Data Integrity Check of a Multi-Variable Data Path
Original Publication Date: 1985-Sep-01
Included in the Prior Art Database: 2005-Feb-19
A technique is described for data and indicator integrity checking and self-implicating fault detection in a system where incoming data has no parity property, the indicator is random but associated with a group of nine bits, and both are manipulated. The data and indicator manipulation consist of 90» data rotation, buffering, deskewing and assembly with 17 other tracks, and finally demultiplexing into a symbol serial data stream with varying but predictable order. Picked and dropped bits and stuck l/stuck 0 conditions on logic blocks that can cause data to be altered, or erroneous presence or absence of an indicator, must be detected within the system that processes this data. In solving the problem, a 'C' bit is generated for each data path or track. 'C' bit generation is accomplished with reference to the figure by: a.