NuMaker-M2354
Dec. 25, 2020
Page
21
of 54
Rev 1.00
N
UMA
K
E
R
-M2
35
4
US
E
R
MA
NU
A
L
Ma
k
er Nu
-m
be
d
NUC
47
2
Us
er Man
ua
l
ICEJPR1
Configures the target chip operating voltage at 1.8 V / 3.3 V / 5 V.
Note:
M2354 operating voltage range is from 1.7 V to 3.6 V. Do not
switch ICEJPR1 (MCUVCC) to 5 V.
ICEJPR2
Configures the ICE chip operating voltage at 1.8 V / 3.3 V.
SW4_PowerSelect
Configures the target chip power source from ICE or NU1_3VCC.
Table 3-10 Power Switches
3.4.8 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 3-5.
ICE USB Connector (ICEJ3)
Nu-Link2-Me
Figure 3-5 External Power Supply Sources on Nu-Link2-Me
To use ICEJ3 as external power supply source with Nu-Link2-Me, please follow the steps below:
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. Connect the external power supply to ICEJ3.
Table 3-11 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
SW4
Selection
J2
Vin
JP13
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
5V
3.3 V
(default)
3.3 V
Off
-
-
5 V
output
-
: Unused.
Note
:
