CHAPTER 4 DIFFERENCES BETWEEN TARGET DEVICE AND TARGET INTERFACE CIRCUIT
User’s Manual U16115EJ2V0UM
37
(3) Other
signals
Refer to
Figure 4-3 Equivalent Circuit 3 of Emulation Circuit
.
• V
DD
pin
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 supplied from the power voltage supply pin (TP1)
(LV
CC
) when the target system is connected. In the IE-789306-NS-EM1, the V
DD
pin of the target system
is exclusively used for controlling LED1 (USER VDD), which monitors whether the power of the target
system is on.
• V
SS
pin
The V
SS
pin is connected to GND in the IE-789306-NS-EM1.
• IC/V
PP
pin
The IC/V
PP
pin is not used in the IE-789306-NS-EM1.
Figure 4-3. Equivalent Circuit 3 of Emulation Circuit
•
Probe side
(Target system)
•
IE system side
(IE-789306-NS-EM1)
100
Ω
100
Ω
1 M
Ω
0.1 F
1 M
Ω
22 F
OPEN
G6H-2F
(Relay)
+
+
−
PC393
+
−
PC393
Power supply
detection
Power supply
generation
Filter
V
DD
V
SS
IC/V
PP
TP1
(LV
DD
)
TP1
(GND)
µ
µ
µ
µ