Address generating device for memory tester

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371 27, 371 24, G11C 2900

Patent

active

060195010

ABSTRACT:
In an address generating device wherein addresses are generated by an address computation part in response to data and control signals read out of an instruction memory and are provided to a memory under test, a command control bit for storing a command control signal is provided in the instruction memory and a command register is provided for storing a command read out of a data area of the instruction memory. The output from the address computation part and the output from the command register are input into a first multiplexer, which selects either one of the two inputs in response to a command control signal read out of the command control bit. The output from the first multiplexer is applied to a descrambler, wherein it is translated to a physical address. A second multiplexer is provided for selecting either one of the outputs from the descrambler and the first multiplexer in such an instance. The second multiplexer is controlled by a descramble inhibit signal read out of a descramble inhibit bit in the instruction memory.

REFERENCES:
patent: 4293950 (1981-10-01), Shimizu et al.
patent: 4300234 (1981-11-01), Maruyama et al.
patent: 4555663 (1985-11-01), Shimizu
patent: 4631724 (1986-12-01), Shimizu
patent: 4701918 (1987-10-01), Nakajima et al.
patent: 4701919 (1987-10-01), Maitoh et al.
patent: 4754424 (1988-06-01), Watanabe

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