NuMaker-M251KG
Aug.
08, 2020
Page
24
of 49
Rev 1.00
NuMa
k
er
-M
25
1
K
G
U
S
E
R
MA
NU
A
L
Ma
k
er Nu
-m
be
d
NUC
47
2
Us
er Man
ua
l
USB Power Connector
(J2)
NU1 pin8 (Vin)
External V
DD
Connector
(JP1)
External V
SS
Connector
(JP2)
Separate Nu-Link2-Me
"
"
Figure 3-7 Separate the Nu-Link2-Me from NuMaker-M251KG
Table 3-12 presents all power models when supplies external power through M251 platform. The
M251 platform external power sources are highlighted in yellow.
Model
Target Chip
Voltage
Vin
[1]
J2
ICEJ3
SW2
Selection
JP1
[2]
ICEJPR1
(MCUVCC)
Selection
[3]
ICEJPR2
(ICEVCC)
Selection
[4]
ICE Chip
Voltage
[5]
3
3.3 V
7 V ~ 12 V
Input
X
X
NU1
3VCC
3.3 V output
Remove
resistor
3.3 V
3.3 V
4
3.3 V
X
Connect
to PC
X
NU1
3VCC
3.3 V output
Remove
resistor
3.3 V
3.3 V
5
1.8 V ~ 3.6 V
X
X
Connect to
PC
OFF
DC Input
1.8 V ~ 3.6 V
Remove
resistor
1.8 V / 3.3 V 1.8 V / 3.3 V
6
1.8 V ~ 3.6 V
X
X
Nu-Link2-Me
removed
OFF
DC Input
1.8 V ~ 3.6 V
X
X
X
X: Unused.
Note
:
1.
The Vin input voltage will be converted by voltage regulator UP2 to 5 V. Supply external power to Vin or J2 can
provide 5 V to NU1 pin5 (5V) and 3.3 V to NU1 pin4 (3VCC).
2.
JP1 external power input only provides voltage to target chip.
3.
0Ω should be removed from ICEJPR1’s MCUVCC and 1.8 V / 3.3 V / 5 V.
4.
0Ω should be soldered between ICEJPR2’s ICEVCC and 1.8 V / 3.3 V.
5.
The ICE chip voltage should be close to the target chip voltage.
6.
X: Unused
Table 3-12 Supply External Power for M251 platform
