Abstract:
PROBLEM TO BE SOLVED: To detect a break of a connection circuit between LSIs without any interruption of data processing by the respective LSIs and to easily locate the break part. SOLUTION: A data processing part 1 carries out data processing of previously decided contents on an inputted data signal 31 and outputs it as a data signal 32. A circuit break detection part 3 is synchronized with a circuit break detection clock 35, detects a break of the connection circuit between the LSIs (not shown) connected to the pervious step according to a result of the detection of the inspection signal, which is inserted into the data signal 31 outputted from the LSI connected to the previous step, and outputs a circuit break detection alarm 34. A pattern signal insertion part 2 inserts the inspection signal to the data signal 32 for detection of the break of the connection circuit with the LSI (not shown) connected to the following step by the LSI connected to the following step and outputs it to the LSI connected to the following step. COPYRIGHT: (C)2003,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a device and method for storage device monitoring which performs monitoring of an address bus with a simple structure and low expenses. SOLUTION: A vertical parity operation is performed in a parity operation circuit 40 with data 37 and an address 32 as objects at the time of data writing, the result of vertical parity operation of this 'address + data' is added to writing data 37 as a parity bit 39 and written in a single port memory. 30. At the time of reading the data, the parity bit 39, which is read at the same time as the data 37 read from the single port memory 30, and the vertical parity operation result of a read memory address as the address 32 given to the single port memory 30 held in an address holding circuit 36 and read-out data 37 are compared at a parity comparison circuit 42, and address bus monitoring is performed by notifying it as a monitoring result 41. COPYRIGHT: (C)1999,JPO