Signal processing apparatus with memory access history storage
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsYasushi Ueda, Takahiro Watanabe
Life of this patent
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Abstract
In a signal processing apparatus having a memory and plural blocks for accessing the memory provided in an LSI, for the ease of cause analysis in the event of a fault, a trace control block 170 is provided, and by setting from a microcomputer 110, start and end of storing of access history from the required memory access block and content of storing are controlled, and a specified region of the memory is traced. In the event of a fault, by reading out the specific tracing region in the built-in memory 160 from outside, the cause can be analyzed easily.
Claims7
A signal processing apparatus having a memory and plural blocks for accessing the memory provided inside an LSI comprising an arbitration block for receiving each memory use request signal issued from said memory access blocks, arbitrating the memory use right, and accessing the memory, and a trace control block for issuing a memory request signal for storing a memory access history of a predetermined block of said plural blocks in said memory on the basis of said result of arbitration, and controlling start and end of storing of the memory access history in the memory and the content of storing.
Dependencies are inferred from the claim text.