发明名称 |
Microcomputer having built-in nonvolatile memory and check system thereof |
摘要 |
When a built-in nonvolatile memory in a microcomputer is tested, a control program prestored in a boot ROM is run upon entering a test command from an external communication device; a test program is transferred from the external communication device to a built-in RAM through a communication circuit; a control of a CPU is switched to the built-in RAM after the test program has been transferred and a test is conducted on the nonvolatile memory; and a test result and a fail log are transferred to the external communication device through the communication circuit. Consequently, the built-in nonvolatile memory in the microcomputer can be checked without leaving the test program on the chip. <IMAGE> |
申请公布号 |
EP1050816(A3) |
申请公布日期 |
2001.02.07 |
申请号 |
EP20000303065 |
申请日期 |
2000.04.12 |
申请人 |
SHARP KABUSHIKI KAISHA;NIPPON TELEGRAPH AND TELEPHONE CORPORATION |
发明人 |
SHIGEMASA, HARUHIKO;YAEGAWA, KAZUHIRO;TANNO, MASAAKI;SHIMOYAMA, NOBUHIRO;TAKEDA, TADAO |
分类号 |
G06F12/16;B42D15/10;G01R31/319;G06F11/22;G06F11/26;G06F11/273;G06F15/78;G06K19/07;G06K19/073;G06K19/077;G11C29/52 |
主分类号 |
G06F12/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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