EVK-N2 - User guide
UBX-17005115 - R05
Starting up
Page 5 of 18
1.2
EVK-N2 block diagram
shows the main interfaces and internal connections of the EVK-N2 evaluation kit:
SIM
card holder
(J300)
Reset
(SW303)
Power-on
(SW302)
ADP-N2
SARA-N2
module
42
-p
in
D
IL
B
oa
rd
-to
-B
oa
rd
C
on
nec
to
r
(J
10
1)
42
-p
in
D
IL
B
oa
rd
-to
-B
oa
rd
C
on
nec
to
r
(J
10
4)
EVB-WL3
GNSS
module
GNSS Adapter Board
RF
USB
UART / UART AUX
converter
Cellular USB
(UART / UART AUX)
(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
(J102)
Step - Down
Main power switch
(SW400)
12 V
(J400)
3.8 V
VCC jumper
(J404)
LDO
UART AUX
UART AUX switch
(SW510)
VCC jumper
(J103)
1.8V / VCC
Level Translator
SARA-N2 Adapter Board
ADP-GNSS
Figure 2: Block diagram of EVK-N2 for SARA-N2 series modules
The EVK-N2 evaluation kit is formed by three boards:
The lower one, called EVB-WL3, contains the power supply and other peripherals for the SARA-N2
module (e.g. SIM card holder and Reset button).
The cellular adapter board, called ADP-N2, contains the SARA-N2 module, the cellular antenna
connector and the DIL connectors (J101 and J104).
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-N2 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 J104), which are pin-to-pin compatible to the
connectors on the bottom layer of the adapter board EVB-WL3.
Communication with the SARA-N2 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-N2 module is routed up to both 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 secondary / auxiliary UART interface of the SARA-N2
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 are 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.
