LARA-R2 series - System Integration Manual
UBX-16010573 - R02
Objective Specification
Appendix
Page 138 of 148
Appendix
A
Migration between SARA-U2 and LARA-R2
A.1
Overview
Migrating between u-blox SARA-U2 series 3G / 2G cellular modules and LARA-R2 series LTE Cat 1 / 2G cellular
modules is a straightforward procedure that allows customers to take maximum advantage of their hardware
and software investments.
The SARA cellular modules (26.0 x 16.0 mm, 96-pin LGA) have a different form factor than the LARA cellular
modules (26.0 x 24.0 mm, 100-pin LGA), but the footprint of SARA and LARA modules has been developed to
ensure layout compatibility as described in Figure 71, so that the modules can be alternatively mounted on the
same single common application board.
64 63
61 60
58 57
55 54
22
50
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
CTS
RTS
DCD
RI
V
_
INT
V
_
BCKP
GND
CODEC
_
CLK
RESET
_
N
GPIO1
PWR
_
ON
RXD
TXD
11
10
8
7
5
4
2
1
21
19
18
16
15
13
12
3
20
17
14
9
6
23
25 26
28 29
31 32
24
27
30
43
44
46
47
49
52
53
33
35
36
38
39
41
42
51
48
45
40
37
34
59
62
56
GND
GND
DSR
DTR
GND
VUSB
_
DET
GND
U
SB
_
D
–
U
SB
_
D+
R
SV
D
GND
G
PI
O
2
G
PI
O
3
SD
A
SC
L
G
PI
O
4
GND
GND
GND
GND
VCC
VCC
RSVD
I2S
_
TXD
I2S
_
CLK
SIM
_
CLK
SIM
_
IO
VSIM
SIM
_
DET
VCC
SIM
_
RST
I2S
_
RXD
I2S
_
WA
GND
GND
GND
GND
GND
GND
GND
GND
GND
ANT
_
D
ET
ANT
SARA-U2
Top View
Pin 65-96: GND
GND
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
64 63
61 60
58 57
55 54
22
50
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
CTS
RTS
DCD
RI
V
_
INT
V
_
BCKP
GND
GPIO6
RESET
_
N
GPIO1
PWR
_
ON
RXD
TXD
11
10
8
7
5
4
2
1
21
19
18
16
15
13
12
3
20
17
14
9
6
23
25 26
28 29
31 32
24
27
30
43
44
46
47
49
52
53
33
35
36
38
39
41
42
51
48
45
40
37
34
59
62
56
GND
GND
DSR
DTR
GND
VUSB
_
DET
GND
U
SB
_
D
–
U
SB
_
D+
R
SV
D
GND
G
PI
O
2
G
PI
O
3
SD
A
SC
L
G
PI
O
4
GND
GND
GND
GND
VCC
VCC
RSVD
I2S
_
TXD
I2S
_
CLK
SIM
_
CLK
SIM
_
IO
VSIM
GPIO5
VCC
SIM
_
RST
I2S
_
RXD
I2S
_
WA
GND
GND
GND
GND
GND
GND
GND
GND
ANT
_
D
ET
A
N
T2
A
N
T1
LARA-R2
Top View
Pin 65-96: GND
99
100
97
98
R
SV
D
R
SV
D
H
SI
C
_
ST
R
B
H
SI
C
_
D
A
TA
HOST
_
SELECT
SDIO
_
D2
SDIO
_
CMD
SDIO
_
D0
SDIO
_
D1
SDIO
_
D3
SDIO
_
CLK
Figure 71: SARA-U2 and LARA-R2 series modules pin layout and pin assignment
SARA-U2 and LARA-R2 series modules are basically pin-to-pin compatible, given that LARA-R2 series modules
provide further additional functions and interfaces, as shown in Figure 71:
Secondary antenna
SDIO interface
HSIC interface
HOST_SELECT function
