CHAPTER 2 NAMES AND FUNCTIONS OF COMPONENTS
User’s Manual U14481EJ3V0UM
29
2.4 Power Supply Settings
The power supply (V
DD
) is set by using JP2.
2.4.1 JP2 setting when emulator operates as stand-alone unit
When JP2 is set as shown in Figure 2-6, the IE-703107-MC-EM1 detects the power on the target system side and
automatically selects whether V
DD
is supplied from the internal power supply of the emulator or from the target system
(with the default settings).
Caution
If the JP2 setting is incorrect, the emulator may be damaged.
Figure 2-6. Setting of JP2 (for Automatic Selection of Power)
1
2
3
4
JP2
Note
Set to 1-2 shorted, 3-4 open
3
4
Note
A relay is used for power selection. Depending on the combination with the target system, the relay
repeatedly turns ON/OFF when the power to the target system is turned OFF, issuing a sound continuously.
In this case, make the setting shown in Figure 2-7.
Caution
If the JP2 setting is incorrect, the emulator may be damaged.
Figure 2-7. Setting of JP2 (to Use Power from Target System)
1
2
3
4
JP2
Set to 1-2 open, 3-4 shorted
Figure 2-7 shows the setting of JP2 to supply power from the target system to V
DD
.
With this setting, however, note that the emulator does not operate when the target system is not connected.
