User's Manual

SARA-R4 series - System Integration Manual
UBX-16029218 - R03 Appendix
Page 88 of 94
SARA-G3
SARA-R4
Pin No
Pin Name
Description
Pin Name
Description
Remarks for migration
28
RXD_AUX
Aux UART Data Out
1.8 V
USB_D-
USB Data I/O (D-)
High-Speed USB 2.0
USB instead of Auxiliary
UART on SARA-R4 series
29
TXD_AUX
Aux UART Data In
1.8 V
USB_D+
USB Data I/O (D+)
High-Speed USB 2.0
USB instead of Auxiliary
UART on SARA-R4 series
30
GND
Ground
GND
Ground
31
RSVD / EXT32K
Reserved / 32 kHz Input
RSVD
Reserved
No functional difference
32
GND
Ground
GND
Ground
33
RSVD
Reserved, to be connected to GND
RSVD
Reserved, can be connected to GND
No functional difference
34
I2S_WA / RSVD
I
2
S Word Alignment / Reserved
1.8 V
RSVD
Reserved
Reserved on SARA-R4 series
modules
35
I2S_TXD / RSVD
I
2
S Data Output / Reserved
1.8 V
RSVD
Reserved
Reserved on SARA-R4 series
modules
36
I2S_CLK / RSVD
I
2
S Clock / Reserved
1.8 V
RSVD
Reserved
Reserved on SARA-R4 series
modules
37
I2S_RXD / RSVD
I
2
S Data Input / Reserved
1.8 V
RSVD
Reserved
Reserved on SARA-R4 series
modules
38
SIM_CLK
SIM Clock Output
SIM_CLK
SIM Clock Output
No functional difference
39
SIM_IO
SIM Data I/O
SIM_IO
SIM Data I/O
No functional difference
40
SIM_RST
SIM Reset Output
SIM_RST
SIM Reset Output
No functional difference
41
VSIM
SIM Supply Output
VSIM
SIM Supply Output
No functional difference
42
SIM_DET
SIM Detection Input
1.8 V
GPIO5
SIM Detection Input
1.8 V
No functional difference
43
GND
Ground
GND
Ground
44
SPK_P / RSVD
Analog Audio Out (+) / Reserved
RSVD
Reserved
Reserved on SARA-R4 series
modules
45
SPK_N / RSVD
Analog Audio Out (-) / Reserved
RSVD
Reserved
Reserved on SARA-R4 series
modules
46
MIC_BIAS / RSVD
Microphone Supply Out / Reserved
RSVD
Reserved
Reserved on SARA-R4 series
modules
47
MIC_GND / RSVD
Microphone Ground / Reserved
RSVD
Reserved
Reserved on SARA-R4 series
modules
48
MIC_N / RSVD
Analog Audio In (-) / Reserved
RSVD
Reserved
Reserved on SARA-R4 series
modules
49
MIC_P / RSVD
Analog Audio In (+) / Reserved
RSVD
Reserved
Reserved on SARA-R4 series
modules
50
GND
Ground
GND
Ground
51-53
VCC
Module Supply Input
Normal op. range:
3.35 V – 4.5 V
Extended op. range:
3.00 V – 4.5 V
VCC
Module Supply Input
Normal op. range:
3.2 V – 4.2 V
Extended op. range:
3.0 V – 4.3 V
No functional difference
54-55
GND
Ground
GND
Ground
56
ANT
RF Antenna I/O
ANT
RF Antenna I/O
No functional difference
57-61
GND
Ground
GND
Ground
62
ANT_DET / RSVD
Antenna Detection Input / Reserved
ANT_DET
Antenna Detection Input
No functional difference
63-96
GND
Ground
GND
Ground
Table 31: SARA-R4 and SARA-G4 series modules pin assignment with remarks for migration
For further details regarding the characteristics, capabilities, usage or settings applicable for each interface
of the cellular modules, see the SARA-R4 series Data Sheet [1], the SARA-G3 series Data Sheet [16], the
SARA-G3 / SARA-U2 series System Integration Manual [17], the SARA-R4 series AT Commands Manual [2]
and the Nested Design Application Note [18].