NEC V850/SV1 User Manual
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Contents
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User’s Manual U14337EJ1V0UM00 27CHAPTER 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 BV DD 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 thesupply 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 offand operates at 3.3 V.Figure 4-1. Schematic Diagram of Power Supply AcquisitionIE-703040-MC-EM1V850/SV1I/O chipTarget systemEvaluation chipIE-703002-MCTarget voltageemulationRelayBV DD < 1 VBV DD ≥ 1 VBV DDV DDBV DD |
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