS ALREADY FLIGHT QUALIFIED WITH HERITAGE BASED ON PRIOR APL INSTRUMENTS FROM THE VAN ALLEN PROBES AND PARKER SOLAR PROBE MISSIONS (E.G. MITCHELL ET AL. 2013). FOR THIS DEVELOPMENT A NEW DPU CONSISTING OF THE THREE BOARDS WILL BE BUILT USING THE SAME DESIGNS AS OUR CURRENT PROTOTYPE DPU (FIGURE 1). UPDATES TO THE FLIGHT SOFTWARE AND THE FIELD PROGRAMMABLE GATE ARRAYS (FPGA) WILL BE INCORPORATED TO ACCOMMODATE THE PNG OPERATION AND GRS TIME-TAGGING DATA ACQUISITION. BECAUSE OF THIS NEW FLIGHT SOFTWARE AND FPGA WORK THE DPU S ENTERING TRL IS 5; AT THE CONCLUSION OF THE WORK THE DPU WILL BE TRL 6. THIS WORK WILL BE CARRIED OUT IN YEAR 1 OF THE PROJECT BASED ON HERITAGE FROM SIMILAR BOARDS THAT WERE DESIGNED AND BUILT AS PART OF A CURRENT NASA-FUNDED INSTRUMENT DEVELOPMENT PROJECT FROM THE MATISSE PROGRAM. THE TESTING OF THE BOARDS WILL BE CARRIED OUT BY CONNECTING THE BOARDS TO OUR ALREADY EXISTING GAMMA-RAY SPECTROMETERS AND MAKING MEASUREMENTS OF GAMMA-RAYS USING SEALED RADIOACTIVE SOURCES AND OUR APL NEUTRON GENERATOR.