SimTech SimCom SIM7100 Supplement

SIM7100_Hardware Design_V1.01

Smart Machine Smart Decision
Document Title SIM7100 Hardware Design
Version 1.01
Date 2015-01-20
Status Released
Document Control ID SIM7100_Hardware Design_V1.01
General Notes
SIMCom offers this information as a service to its customers, to support application and engineering
efforts that use the products designed by SIMCom. The information provided is based upon requirements
specifically provided to SIMCom by the customers. SIMCom has not undertaken any independent search
for additional relevant information, including any information that may be in the customer’s possession.
Furthermore, system validation of this product designed by SIMCom within a larger electronic system
remains the responsibility of the customer or the customer’s system integrator. All specifications supplied
herein are subject to change.
Copyright
This document contains proprietary technical information which is the property of SIMCom Limited,
copying of this document and giving it to others and the using or communication of the contents thereof,
are forbidden without express authority. Offenders are liable to the payment of damages. All rights
reserved in the event of grant of a patent or the registration of a utility model or design. All specification
supplied herein are subject to change without notice at any time.
Copyright © Shanghai SIMCom Wireless Solutions Ltd. 2015

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Contents
SIM7100_Hardware Design_V1.01............................................................................................................ 1
General Notes............................................................................................................................................... 2
Copyright ..................................................................................................................................................... 2
Copyright © Shanghai SIMCom Wireless Solutions Ltd. 2015 .................................................................. 2
Contents........................................................................................................................................................ 3
Table Index................................................................................................................................................... 6
Figure Index................................................................................................................................................. 7
Revision History .......................................................................................................................................... 8
1Introduction .......................................................................................................................................... 9
1.1Product Outline................................................................................................................................ 9
1.2Hardware Interface Overview........................................................................................................ 10
1.3Hardware Diagram..........................................................................................................................11
1.4Functional Overview.......................................................................................................................11
2Package Information.......................................................................................................................... 14
2.1Pin Configuration........................................................................................................................... 14
2.2Pin description ............................................................................................................................... 16
2.3Package Dimensions...................................................................................................................... 21
2.4Footprint Recommendation ........................................................................................................... 24
3Interface Application.......................................................................................................................... 25
3.1Power Supply................................................................................................................................. 25
3.1.1Design Guide .......................................................................................................................... 26
3.1.2Recommended Power supply circuit....................................................................................... 27
3.1.3Voltage monitor....................................................................................................................... 27
3.2Power on/Power off/Reset Time Sequence.................................................................................... 28
3.2.1Power on Sequence................................................................................................................. 28
3.2.2Power off Sequence ................................................................................................................ 29
3.2.3Reset Function ........................................................................................................................ 30
3.3UART Interface.............................................................................................................................. 31
3.3.1Design Guide .......................................................................................................................... 31
3.3.2RI Behavior............................................................................................................................. 32
3.4USB Interface ................................................................................................................................ 33
3.4.1USB Application Guide .......................................................................................................... 33
3.5USIM Interface .............................................................................................................................. 34
3.5.1USIM Application Guide ........................................................................................................ 34
3.5.2Recommend Components of USIM holder............................................................................. 35
3.6PCM Interface................................................................................................................................ 36
3.6.1PCM timing............................................................................................................................. 36
3.6.2PCM Application Guide.......................................................................................................... 38

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3.7SD Interface ................................................................................................................................... 38
3.7.1SD Design guide ..................................................................................................................... 39
3.8I2C Interface .................................................................................................................................. 39
3.8.1I2C Design Guide ................................................................................................................... 39
3.9Keypad Interface............................................................................................................................ 40
3.9.1Keypad Application Guide...................................................................................................... 40
3.10SPI Interface............................................................................................................................... 41
3.11Network status............................................................................................................................ 41
3.12Flight Mode Control................................................................................................................... 41
3.13GPIO43 Behavior....................................................................................................................... 42
3.14Pin multiplex Function ............................................................................................................... 43
3.14.1SD2 Interface....................................................................................................................... 44
3.15Other interface............................................................................................................................ 44
3.15.1Sink Current Source ............................................................................................................ 44
3.15.2ADC..................................................................................................................................... 45
3.15.3LDO..................................................................................................................................... 46
4RF Specifications ................................................................................................................................ 47
4.1GSM/WCDMA/TD-SCDMA/EVDO/LTE RF Specifications ...................................................... 47
4.2Antenna Design Guide................................................................................................................... 51
4.3GNSS (GPS and GLONASS) ........................................................................................................ 52
4.3.1GNSS Technical specification................................................................................................. 52
4.3.2GNSS Operate Mode .............................................................................................................. 53
4.3.3GNSS Application Guide........................................................................................................ 53
5Electrical Specifications..................................................................................................................... 56
5.1Absolute maximum ratings............................................................................................................ 56
5.2Operating conditions...................................................................................................................... 56
5.3Operating Mode ............................................................................................................................. 57
5.3.1Operating Mode ...................................................................................................................... 57
5.3.2Minimize Power Consumption ............................................................................................... 58
5.3.3Sleep mode.............................................................................................................................. 58
5.3.4Minimum functionality mode ................................................................................................. 58
5.4Current Consumption..................................................................................................................... 58
5.5EMC and ESD Notes ..................................................................................................................... 61
6Guide for Production.......................................................................................................................... 62
6.1Top and Bottom View of SIM7100 ............................................................................................... 62
6.2Typical Solder Reflow Profile ....................................................................................................... 62
6.3Moisture Sensitivity Level (MSL)................................................................................................. 63
6.4Stencil Foil Design Recommendation ........................................................................................... 64
Appendix.................................................................................................................................................... 65
A. Reference Design ................................................................................................................................ 65
B. Coding schemes and maximum net data rates over air interface......................................................... 66
C. Related Documents.............................................................................................................................. 69
D. Terms and Abbreviations .................................................................................................................... 71

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E. Safety Caution ..................................................................................................................................... 73
Contact us:................................................................................................................................................. 74
Shanghai SIMCom Wireless Solutions Ltd............................................................................................. 74

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Table Index
Table 1: SIM7100 series frequency bands......................................................................................................................... 9
Table 2: General Feature ................................................................................................................................................. 11
Table 3: Pin definition..................................................................................................................................................... 15
Table 4: IO Parameters Definition .................................................................................................................................. 16
Table 5: Pin description................................................................................................................................................... 16
Table 6: VBAT Pin Electronic Characteristic.................................................................................................................. 25
Table 7: Recommended zener diode models ................................................................................................................... 26
Table 8: Power on timing and Electronic Characteristic ................................................................................................. 29
Table 9: Power off timing and Electronic Characteristic................................................................................................. 30
Table 10: RESET Pin Electronic Characteristic .............................................................................................................. 31
Table 11: USIM Electronic characteristic in 1.8V mode (USIM_VDD =1.8V).............................................................. 34
Table 12: USIM Electronic characteristic 3.0V mode (USIM_VDD =2.95V)................................................................ 34
Table 13: Amphenol USIM Socket Pin Description........................................................................................................ 36
Table 14: PCM Format.................................................................................................................................................... 36
Table 15: Timing parameters........................................................................................................................................... 37
Table 16: MMC/SD Electronic characteristic* ............................................................................................................... 38
Table 17: NETLIGHT Pin Status.................................................................................................................................... 41
Table 18: FLIGHTMODE Pin Status.............................................................................................................................. 42
Table 19: Pin multiplex Function List............................................................................................................................. 43
Table 20: SD2 Pin description......................................................................................................................................... 44
Table 21: Sink Current Electronic characteristic............................................................................................................. 44
Table 22: ADC1 and ADC2 Electronic Characteristics................................................................................................... 45
Table 23: Electronic characteristic .................................................................................................................................. 46
Table 24: Conducted transmission power ....................................................................................................................... 47
Table 25: Operating frequencies ..................................................................................................................................... 47
Table 26: E-UTRA operating bands ................................................................................................................................ 48
Table 27: Conducted receive sensitivity.......................................................................................................................... 49
Table 28: Reference sensitivity (QPSK) ......................................................................................................................... 49
Table 29: Absolute maximum ratings.............................................................................................................................. 56
Table 30: Recommended operating ratings ..................................................................................................................... 56
Table 31: 1.8V Digital I/O characteristics*..................................................................................................................... 56
Table 32: Operating temperature..................................................................................................................................... 57
Table 33: Operating mode............................................................................................................................................... 57
Table 34: Current consumption....................................................................................................................................... 59
Table 35: The ESD performance measurement table (Temperature: 25℃, Humidity: 45%) .......................................... 61
Table 36: Moisture sensitivity level and floor life........................................................................................................... 63
Table 37: Coding schemes and maximum net data rates over air interface..................................................................... 66
Table 38: Related documents .......................................................................................................................................... 69
Table 39: Terms and Abbreviations................................................................................................................................. 71
Table 40: Safety caution.................................................................................................................................................. 73

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Figure Index
Figure 1: SIM7100 Functional Architecture ................................................................................................................... 11
Figure 2: Pin view........................................................................................................................................................... 14
Figure 3: Top dimensions (Unit: mm)............................................................................................................................. 21
Figure 4: Side dimensions (Unit: mm)............................................................................................................................ 22
Figure 5: Bottom dimensions (Unit: mm) ....................................................................................................................... 23
Figure 6: Footprint recommendation (Unit: mm)............................................................................................................ 24
Figure 7: VBAT voltage drop during burst emission (GSM/GPRS) ............................................................................... 25
Figure 8: VBAT input application circuit........................................................................................................................ 26
Figure 9: Reference circuit of the LDO power supply .................................................................................................... 27
Figure 10: Reference circuit of the DCDC power supply ............................................................................................... 27
Figure 11: Reference power on/off circuit ...................................................................................................................... 28
Figure 12: Power on Timing Sequence ........................................................................................................................... 28
Figure 13: Power off timing sequence ............................................................................................................................ 29
Figure 14: Reference Reset Circuit ................................................................................................................................. 30
Figure 15: UART Full modem ........................................................................................................................................ 31
Figure 16: UART Null modem........................................................................................................................................ 31
Figure 17: Reference circuit of level shift....................................................................................................................... 32
Figure 18: RI behaviour in NULL Modem ..................................................................................................................... 32
Figure 19: RI behaviour in FULL Modem ...................................................................................................................... 33
Figure 20: USB Reference Circuit .................................................................................................................................. 33
Figure 21: USIM interface reference circuit ................................................................................................................... 35
Figure 22: Amphenol SIM card socket ........................................................................................................................... 36
Figure 23: PCM_SYNC timing....................................................................................................................................... 36
Figure 24: EXT CODEC to MODULE timing................................................................................................................ 37
Figure 25: MODULE to EXT CODEC timing................................................................................................................ 37
Figure 26: Reference Circuit of PCM Application with Audio Codec ............................................................................ 38
Figure 27: SD Reference Circuit..................................................................................................................................... 39
Figure 28: I2C Reference Circuit.................................................................................................................................... 40
Figure 29: Keypad Reference Circuit.............................................................................................................................. 40
Figure 30: NETLIGHT Reference Circuit ...................................................................................................................... 41
Figure 31: Flight Mode Switch Reference Circuit .......................................................................................................... 42
Figure 32: ISINK Reference Circuit ............................................................................................................................... 45
Figure 33: Antenna matching circuit (MAIN_ANT)....................................................................................................... 51
Figure 34: Antenna matching circuit (AUX_ANT)......................................................................................................... 52
Figure 35: Active antenna circuit .................................................................................................................................... 54
Figure 36: Passive antenna circuit (Default) ................................................................................................................... 54
Figure 37: Top and bottom view of SIM7100 ................................................................................................................. 62
Figure 38: The ramp-soak-spike reflow profile of SIM7100 .......................................................................................... 63
Figure 39: Reference Design........................................................................................................................................... 65

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Revision History
Data Version Description of change Author
2015-01-20 1.01 Original Yang Hongliang
Li Ya

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1Introduction
This document describes electronic specifications, RF specifications, function interface, mechanical
characteristic and testing results of the SIMCom SIM7100 module. With the help of this document and
other SIM7100 software application notes/user guides, users can understand and use SIM7100 module to
design and develop applications quickly.
1.1 Product Outline
Designed for global market, SIM7100 supports 5 air-interface standards include GSM, TD-SCDMA,
CDMA, WCDMA and LTE. User can choose the module based on the wireless network configuration. In
this document, the supported radio band configuration of SIM7100 series is described in the following
table.
Table 1: SIM7100 series frequency bands
SIM7100x
Standard Frequency x=”C” x=”CE” x=”E” x=”JC” x=”JE” x=”V” x=”A”
GSM
850MHz
EGSM
900MHz

DCS
1800MHz

GSM
PCS
1900MHz
CDMA2000/
EVDO BC0 
BAND5 
BAND6 
BAND8 
BAND2 
WCDMA
BAND1 
TD-SCDMA
1.9G

TD-SCDMA
TD-SCDMA
2G

LTE-FDD B1 
LTE-FDD B2 
LTE-FDD B3 
LTE-FDD
LTE-FDD B4 

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LTE-FDD B5 
LTE-FDD B7 
LTE-FDD B8 
LTE-FDD
B13 
LTE-FDD
B17 
LTE-FDD
B18 
LTE-FDD
B19 
LTE-FDD
B20 
LTE TDD
B38

LTE TDD
B39

LTE TDD
B40

LTE-TDD
LTE TDD
B41

GNSS GPS 
GLONASS 
With a tiny configuration of 30*30*2.9 mm and integrated functions, SIM7100 can meet almost any space
requirement in users’ application, such as Smart phone, PDA phone, industrial handhelds,
machine-to-machine, vehicle applications, etc.
There are 87 pins on SIM7100, which can provide most application interfaces.
1.2 Hardware Interface Overview
Sub-interfaces are described in detail in the next chapter, which includes:
● Power Supply
● USB Interface
● UART Interface
● MMC/SD and SDIO Interfaces
● USIM Interface
● GPIO
● ADC
● LDO Power Output
● Current Sink Source
● PCM Interface
● Keypad Interface

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● SPI Interface
● I2C Interface
1.3 Hardware Diagram
The global architecture of the SIM7100 Embedded module is described in the figure below.
Figure 1: SIM7100 Functional Architecture
1.4 Functional Overview
Table 2: General Feature
Feature Implementation
Power supply Single supply voltage 3.4～4.3V
Power Save mode <5mA
Frequency bands Please refer to table 1
Transmitting power
GSM/GPRS:
Class 4 (2W): GSM850、EGSM900
Class 1 (1W): DCS1800、PCS1900
EDGE:
Class E2 (0.5W): GSM850、EGSM900
Class E1 (0.4W): DCS1800、PCS1900
UMTS:
Class 3 (0.25W): WCDMA,
Class 3 (0.25W): CDMA2000

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Class 2 (0.25W): TD-SCDMA
LTE:
Class 3 (0.25W): LTE
Connectivity Speed
GPRS multi-slot class 12
EDGE multi-slot class 12
UMTS R99 speed: 384 kbps DL/UL
HSPA+: 5.76 Mbps(UL), 42 Mbps(DL)
TD-HSDPA/HSUPA: 2.2 Mbps(UL), 2.8 Mbps(DL)
CDMA EVDO:Rev-0,Rev-A, Rev-B
LTE Category 3 - 100 Mbps (DL)
LTE Category 3 - 50 Mbps (UL)
Rx-diversity Support UMTS/LTE Rx-diversity.
GNSS
GNSS engine (GPS and GLONASS)
Protocol: NMEA
GPS support MS/UE-based, MS/UE-assisted, hybrid modes with
AFLT (CDMA), NMR (GSM), and MRL(UMTS, WCDMA,
LTE), standalone and network-aware modes
GLONASS support standalone mode
SMS
MT, MO, CB, Text and PDU mode
SMS storage: USIM card or ME(default)
Support transmission of SMS alternatively over CSD or GPRS.
User can choose preferred mode.
USIM interface Support identity card: 1.8V, 3V
USIM application toolkit
Support SAT class 3, GSM 11.14 Release 98
Support USAT
Phonebook management Support phonebook types: SM, FD, LD, RC, ON, MC
Audio feature
Support PCM interface
Support PCM master mode and short frame sync
Support 16-bit linear data formats
UART interface
Default one Full modem serial port
300bps to 4000000bps(default:115200bps)
Can be used for AT commands or data stream.
Support RTS/CTS hardware handshake and software ON/OFF
flow control
Multiplex ability according to GSM 07.10 Multiplexer Protocol.
Autobauding supports baud rate from 1200 bps to 115200bps
MMC/SD/SDIO
support MMC and SD cards with 1.8 V or 2.95 V on SD port
support SDIO with 1.8 V only on SD2 port
USB USB 2.0 specification-compliant as a peripheral
Firmware upgrade Firmware upgrade over USB interface
FOTA
Physical characteristics Size:30*30*2.9mm
Weight:5.7 g

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Temperature range
Normal operation temperature: -30°C to +80°C
Extended operation temperature: -40°C to +85°C*
Storage temperature -45°C to +90°C
*Note: Module is able to make and receive voice calls, data calls, SMS and make
GPRS/WCDMA/HSPA+/LTE traffic in -40℃~ +85℃. Temperatures outside of the range -30℃~ +80
℃might slightly deviate from 3GPP specifications.

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2Package Information
2.1 Pin Configuration
All hardware interfaces which connect SIM7100 to customers’ application platform are through 87 pins
pads (Metal half hole). Figure 2 is SIM7100 outline diagram.
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
SPI_MISO
1
GND
81
GND
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
60
82
22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 21
79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 80
GND
PWRKEY
RESET
GND
GND
SPI_CLK
SPI_MOSI
SPI_CS
USB_VBUS
USB_DN
USB_DP
GND
VDD_1V8
USB_ID
USIM_DATA
USIM_RST
USIM_CLK
USIM_VDD
SD_CMD
SD_DATA0
SD_DATA1
SD_DATA2 SD_DATA3
SD_CLK
KBC1 KBC0 KBR0 KBR2 KBC2 KBC3 KBR1 KBR4 KBR3 KBC4
GND
GND
VBAT VBAT
MAIN_ANT
GND
NC
GND
VDD_EXT
ISINK
ADC2
ADC1
SD1_DET
STATUS
GPIO43
NETLIGHT
GPIO41
USIM_DET
FLIGHTMODE
SCL
SDA
GND
GND
GND
AUX_ANT
GND VBAT VBAT GND GND RTS CTS RXD RI DCD TXD DTR PCM_OUT PCM_IN PCM_SYNC PCM_CLK
GND GND GND
GNSS_ANT
SIM7100
Top View
84
COEX2
83
COEX1
85 BOOT_CFG0
87 BOOT_CFG1 86 COEX3
Figure 2: Pin view

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Table 3: Pin definition
Pin No. Define Pin No. Define
1 GND 2 GND
3 PWRKEY 4 RESET
5 GND 6 SPI_CLK
7 SPI_MISO 8 SPI_MOSI
9 SPI_CS 10 GND
11 USB_VBUS 12 USB_DN
13 USB_DP 14 GND
15 VDD_1V8 16 USB_ID
17 USIM_DATA 18 USIM_RST
19 USIM_CLK 20 USIM_VDD
21 SD_CMD 22 SD_DATA0
23 SD_DATA1 24 SD_DATA2
25 SD_DATA3 26 SD_CLK
27 KBC1 28 KBC0
29 KBR0 30 KBR2
31 KBC2 32 KBC3
33 KBR1 34 KBR4
35 KBR3 36 KBC4
37 GND 38 VBAT
39 VBAT 40 GND
41 GND 42 NC
43 GND 44 VDD_EXT
45 ISINK 46 ADC2
47 ADC1 48 SD1_DET
49 STATUS 50 GPIO43
51 NETLIGHT 52 GPIO41
53 USIM_DET 54 FLIGHTMODE
55 SCL 56 SDA
57 GND 58 GND
59 AUX_ANT 60 GND
61 GND 62 VBAT
63 VBAT 64 GND
65 GND 66 RTS

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67 CTS 68 RXD
69 RI 70 DCD
71 TXD 72 DTR
73 PCM_OUT 74 PCM_IN
75 PCM_SYNC 76 PCM_CLK
77 GND 78 GND
79 GNSS_ANT 80 GND
81 GND 82 MAIN_ANT
83 COEX1 84 COEX2
85 BOOT_CFG0 86 COEX3
87 BOOT_CFG1
2.2 Pin description
Table 4: IO Parameters Definition
Pin Type Description
PI Power input
PO Power output
AI Analog input
AIO Analog input/output
I/O Bidirectional input /output
DI Digital input
DO Digital output
DOH Digital output with high level
DOL Digital output with low level
PU Pull up
PD Pull down
Table 5: Pin description
Pin name Pin
No. Default Status Description Comment
Power Supply
VBAT
38,
39,
62,
63
PI Power supply voltage, supply
voltage is 3.4～4.3V.
NC 42 No connection.
Please keep open, or
place a 100nF
capacitor to ground to

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be compatible with
SIM5360.
VDD_EXT 44 PO
LDO power output for SD card
circuit or other external circuit with
Max. 150mA output. Its output
voltage is Configurable.
If unused, please keep
open.
VDD_1V8 15 PO
1.8V SMPS output with Max. 50mA
output for external circuit, such as
level shift circuit.
Recommend placing a
10uF and 100nF
capacitors to improve
the stability of the
internal 1.8V SMPS
circuit.
GND
1,2,
5,
10,
14,
37,
40,
41,
43,
57,
58,
60,
61,
64,
65,
77,
78,
80,
81
Ground
System Control
PWRKEY 3 DI,PU System power on/off input, active
low.
PWRKEY has been
pulled up to 1.8V via
a 200KΩresistor in
module.
RESET 4 DI, PU System reset input, active low.
RESET has been
pulled up to 1.8V via
a 40KΩresistor in
module.
SD interface
SD_CMD 21 DO SDIO command
SD_DATA0 22 I/O SDIO data
SD_DATA1 23 I/O SDIO data
SD_DATA2 24 I/O SDIO data
SD_DATA3 25 I/O SDIO data
SD_CLK 26 DO SDIO clock
Do not need pull up
resistors on these pins.
If unused, please keep
open.
USIM interface

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USIM_DATA 17 I/O,PU
USIM Card data I/O, which has been
pulled up with a 20KR resistor to
USIM_VDD in module. Do not pull
up or pull down in users’ application
circuit.
USIM_RST 18 DO USIM Reset
USIM_CLK 19 DO USIM clock
USIM_VDD 20 PO
USIM Card Power output, output
Voltage depends on USIM mode
automatically，and one is
3.0V±10%, another is 1.8V±10%.
Current is less than 50mA.
All signals of USIM
interface should be
protected against
ESD/EMC.
SPI interface
SPI_CLK 6 DO SPI clock
SPI_MISO 7 DI SPI master in/slave out data
SPI_MOSI 8 DO SPI master out/slave in data
SPI_CS 9 DO SPI chip-select
Only support SPI
master mode.
If unused, please keep
open.
USB
USB_VBUS 11 DI,PD Valid USB detection input with
2.0～5.25Vdetection voltage
USB_VBUS has been
pulled down to ground
via a 10KΩresistor in
module.
USB_DN 12 I/O Negative line of the differential,
bi-directional USB signal.
USB_DP
13 I/O Positive line of the differential, bi-directional USB signal.
USB_ID 16 DI High-speed USB ID Please keep it open.
UART interface
RTS 66 DOH Request to send
CTS 67 DI,PU Clear to Send
RXD 68 DI,PU Receive Data
RI 69 DOH Ring Indicator
DCD 70 DOH Carrier detects
TXD 71 DOH Transmit Data
DTR 72 DI,PU DTE get ready
If unused, keep open.
I2C interface
SCL 55 DO I2C clock output If unused, keep open;
else please place 2

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SDA 56 I/O I2C data input/output external pull-up 10KΩ
resistors to 1.8V.
Keypad interface
KBR0 29 DOH Bit 0 drive to the pad matrix
KBR1 33 DOH Bit 1 drive to the pad matrix
KBR2 30 DOH Bit 2 drive to the pad matrix
KBR3 35 DOH Bit 3 drive to the pad matrix
KBR4 34 DOH Bit 4 drive to the pad matrix
KBC0 28 DI,PD Bit 0 for sensing key press on pad
matrix
KBC1 27 DI,PD Bit 1 for sensing key press on pad
matrix
KBC2 31 DI,PD Bit 2 for sensing key press on pad
matrix
KBC3 32 DI,PD Bit 3 for sensing key press on pad
matrix
KBC4 36 DI,PD Bit 4 for sensing key press on pad
matrix
All Keypad pins can
be configured as
GPIOs.
KBC0, KBC1, KBC2,
KBC3, KBR0 and
KBR2 can be
configured as SD2
interface. If unused,
please keep open.
PCM interface
PCM_OUT 73 DO PCM data output.
PCM_IN 74 DI PCM data input.
PCM_SYNC 75 DO PCM data frame sync signal.
PCM_CLK 76 DO PCM data bit clock.
If unused, please keep
open.
GPIO
NETLIGHT 51 DO Output as LED control for network
status.
FLIGHTMODE 54 DI,PU
Input pin as Flight Mode control.
High level: Normal Mode
Low level: Flight Mode
STATUS 49 DO
Output pin as operating status
indicating of module.
High level: Power on
Low level: Power off
GPIO41 52 DO GPIO41
GPIO43 50 DI
Default: GPIO43
Optional: Input pin as wake/interrupt
signal to module from host.
SD1_DET 48 DI
Default: GPIO44
Optional: Input pin as SD card
detecting.
H: SD card is removed
L: SD card is inserted
USIM_DET 53 DI
Default: GPIO42
Optional: Input pin as USIM card
detecting.
H: USIM is removed
L: USIM is inserted
If unused, keep open.

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SIM7100_Hardware Design_V1.01 2015-01-20
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RF interface
MAIN _ANT 82 AIO MAIN antenna soldering pad
GNSS_ANT 79 AI GNSS antenna soldering pad
AUX_ANT 59 AI Diversity antenna soldering pad
Other interface
ISINK 45 PO Current source of ground-referenced
current sink
ADC1 47 AI Analog digital converter input 1
ADC2 46 AI Analog digital converter input 2
If unused, please keep
open.
COEX1 83 I/O
COEX2 84 I/O
COEX3 86 I/O
RF synchronizing between wifi and
LTE. If unused, keep open.
BOOT_CFG0 85 DI,PD
BOOT_CFG1 87 DI,PD
Boot configure,
Module will be forced to go into
USB download mode by connect 85
and 87 pins to VDD_1V8 during
power up.
Recommend placing 2
test points for debug.