Inner disk data comparator with variable data and comparable results compression function

Application Number: 00108677
Application Date: 2000.05.17
Publication Number: 1274159
Publication Date: 2000.11.22
Priority Information: 1999/5/17 US 09/313016
International: G11C11/00;G11C29/00
Applicant(s) Name: Infineon Tech. North America Co.
Inventor(s) Name: G. Francofski
Patent Agency Code: 72001
Patent Agent: wu zengyong
Abstract A semiconductor memory chip (100) includes a memory array including memory components to be tested. A pattern generator (112) provides reference data to be input to and stored in the memory array. A comparator (110) is formed on the memory chip for comparing the reference data from the pattern generator and the stored data from the memory array. The comparator further includes logic circuitry (134) for comparing the reference data to the stored data from the memory array to provide a compare result. A plurality of latches (152) are included for receiving the compare result from the logic circuitry, the latches having a first state associated with the matched state wherein the first state is altered to a second state if the unmatched state is received from the logic circuitry. A register (160) for storing and outputting the first and second states of the latches to provide a test result is also included.