- 专利标题: Hardware assisted scheme for testing memories using scan
-
申请号: US14714381申请日: 2015-05-18
-
公开(公告)号: US09892802B1公开(公告)日: 2018-02-13
- 发明人: Bo Yang , Andrew J. Copperhall , Bibo Li , Vijay M. Bettada
- 申请人: Apple Inc.
- 申请人地址: US CA Cupertino
- 专利权人: Apple Inc.
- 当前专利权人: Apple Inc.
- 当前专利权人地址: US CA Cupertino
- 代理机构: Meyertons, Hood, Kivlin, Kowert & Goetzel, P.C.
- 代理商 Erik A. Heter
- 主分类号: G11C29/10
- IPC分类号: G11C29/10 ; G01R31/3177 ; G11C29/50
摘要:
A hardware assisted scheme for testing IC memories using scan circuitry is disclosed. An IC includes a memory implemented thereon and a chain of serially-coupled scan elements to enable the inputting of test vectors. The scan elements include first and second subsets forming write and read address registers, respectively, a first control flop, and a second control flop. During a launch cycle of a test operation, a first address loaded into the write address register is provided to a write address decoder to effect a write operation. Also responsive to the launch cycle, the first control flop is configured to cause the first address to be provided to the read address register, while the second control flop causes data to be written into the memory. During a capture cycle, the first address is provided to a read address decoder and the second control flop causes a read of data therefrom.
信息查询