Stage tracer
AssigneeHitachi, Ltd.
InventorKatsuro Wakai
Life of this patent
Estimating the term…
Abstract
A stage tracer comprising a plurality of tracing units which are physically independent of one another and each of which includes a memory unit and the associated read/write control logic unit, and a common control unit provided physically independent of and electrically connected with the tracing units, to supply desired control signals to the respective read/write control logic units. In each tracing unit, under the control of the common control unit, the read/write control logic unit causes the signals to be observed to be written in the memory unit and also causes the content of the memory unit to be read out onto the data bus common with all the tracing units.
Claims2
A stage tracer comprising:
- a plurality of tracing units which are physically independent of one another, each tracing unit including a memory unit having terminals for receiving signals to be observed and a read/write control logic unit for controlling the writing and reading of data into and out of said memory unit;
- a common control unit provided physically independent of said tracing units and connected electrically with said tracing units through a signal line group, to supply the control signal desired to said read/write control logic units of said tracing units through said signal line group;
- and
- a data bus for connecting the outputs of said tracing units with said common control unit, wherein said read/write control logic units cause said signals to be observed to be written in the corresponding memory units and also cause the contents of said memory units to be sequentially read onto said data bus through the output terminals of the corresponding tracing units in response to said control signals from said common control unit.
Dependencies are inferred from the claim text.