EVK-R5 - User guide
UBX-19042592 - R09
Starting up
Page 5 of 24
C1-Public
1.2
Block diagram
shows the main interfaces and internal connections of the EVK-R5 evaluation kit:
SIM
card holder
(J300)
Power-on
(SW302)
SARA-R5
adapter board
SARA-R5
module
42
-p
in
D
IL
B
2B
c
on
ne
ctor
(J
10
3)
42
-p
in
D
IL
B
2B
c
on
ne
ctor
(J
10
4)
EVB-WL3
GNSS
module
GNSS adapter board
RF_IN
USB
UART
converter
Cellular USB
(main UART)
(J501)
Cellular RS232
(main UART)
(J500)
RS232
UART
converter
UART
MiniUSB/DB9
switch
(SW403)
On-board/B2B
switch
(SW401)
USB
I2C
Step - down
Main power switch
(SW400)
12 V
(J400)
3.8 V
VCC jumper
(J404)
LDO
GPIO2/3/4
GNSS switch
(SW304)
Native
USB
(J105)
CEL
ANT
(J106)
Cellular USB
(two UARTs)
(J201)
GNSS
ANT
(J112)
USB/UART
converter
VCC jumper
(J109)
UART
(J248)
Reset
(SW303)
2-pins
header
(J107)
Figure 2: Block diagram of the EVK-R5 for SARA-R5 series modules
The EVK-R5 evaluation kit is formed by three boards:
1.
The lower one, called EVB-WL3, contains the power supply and other peripherals for the u-blox
SARA-R5 series cellular module (such as SIM card holder, reset button and power-on button).
2.
The cellular adapter board, called ADP-R5, contains the u-blox SARA-R5 cellular module and
connectors to access the cellular module interfaces. These are antenna connectors for the
cellular RF interface and the GNSS RF interface
1
of the cellular module, USB connectors for the
two UART interfaces and the USB interface of the cellular module, the DIL header connectors
(J103 and J104), and the 2-pins header connector (J107).
3.
The GNSS adapter board, called ADP-GNSS, contains the u-blox NEO-M8N GNSS module, the
GNSS antenna connector, and the USB connector for the u-blox NEO-M8N GNSS module.
The cellular and the GNSS adapter 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, called EVB-WL3.
If the on-board / B2B switch (SW401) on the EVB-WL3 board
is set to “on
-
board”
and if a jumper
socket is inserted on the pin 1 and pin 2 of the 3-pin header J248 on the cellular adapter board (see
), then the main UART interface of the cellular module, routed through the DIL header
board-to-board connectors mounted on the bottom of the cellular adapter board, can be accessed as
converted to USB interface on the USB connector (J501) on the EVB-WL3 board, or it can be accessed
as converted to RS232 interface on the RS232 DB9 connector (J500) on the EVB-WL3 board,
according to the mini-USB / DB9 switch (SW403) setting.
If the on-board / B2B switch (SW401) on the EVB-WL3 board
is set to “B2B”
and if a jumper socket is
inserted on the pin 2 and pin 3 of the 3-pin header cellular UART jumper (J248) on the adapter board
(illustrated in
), the UART interfaces of SARA-R5 series module can be accessed as USB
interfaces on the USB connector (J201) on the cellular adapter board.
If the on-board / B2B switch (SW401) on the EVB-
WL3 board is set to “B2B” and if there is no jumper
socket inserted on the 3-pin header J248 on the cellular adapter board (illustrated in
), then
the UART interface(s) of the SARA-R5 module can be accessed at 1.8 V CMOS signal levels on the DIL
header connector mounted on the top of the cellular adapter board, to communicate, for example,
with an external MCU.
1
EVK-R510M8S only.
