Cinterion
®
ELS31-VA/ELS51-VA Hardware Interface Description
2 Interface Characteristics
56
ELS31-VA_ELS51-VA_HID_v01.000
2017-01-04
Confidential / Preliminary
Page 14 of 106
2
Interface Characteristics
ELS31-VA/ELS51-VA is equipped with an SMT application interface that connects to the exter-
nal application. The SMT application interface incorporates the various application interfaces
as well as the RF antenna interfaces.
2.1
Application Interface
2.1.1
Pad Assignment
The SMT application interface on the ELS31-VA/ELS51-VA provides connecting pads to inte-
grate the module into external applications.
shows the connecting pads’ numbering
plan, the following
lists the pads’ assignments.
Figure 3:
Numbering plan for connecting pads (bottom view)
53
65
64
63
62
61
60
59
58
57
56
55
54
66
33
21
22
23
24
25
26
27
28
29
30
31
32
20
106
92
91
98
97
96
95
94
90
89
85
86
93
74
99
87
88
84
83
79
78
77
76
75
82
81
80
72
71
70
69
68
67
105
104
103
102
101
100
73
44
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
34
35
36
38
39
40
41
42
43
45
46
47
48
49
50
51
52
Supply pads : BATT+
Control pads
GND pads
ASC0 pads
SPI pads
SIM pads
RF antenna pad
I2C pads
ADC pad
Supply pads : Other
Combined GPIO /DAI pads
Combined GPIO/Control pads
(LED, COUNTER, FST_SHDN)
Do not use
Not connected
Reserved
USB pads
Combined GPIO/ASC1/HSIC pads
Combined GPIO /
ASC0 pads
250
251
252
245
249
248
247
246
Test points , do not
use
HSIC pads
37
SDIO pads
35
GPIO pads