| 摘要 |
PROBLEM TO BE SOLVED: To provide a data transmission/reception device capable of highly accurately detecting the supply voltage Vc2 of EOPECU 30 by ISMECU 50.SOLUTION: A communication line L2 has been pulled up to the supply voltage Vc2 of EOPECU 30 via a pull-up resistor 36. ISMECU 50 includes a sensing line L4 for sensing the voltage of the communication line L2, and a voltage follower 66 is connected to the sensing line L4 via a voltage-dividing resistor 67. A pull-up voltage Vp2 which is the output voltage of the voltage follower 66 is sampled by an A/D converter 54a.SELECTED DRAWING: Figure 1 |
