Nu-Link2-Pro Debugger and Programmer
Mar. 13, 2020
Page
21
of 77
Rev 1.00
NU
-LINK
2
-P
RO
D
E
B
UG
G
E
R
a
nd
P
RO
G
RA
MM
E
R U
S
E
R
M
A
NUA
L
Ma
k
er Nu
-m
be
d
NUC
47
2
Us
er Man
ua
l
information by UART. The I
2
C connection pins are VCC33(CON6.14 and CON6.16), VSS (CON6.18
and CON6.20), SCL(CON6.3) and SDA(CON6.4). Figure 3.3-2 presents how to connect the target board
to use I
2
C function and Table 3.3-3 shows the pin corresponding to the target board.
Bridge
Micro USB
SCL
SS
TXD
RS485A
MOSI
CNAH
GPIO1
ADC
GPIO0
PWM
SDA
CLK
RXD
RS485B
MISO
CNAL
VSS(GND)
VDD33
VSS(GND)
VDD33
NuMicro® Family
Target Board
Figure 3.3-2 Bridge
Interface
Connection Diagram for I
2
C
Pin Name
Pin Number
Pin Corresponding to the Target Board
SCL
[1]
CON6.3
SCL
[2]
SDA
[1]
CON6.4
SDA
[2]
VCC33
CON6.14
VCC
[2]
VCC33
CON6.16
VCC
[2]
VSS(GND)
CON6.18
VSS(GND)
VSS(GND)
CON6.20
VSS(GND)
Note:
1. Internal 4.7 k
Ω
pull-up resistors R67 and R68 on Nu-Link2-Pro; the user can adjust them according to needs.
2. The target board power and signal only support 3.3 V at Nu-Link2-Pro Bridge interface.
Table 3.3-3 Bridge
Interface
Pin for I
2
C