Hy Jones!
This is from the Part 1 AMM:
The ADIRU sends total air pressure and temperature data to the EEC. The EEC uses this data to control engine thrust.
The FMC controls the CDU. The FMC gets and sends CDU commands to the EEC through the DEUs. The FMC also supplies some airplane data to the EEC through the DEUs. The CDU shows EEC maintenance data and sends commands to the EEC to do system BITE tests.
The FDAU collects engine parameter data. It sends this data to the flight data recorder (FDR).
brgds
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