A 16-bit three port arithmetic logic and shift unit

The DSP division of Analog Devices is producing a CMOS, 75ns, 16 bit Arithmetic, Logic, and Shift Unit (ALSU). The ADSP-1200 features a 16-bit wide ALU, three ports, on board barrel shifter in parallel with the ALU, versatile register files, priority encoder and highly fielded instruction set. The device was specifically optimized to efficiently handle algorithms typically found in DSP. The first section of this paper gives an overview of the ADSP-1200. The second section describes the architecture and functionality of the device. Finally, the instruction set is briefly described. The ADSP-1200 shows that high speed CMOS combined with advanced packaging techniques results in effective, producible devices for DSP problems.