Hardware and firmware developments for the upgrade of the ATLAS Level-1 Central Trigger Processor

G. Anders, H. Bertelsen, A. Boisen, T. Childers, M. Dam, N. Ellis, P. Farthouat, C. Gabaldon Ruiz, M. Ghibaudi, B. Gorini, S. Haas, M. Kaneda, C. Ohm, M. Silva Oliveira, T. Pauly, R. Poettgen, K. Schmieden, R. Spiwoks, S. Xella