| 摘要 |
<p>Provided is a vehicle communication control device for which an isolation boundary equipped with a signal isolation means, in particular, a digital isolator, is configured between a high-voltage region and a low-voltage region, and which is capable of preventing erroneous output from the signal isolation means and of performing vehicle communications and microcomputer control correctly when the power supply voltage reduces due to, for example turning on of the power, or a power interrupt. Disclosed is a vehicle communication control device for which an isolation boundary equipped with a signal isolation means-a digital isolator-is configured between a microcomputer provided in a high-voltage region and a control signal transmission/reception means disposed in a low-voltage region, and which is characterized in that the signal isolation means is provided with a voltage monitoring means and an erroneous output prevention means that is capable of controlling or fixing the output, which is from the signal isolation means to the high-voltage side and/or the low-voltage side, to a safe output when the voltage detected by the voltage monitoring means with respect to variation is reduced down to a value out of a predetermined range.</p> |
