Resources Contact Us Home
Restricting the damaging effects of software faults on test and configuration circuitry

Image Number 6 for United States Patent #6578166.

A system that restricts the damaging effects of software faults that interact with test and configuration circuitry. This test and configuration circuitry includes a scan chain in the form of a serial linkage between memory elements within a circuit, thereby allowing a test input to be serially shifted into the memory elements. The system operates by receiving a test disable signal at the circuit. In response to the test disable signal, the system moves the circuit into a test disable mode, which limits any damaging effects to the circuit caused by shifting the test input into the memory elements in the scan chain. Next, the system shifts the test input into the memory elements in the scan chain. T he system also determines whether the test input will cause damage to the circuit after the test input is completely shifted into the scan chain. If so, the system holds the circuit in the test disable mode so that the test input cannot damage the circuit. If not, the system moves the circuit out of test disable mode, and runs the circuit for at least one clock cycle in order to test the circuit.

  Recently Added Patents
Coated article and method for making the same
EpCAM as a reprogramming factor for non-pluripotent cells
Mobile computing terminal
Resistive memory element sensing using averaging
Business card assembly
Method, apparatus, and system for energy efficiency and energy conservation including dynamic cache sizing and cache operating voltage management for optimal power performance
Communicating channel state information using predictive vector quantization
  Randomly Featured Patents
Method and device for making substrates
Pendant setting
Inflator for air bag
Multi-compartment resealable storage bag
Method and apparatus for dispensing live fishing bait
Hand shower
Limitation of distortion introduced by a post-processing step during digital signal decoding
Chime device having quickly releasable chime members
Aryl-8-azabicyclo[3.2.1]octanes for the treatment of depression
Communication apparatus and control method of the apparatus