| 摘要 |
1527167 Data storage TELEFONAKTIEBOLAGET LM ERICSSON 24 Sept 1976 [29 Sept 1975] 39859/76 Heading G4A The clocking of data through a series of registers is checked by monitoring the propagation of a marker bit through a chain of bistables, one bistable for each register, the absence of one or more clock signals preventing the marker bit from propagating through the chain. The bistables may be spare stages in the registers. The marker bit is preferably inserted and repropagated through the chain after each successful propagation. The position of a fault may be localized by monitoring the propagation of a marker bit through each of a number of series connected blocks of registers and, after detecting a fault, monitoring the marker bit propagation within the block of registers containing the fault. Data flow through the registers may also be subject to a parity check. |
