User's Manual

SARA-R4 series - System Integration Manual
UBX-16029218 - R03 Design-in
Page 69 of 94
2.12 Schematic for SARA-R4 series module integration
2.12.1 Schematic for SARA-R4 series modules
Figure 40 is an example of a schematic diagram where a SARA-R4 series module “00” or “01” product version is
integrated into an application board, using all the available interfaces and functions of the module.
3V8
GND
10uF 10nF
SARA-R4 series
52 VCC
53 VCC
51 VCC
68pF
SDA
SCL
26
27
RSVD
GND
18 RESET_N
Application
Processor
Open
drain
output
15 PWR_ON
Open
drain
output
TP
TP
12
TXD
13
RXD
8
DCD
10
RTS
11
CTS
9
DTR
6
DSR
7
RI
TP
TP
TXD
RXD
DCD
RTS
CTS
DTR
DSR
RI
1.8 V DTE
GND GND
USB 2.0 host
D-
D+
28
USB_D-
29
USB_D+
VBUS 17
VUSB_DET
TP
TP
GND GND
0Ω
0Ω
0Ω
0Ω
47pF
SIM Card Holder
CCVCC (C1)
CCVPP (C6)
CCIO (C7)
CCCLK (C3)
CCRST (C2)
GND (C5)
47pF 47pF 100nF
41VSIM
39SIM_IO
38SIM_CLK
40SIM_RST
47pF
SW1
SW2
4V_INT
42GPIO5
470k
ESD ESD ESD ESD ESD ESD
1k
TP
V_INT
3V8
Network
Indicator
62ANT_DET
10k
27pF
ESD
82nH
56
Connector
External
antenna
33pF
ANT
TP
0Ω
39nH
15pF
19
25
24
23
16
GPIO6
GPIO4
GPIO3
GPIO2
GPIO1
15pF100nF
Figure 40: Example of schematic diagram to integrate a SARA-R4 module using all available interfaces