NuMaker-M256SD
May 20, 2022
Page
21
of 52
Rev 1.00
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UMA
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NUC
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er Man
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l
2. Solder the resistor on ICEJPR2 (ICEVCC) depending on the ICE chip operating voltage.
3. Switch the SW2 to OFF.
4. Connect the external power supply to ICEJ3.
Table 3-12 presents all power models when supplying external power through Nu-Link2-Me. The Nu-
Link2-Me external power sources are highlighted in yellow.
Model
Target
Chip
Voltage
ICEJ3
ICEJPR1
(MCUVCC)
Selection
[1]
ICEJPR2
(ICEVCC)
Selection
[2]
ICE
Chip
Voltage
SW2
Selection
J2
Vin
JP1
1
1.8 V
Connect
to PC
1.8 V
1.8 V
1.8 V
Off
-
-
1.8 V
output
2
3.3 V
Connect
to PC
3.3 V (default)
3.3 V
(default)
3.3 V
Off
-
-
3.3 V
output
3
5 V
Connect
to PC
5 V
3.3 V
(default)
3.3 V
Off
-
-
5 V
output
Note
:
1. 0
Ω should be soldered between ICEJPR1’s MCUVCC and 1.8 V / 3.3 V / 5 V.
2. 0
Ω should be soldered between ICEJPR2’s ICEVCC and 1.8 V / 3.3 V.
3. -: Unused.
Table 3-12 Supply External Power through Nu-Link2-Me
External Power Supply through M256SD Target Board to Target Chip
The external power supply sources on M256SD target board are shown in Figure 3-6.
USB Power Connector (J2)
NU1 pin8 (Vin)
External V
DD
Connector (JP1)
External V
SS
Connector (JP2)
Figure 3-6 External Power Supply Sources on M256SD Target Board
To use Vin or J2 as external power supply source, please follow the steps below:
1. Switch the SW2 depending on the target chip operating voltage.
2. Remove the resistor on ICEJPR1 (MCUVCC).
3. Solder the resistor on ICEJPR2 (ICEVCC) depending on the ICE chip operating voltage.
4. Connect the external power supply to Vin or J2.
To use JP1 as external power supply source, please follow the steps below:
Switch the SW2 to OFF.