Quectel EC20, Схемы устройства

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TITLE PROJECT
1.0
EC20 Reference Design
Radom.XIANG
Mountain.ZHOU
CHECKED BY
DRAWN BY
OF
A
6
5
4
3 2
1
SHEET
A
B
C
D
1 2 3 4 5 6
D
C
B
Quectel Wireless Solutions
SIZE
VER
8 1 DATE
2015/3/30
A2
Module Interface
1. Keep all RESERVED and unused pins unconnected.
Notes:
2. Pin 73~84 and 117~140 are unused in the design. You can ignore them in schematic and PCB decal.
Module Interface
3. The DBG_RXD/DBG_TXD, CTS/RTS/DCD and SD functions are not supported on EC20-E currently.
1
WAKEUP_IN
2
AP_READY
3
RESERVED
4
W_DISABLE#
5
NET_MODE
6
NET_STATUS
7
VDD_EXT
8
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
19
GND
20
RESET_N
21
PWRKEY
22
GND
23
SD_INS_DET
24
PCM_IN*
25
PCM_OUT*
26
PCM_SYNC*
27
PCM_CLK*
28
SD1_DATA3
29
SD1_DATA2
30
SD1_DATA1
31
SD1_DATA0
32
SD1_CLK
33
SD1_CMD
34
VDD_SDIO
35
ANT_DIV
36
GND
37
RESERVED
38
RESERVED
39
RESERVED
40
RESERVED
41
I2C_SCL
42
I2C_SDA
43
RESERVED
44
ADC1
45
ADC0
46
GND
47
ANT_GNSS
48
GND
49
ANT_MAIN
50
GND
51
GND
52
GND
53
GND
54
GND
55
RESERVED
56
GND
57
VBAT_RF
58
VBAT_RF
59
VBAT_BB
60
VBAT_BB
61
STATUS
62
RI
63
DCD
64
CTS
65
RTS
66
DTR
67
TXD
68
RXD
69
USB_DP
70
USB_DM
71
USB_VBUS
72
GND
115
RESERVED
116
RESERVED
113
RESERVED
114
RESERVED
U101-A
85
GND
86
GND
87
GND
88
GND
89
GND
90
GND
91
GND
92
GND
93
GND
94
GND
95
GND
96
GND
97
GND
98
GND
99
GND
100
GND
101
GND
102
GND
103
GND
104
GND
105
GND
106
GND
107
GND
108
GND
109
GND
110
GND
111
GND
112
GND
U101-B
[8] NET_STATUS
[2,4,5,7] VDD_EXT
[4] USIM_VDD
[1,3,8]
VBAT
[8]
STATUS
[4]
RXD_EC20
[4]
DTR_EC20
[4]
TXD_EC20
[4]
RI_EC20
[8] NET_MODE
[2]
RESET_N
[2,8]
PWRKEY
[5]
PCM_IN
[5]
PCM_OUT
[5]
PCM_SYNC
[5]
PCM_CLK
[6]
ANT_DIV
[1,3,8]
VBAT
[2,8] USB_VBUS
[2,8] USB_DM
[2,8] USB_DP
[2] W_DISABLE#
[2] AP_READY
[4] USIM_GND
[4] USIM_CLK
[4] USIM_RST
[4] USIM_DATA
[6]
ANT_MAIN
[6]
ANT_GNSS
[5]
I2C_SDA
[5]
I2C_SCL
[8] DBG_RXD
[8] DBG_TXD
[4]
CTS_EC20
[4]
RTS_EC20
[4]
DCD_EC20
[7]
SD1_DATA3
[7]
SD1_DATA2
[7]
SD1_DATA1
[7]
SD1_DATA0
[7]
S
D1_CLK
[7]
S
D1_CMD
[7]
V
DD_SDIO
[7]
SD_INS_DET
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