SARA-G3 and SARA-U2 series - System Integration Manual
UBX-13000995 - R26
Design-in
Page 172 of 217
2.15.2
Schematic for SARA-G340 / SARA-G350 modules integration
Figure 92 is an example of a schematic diagram where a SARA-G340 / SARA-G350 module is integrated into an
application board, using all the available interfaces and functions of the module.
TXD
RXD
RTS
CTS
DTR
DSR
RI
DCD
GND
12
TXD
9
DTR
13
RXD
10
RTS
11
CTS
6
DSR
7
RI
8
DCD
GND
3V8
GND
330µF
10nF
100nF
56pF
SARA-G340/SARA-G350
52
VCC
53
VCC
51
VCC
+
100µF
2
V_BCKP
GND
GND
GND
RTC
back-up
1.8V DTE
1.8V DTE
16
GPIO1
3V8
Network
Indicator
18
RESET_N
Application
Processor
Open
Drain
Output
15
PWR_ON
100k
Ω
Open
Drain
Output
TXD
RXD
29
TXD_AUX
28
RXD_AUX
0
Ω
0
Ω
TP
TP
u-blox 1.8 V
GNSS Receiver
4.7k
OUT
IN
GND
LDO Regulator
SHDN
SDA
SCL
4.7k
3V8
1V8_GPS
SDA2
SCL2
GPIO3
GPIO4
TxD1
EXTINT0
26
27
24
25
47k
VCC
GPIO2
23
1.8V Digital
Audio Device
I2S_RXD
I2S_CLK
I2S Data Output
I2S Clock
I2S_TXD
I2S_WA
I2S Data Input
I2S Word Alligment
37
36
35
34
49
MIC_P
2.2k
2.2k
2.2k
48
MIC_N
2.2k
10uF
46
MIC_BIAS
47
MIC_GND
100nF
100nF
44
SPK_P
45
SPK_N
82nH
82nH
27pF
27pF
Connector
Microphone
ESD
ESD
27pF 27pF
Speaker
Connector
ESD ESD
15pF
33
RSVD
31
RSVD
17
RSVD
19
RSVD
47pF
SIM Card Holder
CCVCC (C1)
CCVPP (C6)
CCIO (C7)
CCCLK (C3)
CCRST (C2)
GND (C5)
47pF 47pF
100nF
41
VSIM
39
SIM_IO
38
SIM_CLK
40
SIM_RST
47pF
SW1
SW2
4
V_INT
42
SIM_DET
470k
ESD ESD ESD ESD ESD ESD
56
ANT
62
ANT_DET
10k
82nH
33pF
Connector
27pF
ESD
External
Antenna
V_BCKP
1k
TP
TP
TP
0
Ω
0
Ω
TP
TP
0
Ω
0
Ω
TP
TP
0
Ω
TP
Figure 92: Example of schematic diagram to integrate SARA-G340/G350 module in an application board, using all the interfaces