Table of Contents
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6
D
C
[2] AP_READY
[2] W_DISABLE#
[8] NET_MODE
[8] NET_STATUS
[2,4,5,7] VDD_EXT
[4] USIM_GND
[8] DBG_RXD
[8] DBG_TXD
[4] USIM_VDD
[4] USIM_DATA
[4] USIM_CLK
[4] USIM_RST
B
Notes:
1. Keep all RESERVED and unused pins unconnected.
A
2. Pin 73~84 and 117~140 are unused in the design. You can ignore them in schematic and PCB decal.
3. The DBG_RXD/DBG_TXD, CTS/RTS/DCD and SD functions are not supported on EC20-E currently.
6
5
[2,8] USB_DP
[2,8] USB_DM
[2,8] USB_VBUS
1
WAKEUP_IN
2
AP_READY
3
RESERVED
4
W_DISABLE#
5
NET_MODE
6
NET_STATUS
7
VDD_EXT
8
U101-A
GND
9
GND
10
USIM_GND
11
DBG_RXD
12
DBG_TXD
13
RESERVED
14
USIM_VDD
15
USIM_DATA
16
USIM_CLK
17
USIM_RST
18
RESERVED
5
4
4
3
Module Interface
54
GND
53
GND
52
GND
51
GND
50
GND
49
ANT_MAIN
ANT_MAIN
48
GND
47
ANT_GNSS
ANT_GNSS
46
GND
45
ADC0
44
ADC1
43
RESERVED
42
I2C_SDA
I2C_SDA
41
I2C_SCL
I2C_SCL
40
RESERVED
39
RESERVED
38
RESERVED
37
RESERVED
3
2
85
GND
86
GND
87
GND
88
GND
89
GND
90
GND
91
GND
92
GND
93
GND
94
GND
95
[6]
GND
96
GND
97
GND
98
GND
99
[6]
GND
100
GND
101
U101-B
GND
102
GND
103
GND
104
[5]
GND
105
[5]
GND
106
GND
107
GND
108
GND
109
GND
110
GND
111
GND
112
GND
Quectel Wireless Solutions
DRAWN BY
Mountain.ZHOU
EC20 Reference Design
CHECKED BY
Radom.XIANG
SHEET
2
1
D
C
B
A
PROJECT
TITLE
Module Interface
SIZE
VER
A2
1.0
1
OF
8
DATE
2015/3/30
1
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Table of Contents
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- Page 6 2. If you design the antenna circuit with passive antenna, the R603 and L603 are not needed. J603 L603 Active Antenna / 47nH Passive Antenna C606 100pF ANT_GNSS C608 D601 C607 LXES15AAA1-117 Quectel Wireless Solutions PROJECT TITLE DRAWN BY Mountain.ZHOU EC20 Reference Design RF and GNSS Design SIZE CHECKED BY Radom.XIANG SHEET DATE 2015/3/30...
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