EVK-N3 - User guide
UBX-19004195 - R06
Starting up
Page 5 of 17
C1-Public
1.2
EVK-N3 block diagram
shows the main interfaces and internal connections of the EVK-N3 evaluation kit:
SIM
card holder
(J300)
Reset
(SW303)
Power-on
(SW302)
ADP-N3
SARA-N3
module
42
-pi
n
D
IL
B
oar
d-
to
-B
oar
d
co
nne
ct
or
(J
10
1)
42
-pi
n
D
IL
B
oar
d-
to
-B
oar
d
co
nne
ct
or
(J
10
2)
EVB-WL3
GNSS
module
GNSS adapter board
RF
USB
UART / UART FT
converter
Cellular USB
(UART / UART FT)
(J501)
Cellular RS232
(UART)
(J500)
RS232
UART
converter
UART
MiniUSB/DB9
switch
(SW403)
On-board/B2B
switch
(SW401)
USB
Headset jack
(J303)
I
2
C
ANT NB
(J106)
Step - Down
Main power switch
(SW400)
12 V
(J400)
3.8 V
VCC jumper
(J404)
LDO
UART FT
UART FT switch
(SW510)
SARA-N3 adapter board
ADP-GNSS
GPIO2/3/4
GNSS switch
(SW304)
GDI voltage
selection jumper
(J105)
VCC jumper
(J155)
Figure 2: Block diagram of EVK-N3 for SARA-N3 series modules
The EVK-N3 evaluation kit is formed by three boards:
•
The lower one, called EVB-WL3, contains the power supply and other peripherals for the SARA-N3
series cellular module (such as SIM card holder, reset button and power-on button).
•
The cellular adapter board, called ADP-N3, contains the SARA-N3 cellular module, the cellular
antenna connector, a 3-pin header with jumper for the digital I/O interfaces (GDI) voltage selection,
a 2-pin header with jumper for VCC and current consumption measurement, and the DIL
connectors (J101 and J102).
•
The GNSS adapter board, called ADP-GNSS, contains the u-blox GNSS module, the GNSS antenna
connector and the USB connector for the GNSS module.
The boards are connected by means of male header board-to-board connectors provided on the
bottom of the adapter boards and their corresponding female connectors provided on top of the lower
board.
The SARA-N3 series pins are available on the dual in-line male board-to-board connectors provided on
the top layer of the cellular adapter board (J101 and J102), which are pin-to-pin compatible to the
connectors on the bottom layer of the adapter board EVB-WL3.
Communication with the SARA-N3 series cellular module is provided through the Cellular RS232 DB9
connector (J500) or the Cellular USB Mini-USB connector (J501), available on the EVB-WL3 board.
The UART interface of the SARA-N3 series cellular module is routed up to both the connectors - J500
and J501. The Mini-USB / DB9 slide switch (SW403) must be set according to the selected connector.
The Cellular USB Mini-USB connector (J501) provides also access to the additional UART interface
for firmware upgrade and tracing of the SARA-N3 series cellular module (see section
The lower board (EVB-WL3) is designed also to be used with other u-blox cellular adapter boards. It
contains additional switches, jumpers, connectors, LEDs and parts that may be partially described in
or in this document, because they are intended for use only with other u-blox cellular modules.
It is recommended to leave any additional connector unconnected and any additional switch in its
default configuration.
