The asynchronous array of simple processors (AsAP) architecture comprises a 2-D array of reduced complexity programmable processors with small scratchpad memories interconnected by a reconfigurable mesh network. AsAP was developed by researchers in the VLSI Computation Laboratory (VCL) at the University of California, Davis and achieves high performance and energy-efficiency, while using a relatively small circuit area. It was made in 2006. AsAP processors are well suited for implementation in future fabrication technologies, and are clocked in a globally asynchronous locally synchronous (GALS) fashion. Individual oscillators fully halt (leakage only) in 9 cycles when there is no work to do, and restart at full speed in less than one cycle after work is available. The chip requires no crystal oscillators, phase-locked loops, delay-locked loops, global clock signal, or any global frequency or phase-related signals whatsoever. The multi-processor architecture efficiently makes use of task-level parallelism in many complex DSP applications, and also efficiently computes many large tasks using fine-grained parallelism. Key features AsAP uses several novel key features, of which four are: Chip multi-processor (CMP) architecture designed to achieve high performance and low power for many DSP applications. Small memories and a simple architecture in each processor to achieve high energy efficiency. Globally asynchronous locally synchronous (GALS) clocking simplifies the clock design, greatly increases ease of scalability, and can be used to further reduce power dissipation. Inter-processor communication is performed by a nearest neighbor network to avoid long global wires and increase scalability to large arrays and in advanced fabrication technologies. Each processor can receive data from any two neighbors and send data to any combination of its four neighbors. AsAP 1 chip: 36 processors A chip containing 36 (6x6) programmable processors was taped-out in May 2005 in 0.18 μm CMOS using a synthesized standard cell technology and is fully functional. Processors on the chip operate at clock rates from 520 MHz to 540 MHz at 1.8V and each processor dissipates 32 mW on average while executing applications at 475 MHz. Most processors run at clock rates over 600 MHz at 2.0 V, which makes AsAP among the highest known clock rate fabricated processors (programmable or non-programmable) ever designed in a university; it is the second highest known in published research papers. At 0.9 V, the average application power per processor is 2.4 mW at 116 MHz. Each processor occupies only 0.66 mm². AsAP 2 chip: 167 processors A second generation