User’s Manual U14337EJ1V0UM00 27
CHAPTER 4 CAUTIONS4.1 VDD and BVDD of Target System
(1) BVDD in the target system is not connected to BVDD in the evaluation chip in the IE-703002-MC.
The IE-703002-MC uses BVDD of the target system for the following purposes:
•Power ON/OFF detection of target system
•BVDD emulation of target system
(2) When the voltage of the target system is 1 V or higher, the evaluation chip in the emulator operates using the
supply of VDD from the target system. The power consumption is equivalent to that of the V850/SV1.
(3) When the voltage of the target system is lower than 1 V, the emulator recognizes the target system power is off
and operates at 3.3 V.
Figure 4-1. Schematic Diagram of Power Supply Acquisition
IE-703040-MC-EM1
V850/SV1
I/O chip
Target system
Evaluation chip
IE-703002-MC
Target voltage
emulation
Relay
BV
DD
< 1 V
BV
DD
≥
1 V
BV
DD
V
DD
BV
DD