NEC IE-789860-NS-EM1 User Manual page 34

CHAPTER 4
(3) Other signals
Refer to Figure 4-3 Equivalent Circuit 3 of Emulation Circuit.
• V pin
DD
The power supply of the emulation CPU operates on the internal power supply voltage (5 V) when the
target system is not connected, and on the voltage (LV
(TP1) when the target system is connected. In the IE-789860-NS-EM1, the V
exclusively used for controlling LED1 (USER VDD), which monitors whether the power of the target system
is on.
• V pin
SS
The V pin is connected to GND in the IE-789860-NS-EM1.
SS
• IC/V pin
PP
The IC/V pin is not used in the IE-789860-NS-EM1.
PP
• Probe side
(Target system)
V
DD
TP1
(LV )
CC
V
SS
TP1
(GND)
IC/V
PP
34
DIFFERENCES BETWEEN TARGET DEVICE AND TARGET INTERFACE CIRCUIT
Figure 4-3. Equivalent Circuit 3 of Emulation Circuit
100 Ω
µ
0.1 F 1 MΩ
Filter
100 Ω
+
µ
22 F
OPEN
User's Manual U16499EJ1V0UM
) supplied from the power voltage supply pin
CC
+
µ
−
PC393
G6H-2F
(Relay)
+
µ
−
PC393
1 MΩ
pin of the target system is
DD
• IE system side
(IE-789860-NS-EM1)
Power supply
detection
Power supply
generation