Implementation of Error Detection and Correction (EDAC) in the Static RandomAccess Memory (SRAM) Aboard Petite Amateur Navy Satellite (PANSAT)

摘要

This thesis documents the design of a bus controller that provides EDACcapability to the SRAM of an Intel M8OC 1 86XL Microprocessor running at 7.3728 MHz. The system was designed for use during a two-year mission in a low earth orbit on board PANSAT. The system uses standard CMOS components together with the Harris ACS630MS EDAC circuit to provide dual-bit error detection with single-bit error correction. The single-bit error correction process is transparent to the microprocessor. All single-bit errors detected are automatically corrected in memory during the same bus cycle in which they are detected. The EDAC circuit computes the check bits based upon a 16-bit data word. Byte write capability is provided by using a read-modify-write method. The system was built on a wire wrap development board and tested for proper operation. (KAR) P. 2.