| 摘要 |
PROBLEM TO BE SOLVED: To secure the resistance of an IC chip for mass production against noise, even if the resistance of the IC chip for mass production against noise tends to be deteriorated due to each chip size when the IC chip used in development in a control substrate section is changed to the IC chip for mass production. SOLUTION: The IC chip 230 for mass production has a variable noise filter section 233. By inputting communication data signals (noise removal data) stored in a master ECU 100 in advance to a communication circuit section 232 in the IC chip 230 of the control substrate section 200, the impedance of the variable noise filter section 233 is changed by the communication circuit section 232, so that the IC chip 230 satisfies reference noise resistance. COPYRIGHT: (C)2008,JPO&INPIT
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