1.0
EG21-G
TITLE
PROJECT
Reference Design
A2
2019/12/5
DATE
3
14
VER
SIZE
Quectel Wireless Solutions
B
C
D
6
5
4
3
2
1
D
C
B
A
SHEET
1
2
3
4
5
6
A
OF
DRAWN BY
CHECKED BY
Woody WU
Lorry XU
Module Interface
1. Keep all RESERVED and unused pins unconnected, and ensure all GND pins are connected to the ground network.
Notes:
2. Pins 73
～
84 are unused in the design, and can be ignored in schematic and PCB decal.
3. A common mode choke L0101 is recommended to be added in series between the module and customers' MCU in order to
Meanwhile, it is recommended to reserve the test points for upgrading the firmware over USB interface and minimize the
4. ADC pins cannot be directly connected to the module's power supply and the input voltage must not exceed VABT_BB.
5. C0101 and C0102 should be placed close to the SGMII interface of the module.
Note 3
Note 6
Note 4
EG21-G
EG21-G
Note 5
extra stubs of the trace. The two resistors should be placed close to the module.
suppress EMI spurious transmission, and should be placed close to the module.
6. Do not pull up pin1,pin5, pin40,pin136,pin137and pin138 unless the module starts up sucessfully.
Meanwhile, these pins should be served as a keepout area.
R0111
NM_0R
R0109
NM_0R
R0113
100K
R0114
100K
R0116
100K
R0115
100K
R0118
0R
R0120
0R
R0122
0R
R0124
0R
R0108
0R
R0104
0R
R0106
0R
R0102
0R
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 USIM_PRESENCE
14 USIM_VDD
15 USIM_DATA
16 USIM_CLK
17 USIM_RST
18 RESERVED
19
GN
D
20
RESET_N
21
PWRKEY
22
GN
D
23
SD2_INS_DET
24
PCM_IN
25
PCM_O
U
T
26
PCM_SYNC
27
PCM_CLK
28
SDC2_DATA3
29
SDC2_DATA2
30
SDC2_DATA1
31
SDC2_DATA0
32
SDC2
_CL
K
33
SDC2
_CM
D
34
VDD_SDI
O
35
ANT_DIV
36
GN
D
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
GN
D
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
GN
D
115
USB_BO
O
T
116
RESERVED
113
RESERVED
114
RESERVED
141 RESERVED
142 RESERVED
143
RESERVED
144
RESERVED
U0101-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
117
RESERVED
118
RESERVED
119
EPHY_RST_N
120
EPHY_INT_N
121
SGMII_MDATA
122
SGMII_MCLK
123
SGMII_TX_M
124
SGMII_TX_P
125
SGMII_RX_P
126
SGMII_RX_M
127
RESERVED
128
USIM2_VDD
129
RESERVED
130
RESERVED
131
RESERVED
132
RESERVED
133
RESERVED
134
RESERVED
135
RESERVED
136
RESERVED
137
RESERVED
138
RESERVED
139
RESERVED
140
RESERVED
U0101-B
C0101
100nF
C0102
100nF
1
2
3
4
L0101
DLM0NSN900HY2D
[6]
USIM_GND
[14] DBG_RXD
[14]
DBG_TXD
[6] USIM_VDD
[6]
USIM_CLK
[6] USIM_RST
[6] USIM_DATA
[4,5,6,11,13,14]
VDD_EXT
[14]
NET_STATUS
[14]
NET_MODE
[4]
W_DISABLE_EG21-G
[4]
AP_READY_EG21-G
[4]
RESET_N
[4,14]
PWRKEY
[10]
ANT_DIV
[10]
ANT_MAIN
[10]
ANT_GNSS
[4,14]
USB_VBUS
[6]
RXD_EG21-G
[6]
TXD_EG21-G
[6]
DTR_EG
21
-G
[6]
RTS_EG21-G
[6]
CTS_EG21-G
[6]
DCD_EG
21
-G
[6]
R
I_EG21-G
[14]
STATUS
[3,5,14]
VBAT
[3,5,14]
VBAT
[6] USIM_PRESENCE
[7,8]
CODEC_PCM_IN
[7,8] CODEC_PCM_OUT
[7,8] CODEC_PCM_SYNC
[7,8] CODEC_PCM_CLK
[7,8]
I2C_SDA
[14]
USB_DM_TEST
[14]
USB_DP_TEST
ADC0_INPUT
ADC1_INPUT
[7,8]
I2C_SCL
[14]
USB_BOOT
[4]
WAKEUP_IN_EG21-G
[13]
SD2_INS_DET
[13]
SD2_DATA3
[13]
SD2_DATA2
[13]
SD2_DATA1
[13]
SD2_DATA0
[13]
SD2_CLK
[13]
SD2_CMD
[13]
VDD_SDI
O
[11]
USIM2_VDD
[11]
SGMII_RX_M
[11]
SGMII_RX_P
[11]
SGMII_TX_P
[11]
SGMII_TX_M
[11]
SGMII_MDIO_CLK
[11]
SGMII_MDIO_DATA
[11]
EPHY_INT_N
[11]
EPHY_RST_N
[4]
USB_DP
[4]
USB_DM
