EVK-G45 - User Guide
UBX-18058360 - R01
Starting up
Page 5 of 21
1.2
EVK-G45 block diagram
Figure 2
shows the main interfaces and internal connections of the EVK-G45 evaluation kit:
SIM
card holder
(J300)
Power-off
(SW303)
Power-on
(SW302)
Cellular adapter board
SARA-G450
module
42
-p
in
D
IL
B
2B
co
nn
ecto
r
(J
0
40
4)
42
-p
in
D
IL
B
2B
c
on
ne
ct
or
(
J04
03
)
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
Cellular antenna
(J0501)
Step - Down
Main power switch
(SW400)
12 V
(J400)
3.8 V
VCC jumper
(J404)
LDO
GPIO2/3/4
GNSS switch
(SW304)
UART FT
UART FT switch
(SW510)
Cellular USB
(UART AUX)
(J0600)
Header connector
(J0601)
USB
UART AUX
converter
GDI voltage
selection switch
(J0201)
Figure 2: Block diagram of EVK-G45
The EVK-G45 is formed by three boards:
The lower one, called EVB-WL3, contains the power supply and other peripherals for the
SARA-G450 cellular module (as SIM card holder, headset jack, power-off button and power-on
button).
The cellular adapter board, called ADP-G450, contains the SARA-G450 cellular module, the cellular
antenna connector, a switch for the digital I/O interfaces (GDI) voltage selection, and a USB
connector for the UART AUX interface.
The GNSS adapter board, called ADP-GNSS, contains the u-blox GNSS module, the LDO supply
regulator, 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 board and their corresponding female connectors provided on top of the lower
board.
The cellular module’s interfaces are available on the dual in-line male board-to-board connectors
provided on the top layer of the cellular adapter board (J0403 / J0404), which are pin-to-pin
compatible to the connectors on the bottom layer of the adapter board.
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 only partially described in
Figure 1
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 to leave any additional switch
in its default configuration.
