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3.6 LCD Emulation
(1) LCD emulation
Using the LCD emulation circuit, the VLC and CAP signals can be switched to the IE system side or target
system side through switch activation, and an external boost circuit can also be used. The circuit configuration
shown in Figure 3-18 is used on the IE system side.
Target system
V
to V
LC0
LC4
CAP0 to CAP3
External boost circuit
5 V
CP57 (check pin)
VLC3
10 kΩ
VR1
(10 kΩ)
4.7 kΩ
IE system
V
to V
LC0
LC4
Connect to GND via a capacitor (0.1
CAP0 to CAP3
Connect CAP0 to CAP1, CAP1 to CAP2, and
CAP2 to CAP3 with a capacitor (0.1
Switch (Signal Name)
SW3 (V
, V
)
LC0
LC1
SW4 (V
, V
)
LC2
LC3
SW2 (V
)
LC4
SW5 (CAP0, CAP1)
SW6 (CAP2, CAP3)
34
CHAPTER 3
INSTALLATION
Figure 3-18. LCD Emulation Circuit
SW1
µ
F).
µ
F).
Table 3-6. LCD Switch Settings
Setting
ICE side (initial setting)
USR side
ICE side (initial setting)
USR side
ICE side (initial setting)
USR side
ICE side (initial setting)
USR side
ICE side (initial setting)
USR side
User's Manual U16290EJ1V0UM
SW3
SW4
SW2
ZD
SW5
SW6
Description
Connects IE system's internal circuit.
Connects to target system via emulation probe.
Connects IE system's internal circuit.
Connects to target system via emulation probe.
Connects IE system's internal circuit.
Connects to target system via emulation probe.
Connects IE system's internal circuit.
Connects to target system via emulation probe.
Connects IE system's internal circuit.
Connects to target system via emulation probe.
I/O EVA chip
V
LC0
V
LC1
V
LC2
V
LC3
V
LC4
CAP0
CAP1
CAP2
CAP3
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