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One-chip microcomputer and control method for said one-chip microcomputer
One-chip microcomputer and control method for said one-chip microcomputer
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机译:单片机及该单片机的控制方法
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摘要
In order to provide a built-in self testing function, a one-chip microcomputer is equipped with an activation register for activating the test operation and a built-in self test activation pattern generator for setting initial values at test control circuits (pseudo random number generator, logical circuit testing compressor, pattern generator, and memory testing compressor). In accordance with an instruction from the CPU, a built-in self test is activated so that the results of tests of the memory and the group of logical circuits are read from the memory testing compressor and the logical circuit testing compressor, and respectively compared with expected values preliminarily stored in the memory in the one-chip microcomputer; thus, the results are diagnosed. Thus, it is possible to carry out a built-in self test without using a plurality of exclusively-used test terminals.
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