SARA-N2 series - System Integration Manual
UBX-17005143 - R06
Appendix
Page 78 of 82
A.3
Schematic for SARA-G3 /-U2 /-R4 /-N2 modules integration
shows an example of schematic diagram where a SARA-G3, SARA-U2, SARA-R4 or
SARA-N2 series module can be integrated into the same application board, using all the available
interfaces and functions of the modules. The different mounting options for the external parts are
highlighted in different colors as described in the legend, according to the interfaces supported by the
relative modules.
TXD
RXD
RTS
CTS
RI
DCD
DTR
DSR
GND
GND
3.6V UART DTE
3.6V UART DTE
Application
Processor
Open
Drain
Output
Open
Drain
Output
TXD
RXD
VBUS
D+
D-
GND
USB 2.0 Host
12
TXD
7
RI / RSVD
13
RXD
10
RTS
11
CTS
8
DCD / RSVD
9
DTR / RSVD
6
DSR / RSVD
GND
3V6
GND
330
µ
F
10nF
100nF
56pF
SARA-G3 / SARA-U2 / SARA-R4 / SARA-N2
52
VCC
53
VCC
51
VCC
+
100
µ
F
2
V_BCKP / RSVD
GND
GND
RTC
back-up
18
RESET_N
15
PWR_ON / RSVD
100k
29
TXD_AUX / USB_D+ / RSVD
28
RXD_AUX / USB_D- / RSVD
TP
TP
15pF
33
RSVD
V_BCKP
TP
TP
17
RSVD / VUSB_DET
GND
0
Ω
0
Ω
0
Ω
or
Ferrite Bead
0
Ω
0
Ω
TP
TP
TP
+
0
Ω
TP
TP
47pF
SIM Card
Connector
CCVCC (C1)
CCVPP
(C6)
CCIO (C7)
CCCLK
(C3)
CCRST
(C2)
GND (C5)
47pF 47pF
100n
F
41
VSIM
39
SIM_IO
38
SIM_CLK
40
SIM_RST
47pF
SW1
SW2
4
V_INT
42
RSVD / SIM_DET / GPIO5
470k
ESD ESD ESD ESD ESD ESD
56
ANT
62
ANT_DET
10k
68nH
33pF
Connector
27pF
ESD
External
Antenna
1k
TP
u-blox 1.8V
GNSS Receiver
4.7
k
OUT
IN
GND
LDO Regulator
SHDN
RSVD / SDA
RSVD / SCL
4.7
k
3V6
1V8_GPS
SDA2
SCL2
32K_OUT / GPIO3 / GPIO2
RSVD /
GPIO4
TxD1
EXTINT0
26
27
24
25
47k
VCC
RSVD / GPIO2
23
V_INT
0
Ω
for SARA-G300 /-G310
15pF
39nH
0
Ω
TP
V_INT
B1
A1
VCCB
VCCA
Voltage Translator
SN74AVC2T245
3V6
B2
A2
V_INT
B1
A1
VCCB
VCCA
Voltage Translator
SN74AVC2T245
3V6
B2
A2
V_INT
BCLK
LRCLK
10
µ
F
1
µ
F
Audio Codec
MAX9860
SDIN
SDOUT
SDA
SCL
36
RSVD / I2S_CLK
34
RSVD / I2S_WA
35
RSVD / I2S_TXD
37
RSVD / I2S_RXD
19
RSVD / CODEC_CLK / GPIO6
MCLK
IRQn
10k
100nF
VDD
Speaker
OUTP
OUTN
Microphone
MICBIAS
1
µ
F
2.2k
1
µ
F
1
µ
F
MICLN
MICLP
MICGND
2.2k
ESD ESD
V_INT
10nF
10nF
EMI
EMI
27pF
27pF
10nF
EMI
EMI
ESD ESD
27pF
27pF
10nF
31
EXT32K / RSVD
0
Ω
49
RSVD / MIC_P
2.2k
2.2k
2.2k
48
RSVD / MIC_N
2.2k
10uF
46
RSVD / MIC_BIAS
47
RSVD / MIC_GND
100nF
100nF
44
RSVD / SPK_P
45
RSVD / SPK_N
Mount for SARA-G300 /-G310
Mount for SARA-G340 /-G350
Mount for SARA-U2
Mount for SARA-G3
Mount for SARA-G340 /-G350 /-U2
Mount for SARA-G3 /-U2 /-R4 /-N2
LEGEND
TP
TP
TP
TP
Mount for SARA-G3 /-U2
Mount for SARA-G3 /-U2 /-R4
Mount for SARA-N2
Mount for SARA-G340 /-G350 /-U2 /-R4
0
Ω
V_INT
B1
A1
VCCB
VCCA
Voltage Translator
SN74AVC2T245
3V6
B2
A2
V_INT
B1
A1
VCCB
VCCA
Voltage Translator
SN74AVC2T245
3V6
B2
A2
V_INT
B1
A1
VCCB
VCCA
Voltage Translator
SN74AVC2T245
3V6
B2
A2
0
Ω
16
RSVD / GPIO1
3V6
Network
Indicator
TP
Mount for SARA-G340 /-G350 /-U2 /-R4 /-N2
Mount for SARA-U2 /-R4
CTS
Figure 38: Example of complete schematic diagram to integrate SARA-G3 /-U2 /-R4 /-N2 modules on the same application
board
