
EVK-R4 - User guide
UBX-16029216 - R07
Starting up
Page 8 of 31
C1-Public
1.2
EVK-R4 block diagram
shows the main interfaces and internal connections of the evaluation kit for SARA-R410M
and SARA-R412M modules:
SIM
card holder
(J300)
Reset
(SW303)
Power-on
(SW302)
SARA-R41xM
adapter board
SARA-R41xM
Cellular
module
42
-pi
n
D
IL
B
2B
co
nn
ect
or
42
-pi
n
D
IL
B
2B
co
nn
ect
or
EVB-WL3
GNSS
module
GNSS adapter board
RF_IN
USB
UART
converter
Cellular USB
(UART)
(J501)
Cellular RS232
(UART)
(J500)
RS232
UART
converter
UART
MiniUSB/DB9
switch
(SW403)
On-Board/B2B
switch
(SW401)
USB
I
2
C
Step - Down
Main power switch
(SW400)
12 V
(J400)
3.8 V
VCC jumper
(J404)
LDO
GPIO2/3/4
GNSS switch
(SW304)
ANT
Native
USB
Figure 4: Block diagram of the evaluation kit for SARA-R410M and SARA-R412M modules
shows the main interfaces and internal connections of the evaluation kit for SARA-R422M8S
modules:
SIM
card holder
(J300)
Power-ctrl
(SW302)
SARA-R422M8S
adapter board
SARA-R422M8S
module
42
-p
in
D
IL
B
2B
c
on
ne
ctor
(J
30
0)
42
-p
in
D
IL
B
2B
c
on
ne
ctor
(J
30
1)
EVB-WL3
GNSS
module
GNSS adapter board
RF_IN
USB
UART
converter
Cellular USB
(Main UART + TXD_GNSS)
(J501)
Cellular RS232
(Main UART)
(J500)
RS232
UART
converter
UART
TXD_GNSS
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)
TXD_GNSS
Figure 5: Block diagram of the evaluation kit for SARA-R422M8S modules
The EVK-R4 is formed by three boards:
1.
The lower one, called EVB-WL3, contains the power supply and other peripherals for the SARA-R4
series cellular module (SIM card holder, reset button and power-on / power-ctrl button).
2.
The cellular adapter board, called ADP-R4, contains the SARA-R4 cellular module, antenna
connectors for the cellular RF interface and the GNSS RF interface
1
of the SARA-R4 module, USB
connectors for the two UART interfaces
1
and the USB interface of the SARA-R4 module, and the
DIL header connectors (J300 and J301) making accessible interfaces of the SARA-R4 module.
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.
1
EVK-R422M8S only.