CHAPTER 4 DIFFERENCES BETWEEN TARGET DEVICES AND TARGET INTERFACE CIRCUITS
User’s Manual U16290EJ1V0UM
38
Figure 4-2. Equipment Circuit of Emulation Circuit 2
100
Ω
LV
CC
LV
CC
100
Ω
4.7 k
Ω
1 M
Ω
HSK120
HSK120
Open
SEL
RESET
V
ROUT
X2 (CL2),
XT2
X1 (CL1),
XT1
Open
Open
HC4066
47 F
µ
RESET
X1, XT1
V
ROUT
Probe side
(Target system)
IE system side
(3) Other signals
Refer to
Figure 4-3 Equivalent Circuit of Emulation Circuit 3
.
•
V
DD
pin
The emulation CPU operates on the internal power supply (3 V) when not connected to the target system, and
operates on the voltage (LV
CC
) supplied from the low voltage supply pin (TM1) when connected to the target
system.
The V
DD
pin of the target system is used only to control the LED1 that indicates whether the target system’s
power is on or off in the IE-789835-NS-EM1.
•
V
SS
pin
The V
SS
pin is are connected to GND in the IE-789835-NS-EM1.
•
IC/V
PP
pin
The IC/V
PP
pin is not used in the IE-789835-NS-EM1.
