Simcom SIM900E GSM/GPRS module User Manual 6 SIM900E

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Document ID	2009007
Application ID	P1QWDOWkHUjY+Okq/Kf3Mw==
Document Description	SIM900E_User Manual_Rev2
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Permanent Confidential	No
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Document Type	User Manual
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Filesize	36.75kB (459348 bits)
Date Submitted	2013-07-05 00:00:00
Date Available	2013-07-07 00:00:00
Creation Date	2013-06-28 15:51:46
Producing Software	Acrobat Distiller 8.1.0 (Windows)
Document Lastmod	2013-07-04 16:38:18
Document Title	Microsoft Word - 6 User Manual_SIM900E
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Document Author:	qiuju.huang

SIM900E
Document
User Manual
1. SIM900E Description
1.1. Summarize
SIM900E designed by SIMCom is a quad-band module which supports GSM/GPRS. The baseband circuit is
based on STE and RF circuit is based on RFMD. It works at quad bands------GSM 850MHz, EGSM 900MHz,
DCS 1800MHz and PCS 1900MHz. CPU clock is based on 26MHz crystal. The main IC includes PNX4851,
RF7176 and Flash, etc.
1.2. Feature
●
●
●
●
●
●
●
●
●
●
●
Quad-band 900/1800/850/1900MHz
GPRS multi-slot class 10/8
GPRS mobile station class B
Compliant to GSM phase 2/2+
–
Class 4 (2W) at GSM 850 and EGSM 900
–
Class 1 (1W) at DCS 1800 and PCS 1900
Dimensions: 19.8*19.8*2.7mm
Weight: 2.4 g
Control via AT commands (GSM 07.07 ,07.05 and SIMCom enhanced AT Commands)
Supply voltage range 3.2V ~ 4.8V
Low power consumption
Operation temperature: -30°C ~ +80°C
69 SMT pads include
–
Interface to external SIM 3V/1.8V
–
Analog audio interface
–
RTC backup
–
Serial interface
–
LCD interface
–
Antenna pad
–
GPIO
–
ADC
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SIM900E Document
1.3. Pin Name and IO Characters
Pin No.
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
69
Pin Name
GND
SPK_P
SPK_N
GND
MIC_N
MIC_P
GND
NETLIGHT
GND
SIM_CLK
SIM_DATA
SIM_RST
SIM_VDD
STATUS
NRESET
RXD
TXD
GND
RTS
CTS
DTR
RI
DCD
GPIO11
GND
GND
GND
RF_ANT
GND
VBAT
VBAT
VBAT
GND
GND
GND
I/O
Pin No.
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
IO
IO
IO
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Pin Name
VDD_EXT
PWRKEY
ADC
GPIO12
SDA
SCL
DBG_RXD
DBG_TXD
VRTC
SIM_PRESENCE
GPIO8/KBC2
GPIO1/KBR4
GPIO9/KBC1
GPIO6/KBC4
GPIO7/KBC3
GPIO5/KBR0
GPIO4/KBR1
GPIO2/KBR3
GPIO3/KBR2
GPIO10
PWM2
PWM1
DISP _CLK
DISP _CS
DISP_DATA
DISP _D/C
GND
GND
GND
GND
GND
GND
GND
GND
I/O
IO
IO
IO
IO
IO
IO
IO
IO
IO
IO
IO
IO
IO
IO
IO
SIM900E Document
1.4. Pictures
Figure 1: Top view of SIM900E
Figure 2: Bottom view of SIM900E
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SIM900E Document
1.5. Dimension
Figure 3: Dimention
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SIM900E Document
2. Detail Block Diagram
Figure 4: Block diagram of SIM900E
3. Electrical and Reliability Characteristics
3.1. Absolute Maximum Ratings
The absolute maximum ratings stated in following table are stress ratings under non-operating conditions. Stresses
beyond any of these limits will cause permanent damage to SIM900E .
Table 1: Absolute maximum ratings
Symbol
Parameter
Min
Typ
Max
Unit
VBAT
Power supply voltage
5.5
VI*
Input voltage
-0.3
3.1
II
Input current
10
mA
IO*
Output current
10
mA
These parameters are for digital interface pins, such as keypad, GPIO, I C, UART, LCD and DEBUG.
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SIM900E Document
3.2. Digital Interface Characteristics
Table 2: Digital interface characteristics
Symbol
Parameter
Min
Typ
Max
Unit
IIH
High-level input current
-10
10
uA
IIL
Low-level input current
-10
10
uA
VIH
High-level input voltage
2.4
VIL
Low-level input voltage
0.4
VOH
High-level output voltage
2.7
VOL
Low-level output voltage
0.1
* These parameters are for digital interface pins, such as keypad, GPIO, I C, UART, LCDand DEBUG.
3.3. SIM Card Interface Characteristics
Table 3: SIM card interface characteristics
Symbol
Parameter
Min
Typ
Max
Unit
IIH
High-level input current
-10
10
uA
IIL
Low-level input current
-10
10
uA
VIH
High-level input voltage
1.4
2.4
VIL
Low-level input voltage
0.4
2.4
VOH
High-level output voltage
VOL
Low-level output voltage
1.7
2.7
0.1
0.1
Min
Typ
Max
Unit
2.75
2.9
3.00
1.65
1.80
1.95
10
3.4. SIM_VDD Characteristics
Table 4: SIM_VDD characteristics
Symbol
Parameter
VO
Output voltage
IO
Output current
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mA
SIM900E Document
3.5. VRTC Characteristics
Table 5: VRTC characteristics
Symbol
Parameter
Min
Typ
Max
Unit
VRTC-IN
VRTC input voltage
2.00
3.00
3.15
IRTC-IN
VRTC input current
uA
VRTC-OUT
VRTC output voltage
3.00
IRTC-OUT
VRTC output current
10
uA
3.6. Current Consumption (VBAT = 3.8V)
Table 6: Current consumption
Symbol
Parameter
Conditions
Value
Unit
IVRTC
VRTC current
VBAT disconnects. Backup battery is 3 V
uA
Power down mode
30
uA
Sleep mode
BS-PA-MFRMS=9
1.0
BS-PA-MFRMS=5
1.2
BS-PA-MFRMS=2
1.5
mA
GSM 850
Idle mode
EGSM 900
22
DCS 1800
mA
PCS 1900
GSM 850
EGSM 900
IVBAT
VBAT current
Voice call
DCS 1800
PCS 1900
Data mode
GPRS(1Rx,1Tx)
Data mode
GPRS(4Rx,1Tx)
GSM 850
EGSM 900
DCS 1800
PCS 1900
GSM 850
EGSM 900
-7-
PCL=5
240
PCL=12
108
PCL=19
81
PCL=0
176
PCL=7
94
PCL=15
76
PCL=5
240
PCL=12
110
PCL=19
83
PCL=0
170
PCL=7
95
PCL=15
80
PCL=5
223
PCL=12
150
PCL=19
120
mA
mA
mA
mA
SIM900E Document
DCS 1800
PCS 1900
GSM 850
EGSM 900
Data mode
GPRS(3Rx,2Tx)
IVBAT-peak
Peak current
DCS 1800
PCS 1900
PCL=0
166
PCL=7
130
PCL=15
115
PCL=5
410
PCL=12
185
PCL=19
130
PCL=0
300
PCL=7
155
PCL=15
122
During Tx burst
mA
mA
mA
3.7. Electro-Static Discharge
SIM900E is an ESD sensitive component, so more attention should be paid to the procedure of handling and
packaging. The ESD test results are shown in the following table.
Table 7: The ESD characteristics (Temperature: 25℃, Humidity: 45 %)
Pin
Contact discharge
Air discharge
VBAT
±5KV
±10KV
GND
±4KV
±10KV
RXD, TXD
±3KV
±6KV
Antenna port
±5KV
±10KV
SPK_P/ SPK_N
MIC_P/ MIC_N
±2KV
±6KV
PWRKEY
±1KV
±6KV
3.8. Recommended Operating Conditions
Table 8: Recommended operating conditions
Symbol
Parameter
Min
Typ
Max
Unit
VBAT
Power supply voltage
3.6
4.0
4.2
TOPER
Operating temperature
-40
+25
+85
℃
TSTG
Storage temperature
-45
+90
℃
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SIM900E Document
4. Radio Characteristics
4.1. Module RF Output Power
The following table shows the module conducted output power, it is followed by the 3GPP TS 05.05 technical
specification requirement.
Table 9: SIM900E GSM850 and EGSM900 conducted RF output power
GSM850 and EGSM900
PCL
Tolerance (dB) for conditions
Nominal output power (dBm)
Normal
Extreme
33
±3
±4
31
±3
±4
29
±3
±4
27
±3
±4
25
±3
±4
10
23
±3
±4
11
21
±3
±4
12
19
±3
±4
13
17
±3
±4
14
15
±3
±4
15
13
±3
±4
16
11
±5
±6
17
±5
±6
18
±5
±6
19-31
±5
±6
Table 10: SIM900E DCS1800 and PCS1900 conducted RF output power
DCS1800 and PCS1900
PCL
Nominal output power (dBm)
Tolerance (dB) for conditions
Normal
Extreme
30
±3
±4
28
±3
±4
26
±3
±4
24
±3
±4
22
±3
±4
20
±3
±4
18
±3
±4
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SIM900E Document
16
±3
±4
14
±3
±4
12
±4
±5
10
10
±4
±5
11
±4
±5
12
±4
±5
13
±4
±5
14
±5
±6
15-28
±5
±6
For the module’s output power, the followings should be noted:
At GSM850 and EGSM900 band, the module is a class 4 device, so the module’s output power should not exceed
33dBm, and at the maximum power level, the output power tolerance should not exceed +/-2dB under normal
condition and +/-2.5dB under extreme condition.
At DCS1800 and PCS1900 band, the module is a class 1 device, so the module’s output power should not exceed
30dBm, and at the maximum power level, the output power tolerance should not exceed +/-2dB under normal
condition and +/-2.5dB under extreme condition.
4.2. Module RF Receive Sensitivity
The following table shows the module’s conducted receive sensitivity, it is tested under static condition.
Table 11: SIM900E conducted RF receive sensitivity
Frequency
Receive sensitivity（Typical）
Receive sensitivity(Max)
GSM850
-109dBm
-107dBm
EGSM900
-109dBm
-107dBm
DCS1800
-109dBm
-107dBm
PCS1900
-109dBm
-107dBm
4.3. Module Operating Frequencies
The following table shows the module’s operating frequency range; it is followed by the 3GPP TS 05.05 technical
specification requirement.
Table 12: SIM900E operating frequencies
Frequency
Receive
Transmit
GSM850
869 ~ 894MHz
824 ~ 849 MHz
EGSM900
925 ~ 960MHz
880 ~ 915MHz
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SIM900E Document
DCS1800
1805 ~ 1880MHz
1710 ~ 1785MHz
PCS1900
1930 ~ 1990MHz
1850 ~ 1910MHz
5. RF Circuit Routing Constraints
5.1. General recommendations
To route the RF antenna signals, the following recommendations must be observed for PCB layout: The RF
signals must be routed using traces with a 50 characteristic impedance. Basicaly, the characteristic impedance
depends on the dielectric constant (εr) of the material used, trace width (W), trace thickness (T), and height (H)
between the trace and the reference ground plane. In order to respect this constraint, SIMCom recommends that a
MicroStrip structure be used and trace width be computed with a simulation tool (such as CITS25, shown in the
figure below)
Figure 5: CITS25 screenshot for MicroStrip design power mode diagram
The trace width should be wide enough to maintain reasonable insertion loss and manufacturing reliability.
Cutting out inner layers of ground under the trace will increase the effective substrate height; therefore, increasing
the width of the RF trace.
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SIM900E Document
‹
‹
‹
‹
‹
Figure 6: RF routing examples
Fill the area around the RF traces with ground and ground vias to connect inner ground layers
for isolation.
Cut out ground under RF signal pads to reduce stray capacitance losses.
Avoid routing RF traces with sharp corners. A smooth radius is recommended.
The ground reference plane should be a solid continuous plane under the trace.
The coplanar clearance (G, below) from the trace to the ground should be at least the trace width (W) and at
least twice the height (H). This reduces the parasitic capacitance, which potentially alters the trace impedance
and increases the losses. Note the figure below shows several internal ground layers cutout, which may not
be necessary for every application.
Figure 7: Coplanar clearance example
6. Regulatory Information
Important notice
Because of the nature of wireless communications, transmission and reception of data can never be guaranteed.
Data may be delayed, corrupted (i.e., have errors) or be total y lost.
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SIM900E Document
Although significant delays or losses of data are rare when wireless devices such as the SIMCom modem are used
in a normal manner with a well-constructed network, the SIMCom modem should not be used in situations where
failure to transmit or receive data could result in damage of any kind to the user or any other party, including but
not limited to personal injury, death, or loss of property. SIMCom and its affiliates accept no responsibility for
damages of any kind resulting from delays or errors in data transmitted or received using SIMCom modem, or for
failure of the SIMCom modem to transmit or receive such data.
Safety caution
Marks
Requirements
When in a hospital or other health care facility, observe the restrictions about the use of mobiles.
Switch the cellular terminal or mobile off, medical equipment may be sensitive to not operate
normally for RF energy interference.
Switch off the cellular terminal or mobile before boarding an aircraft. Make sure it is switched off.
The operation of wireless appliances in an aircraft is forbidden to prevent interference with
communication systems. Forget to think much of these instructions may lead to the flight safety or
offend against local legal action, or both.
Do not operate the cellular terminal or mobile in the presence of flammable gases or fumes. Switch
off the cellular terminal when you are near petrol stations, fuel depots, chemical plants or where
blasting operations are in progress. Operation of any electrical equipment in potentially explosive
atmospheres can constitute a safety hazard.
Your cellular terminal or mobile receives and transmits radio frequency energy while switched on.
RF interference can occur if it is used close to TV sets, radios, computers or other electric
equipment.
Road safety comes first! Do not use a hand-held cellular terminal or mobile when driving a
vehicle, unless it is securely mounted in a holder for hands free operation. Before making a call
with a hand-held terminal or mobile, park the vehicle.
GSM cellular terminals or mobiles operate over radio frequency signals and cellular networks and
cannot be guaranteed to connect in all conditions, for example no mobile fee or a invalid SIM card.
While you are in this condition and need emergent help, please remember using emergency calls.
In order to make or receive calls, the cellular terminal or mobile must be switched on and in a
service area with adequate cellular signal strength.
Some networks do not allow for emergency call if certain network services or phone features are in
use (e.g. lock functions, fixed dialing etc.). You may have to deactivate those features before you
can make an emergency call.
Also, some networks require that a valid SIM card be properly inserted in the cellular terminal or
mobile.
Important Compliance Information for USA OEM Integrators
The SIM900E modem is granted with a modular approval for mobile applications. Integrators may use the
SIM900E modem in their final products without additional FCC (Industry Canada) certification if they meet the
following conditions. Otherwise, additional FCC approvals must be obtained.
1. At least 20cm separation distance between the antenna and the user’s body must be maintained at all times.
2. To comply with FCC/IC regulations limiting both maximum RF output power and human exposure to RF
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SIM900E Document
radiation, the maximum antenna gain including cable loss in a mobile-only exposure condition must not exceed
4.5dBi for GSM850 band and 2.5dBi for GSM PCS band.
3. SIM900E modem and the antenna must not be co-located or operating in conjunction with any other
transmitter or antenna within a host device.
4. A label must be affixed to the outside of the end product into which the SIM900E modem is incorporated,
with a statement similar to the following:
a. For SIM900E: This device contains FCC ID: UDV-SIM900E
A user manual with the end product must clearly indicate the operating requirements and conditions that must be
observed to ensure compliance with current FCC RF exposure guidelines. The end product with an embedded
SIM900E modem may also need to pass the FCC Part 15 unintentional emission testing requirements and be
properly authorized.
Note: If this module is intended for use in a portable device, you are responsible for separate approval to satisfy
the SAR requirements of FCC Part 2.1093
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