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2.5.8
Power Supply Models
External Power Supply through Nu-Link2-Me to Target Chip
The external power supply source on Nu-Link2-Me is shown in Figure 2-5.
Figure 2-5 External Power Supply Sources on Nu-Link2-Me
To use ICEJ3 as external power supply source with Nu-Link2-Me, please follow the below steps:
1. Solder the resistor on ICEJPR1 (MCUVCC) depends on the target chip operating voltage.
2. Solder the resistor on ICEJPR2 (ICEVCC) depends on the ICE chip operating voltage.
3. Switch the SW2 to OFF.
4. Connect the external power supply to JP1.
Table 2-10 presents all power models when supplies external power through Nu-Link2-Me. The Nu-
Link2-Me external power sources are highlighted in yellow.
Target
Model
Chip
ICEJ3
Voltage
Connect
1
1.8 V
to PC
Connect
2
3.3 V
to PC
Connect
3
5 V
to PC
X: Unused.
Note:
0 Ω should be soldered between ICEJPR1's MCUVCC and 1.8 V / 3.3 V / 5 V.
1.
0 Ω should be soldered between ICEJPR2's ICEVCC and 1.8 V / 3.3 V.
2.
Table 2-10 Supply External Power through Nu-Link2-Me
Aug.
02, 2019
ICEJPR1
ICEJPR2
(MCUVCC)
(ICEVCC)
[1]
[2]
Selection
Selection
1.8 V
1.8 V
3.3 V (default)
3.3 V (default)
5V
3.3 V (default)
Page 17 of 38
NuMaker-M252SD
ICE USB Connector
(ICEJ3)
Nu-Link2-Me
ICE
SW2
Chip
J2
Selection
Voltage
1.8 V
Off
Ignore
3.3 V
Off
Ignore
3.3 V
Off
Ignore
Vin
JP1
1.8 V
Ignore
output
3.3 V
Ignore
output
5 V
Ignore
output
Rev 1.00
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