Patent ID: 7562273
Filing Date: 2009-07-14
Classification: G11C

Abstract:
1. A register file cell comprising: a primary storage portion configured to store a first value, said primary portion having associated therewith a read data true terminal and a read data complementary terminal; a secondary storage portion coupled to said primary storage portion and configured to function as a scan latch during test operation, said secondary storage portion being configured to store a second value during normal operation, said second value being a duplicate of said first value, said secondary storage portion having associated therewith a scan complementary terminal and an rf12 terminal; and an error detection portion coupled to said primary storage portion and said secondary storage portion and configured to indicate a difference between said first value and said second value caused by a soft error; wherein: said error detection portion comprises an XOR gate, said XOR gate having four inputs coupled, respectively, to said read data true terminal, said read data complementary terminal, said scan complementary terminal and said rf12 terminal.