SimCom SIM7000 User Manual

Smart Machine Smart Decision
SIM7000 _Hardware Design _V1.04 2018-1-31
C103
C102
C104
C101
VBAT
VBAT
Power supply
100uF
100uF
100uF
1uF
55
56
57
58
GND
GND
2
GND
GND
0R
C107
C106
RF Antenna
NC
NC
RF_ANT
60
62
GND
GND
61
C108
GNSS Antenna
33pF
GNSS_ ANT
53
54
GND
NC
L101
NC
L102
GND
63
18
GND
GND
17
29
39
GND
GND
46
GND
GND
45
64
SIM7000
R101
GND
65
VBAT
GND
59
TVS
USB_VBUS
24
28
USB_DP
27
USB_ DN
USB_VBUS
USB_DN
USB_DP
VDD_EXT
I2C_ SCL
I2C_ SCL
38
I2C_ SDA
I2C_ SDA
37
ADC
ADC
25
2.2 KR
R115
R114
31
C109
220nF
USIM_VDD
USIM_ RST
USIM_ CLK
USIM_ DATA
SIM
_
DATA
SIM
_
VDD
SIM
_
RST
SIM
_
CLK
32
33
30
TVS
USIM_DET
34
49
GPIO2
50
68
67
GPIO3
POWERKEY
1
4.7K
47K
R102
R103
NRESET
16
4.7K
47K
R105
R106
TXD
RXD
CTS
RTS
RI
DCD
DTR
UART_TXD
UART_ RXD
UART_CTS
UART_RTS
UART_RI
UART_ DCD
UART_DTR
9
10
7
8
4
5
3
23
6
Test Point
BOOT_ CFG
Test Point
MDM_ LOG_TX
19
20
21
NC
22
26
35
36
40
41
42
43
44
47
51
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
VDD_EXT
VDD_ EXT
15
Test Point
11
13
12
14
PCM_DIN
PCM_DOUT
PCM_SYNC
PCM_CLK
Audio CODEC
or
DSP
GPIO4
48
Power supply
STATUS
47K
4.7K
510R
LED
66
R111
R110
R112
VBAT
Power supply
NETLIGHT
47K
4.7K
510R
LED
52
R109
R108
R107
VBAT
2.2 KR
GPIO0/UART3_TXD
GPIO1/UART3_RXD
Turn on
/
off impulse
Turn on
/
off impulse
LXES15AAA1-153
ESDA6V1W5
Input range: 0.1~1.7V
LDO Output: 1.8V
Figure 28: Passive antenna circuit (Default)
In above figures, the components C1, L1 and L2 are used for antenna matching. Usually, the values
of the components can only be achieved after antenna tuning and usually provided by antenna
vendor. C2 is used for DC blocking. L3 is the matching component of the external LNA, and the
value of L3 is determined by the LNA characteristic and PCB layout. Both VDD of active antenna
and V_LNA need external power supplies which should be considered according to active antenna
and LNA characteristic. LDO/DCDC is recommended to get lower current consuming by shutting
down active antennas and LNA when GNSS is not working.
GNSS can be tested by NMEA port. NMEA sentences can be obtained through UART or USB
automatically. NMEA sentences include GSV, GGA, RMC, GSA, and VTG. Before using GNSS,
user should configure SIM7000 in proper operating mode by AT command. Please refer to related
documents for details. SIM7000 can also get position location information through AT directly.
Note:
1. GNSS is closed by default and can be started by “AT+CGNSPWR=1”. The AT command has
two parameters, the first is on/off, and the second is GNSS mode. Default mode is standalone
mode.
AGPS mode needs more support from the mobile telecommunication network. Please refer to
document [21] for more details.
2. If the passive antenna is used, put the LNA close to the antenna.
3. Make sure there are no noise signals around GNSS antenna.
SIMCOM CONFIDENTIAL FILE

SimCom SIM7000 Specifications

General

Brand	SimCom
Model	SIM7000
Category	GSM/GPRS Modules
Language	English