Designing specific systolic arrays with the API15C chip
1990
The API15C processor, a building block for different systolic structures, is designed exclusively for single-instruction-multiple data (SIMD) execution mode. To support this mode, the instruction set includes special control instructions. Three parallel I/O ports are available for different interconnection schemes. The API15C chip is designed in a CMOS 2- mu m technology. It contains 45000 transistors on a 6-mm $M6.2-mm silicon area. The functionality of the circuit was tested successfully after the first run. It executes one instruction per clock phase of 100 ns, giving a global rate of 10 MIPS. To validate this processing element as a building block for systolic structures, a programmable interface and two single board machines were developed. The first is an 18 processor linear structure able to support a wide range of applications. The second is a 28 processor bidimensional structure for a specific application of string comparison. The instruction set is particularly well-suited for SIMD operation. >
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