QB-V850ESFJ3 Preliminary User’s Manual ZUD-CD-05-0149 50/57
APPENDIX A CHARACTERISTICS OF TARGET INTERFACE
The target interface (signals connecting the in-circuit emulator and target system) operate, in terms of function,
as if an actual device were connected. The characteristics, however, may be different from those of the actual
device. The target interface of the QB-V850ESFJ3 is one of the equivalent circuits shown below.
Figure A-1. Equivalent Circuit A
Figure A-2. Equivalent Circuit B
Figure A-3. Equivalent Circuit C
Target system side
QB-V850ESFJ3 side
FPGA
(XC3S1500)
Voltage level shifter
(
μ
PD7885)
VCCB VCCA
B
A
3.3 V
Same voltage as EV
DD
Target system side
QB-V850ESFJ3 side
Emulation CPU
(
μ
PD703195)
FPGA
(XC3S1500)
Voltage level shifter
(
μ
PD7885)
VCCB VCCA
B
A
3.3 V
Same voltage as BV
DD
Target system side
QB-V850ESFJ3 side
Port pin
Emulation CPU
(
μ
PD70F3380)