Patent ID: 9651618
Date: 2017-05-16
CPC Classifications: G01R,G06F,G11C

Claim:
1. An electronic device comprising: a set of two or more scan chains; and a buffer chain, wherein: each of the scan chains has an input end and an output end, which are opposite ends of the respective scan chain, and each of the scan chains comprises a sequence of stateful elements connected in series between the input end and the output end, and each of the scan chains is arranged to hold a string having a length identical to a length of the respective scan chain, the electronic device is arranged to shift the strings of the scan chains in parallel from the scan chains into a memory unit via the respective output ends in a store operation and back from the memory unit into the respective scan chains via the respective input ends in a restore operation, wherein the store operation and the restore operation each comprise at least N the set of scan chains includes a long chain, a short chain and a detour chain, wherein the long chain has a length N the buffer chain has a length of K=N