Telit Communications S p A ME910C1WW, NE910C1NA User Guide
ME910C1
HW User Guide
1VV03001351 Rev. 8 – 2018-09-28
Mod. 0805 2016-08 Rev.5
ME910C1 HW User Guide
SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE
NOTICE
While reasonable efforts have been made to assure the accuracy of this document, Telit
assumes no liability resulting from any inaccuracies or omissions in this document, or from
use of the information obtained herein. The information in this document has been carefully
checked and is believed to be reliable. However, no responsibility is assumed for
inaccuracies or omissions. Telit reserves the right to make changes to any products
described herein and reserves the right to revise this document and to make changes from
time to time in content hereof with no obligation to notify any person of revisions or changes.
Telit does not assume any liability arising out of the application or use of any product,
software, or circuit described herein; neither does it convey license under its patent rights
or the rights of others.
It is possible that this publication may contain references to, or information about Telit
products (machines and programs), programming, or services that are not announced in
your country. Such references or information must not be construed to mean that Telit
intends to announce such Telit products, programming, or services in your country.
COPYRIGHTS
This instruction manual and the Telit products described in this instruction manual may be,
include or describe copyrighted Telit material, such as computer programs stored in
semiconductor memories or other media. Laws in the Italy and other countries preserve for
Telit and its licensors certain exclusive rights for copyrighted material, including the
exclusive right to copy, reproduce in any form, distribute and make derivative works of the
copyrighted material. Accordingly, any copyrighted material of Telit and its licensors
contained herein or in the Telit products described in this instruction manual may not be
copied, reproduced, distributed, merged or modified in any manner without the express
written permission of Telit. Furthermore, the purchase of Telit products shall not be deemed
to grant either directly or by implication, estoppel, or otherwise, any license under the
copyrights, patents or patent applications of Telit, as arises by operation of law in the sale
of a product.
COMPUTER SOFTWARE COPYRIGHTS
The Telit and 3rd Party supplied Software (SW) products described in this instruction
manual may include copyrighted Telit and other 3rd Party supplied computer programs
stored in semiconductor memories or other media. Laws in the Italy and other countries
preserve for Telit and other 3rd Party supplied SW certain exclusive rights for copyrighted
computer programs, including the exclusive right to copy or reproduce in any form the
copyrighted computer program. Accordingly, any copyrighted Telit or other 3rd Party
supplied SW computer programs contained in the Telit products described in this instruction
manual may not be copied (reverse engineered) or reproduced in any manner without the
express written permission of Telit or the 3rd Party SW supplier. Furthermore, the purchase
of Telit products shall not be deemed to grant either directly or by implication, estoppel, or
otherwise, any license under the copyrights, patents or patent applications of Telit or other
3rd Party supplied SW, except for the normal non-exclusive, royalty free license to use that
arises by operation of law in the sale of a product.
1VV0301351 Rev.8 Page 2 of 100 2018-09-28
ME910C1 HW User Guide
USAGE AND DISCLOSURE RESTRICTIONS
I. License Agreements
The software described in this document is the property of Telit and its licensors. It is
furnished by express license agreement only and may be used only in accordance with the
terms of such an agreement.
II. Copyrighted Materials
Software and documentation are copyrighted materials. Making unauthorized copies is
prohibited by law. No part of the software or documentation may be reproduced,
transmitted, transcribed, stored in a retrieval system, or translated into any language or
computer language, in any form or by any means, without prior written permission of Telit
III. High Risk Materials
Components, units, or third-party products used in the product described herein are NOT
fault-tolerant and are NOT designed, manufactured, or intended for use as on-line control
equipment in the following hazardous environments requiring fail-safe controls: the
operation of Nuclear Facilities, Aircraft Navigation or Aircraft Communication Systems, Air
Traffic Control, Life Support, or Weapons Systems (High Risk Activities"). Telit and its
supplier(s) specifically disclaim any expressed or implied warranty of fitness for such High
Risk Activities.
IV. Trademarks
TELIT and the Stylized T Logo are registered in Trademark Office. All other product or
service names are the property of their respective owners.
V. Third Party Rights
The software may include Third Party Right software. In this case you agree to comply with
all terms and conditions imposed on you in respect of such separate software. In addition
to Third Party Terms, the disclaimer of warranty and limitation of liability provisions in this
License shall apply to the Third Party Right software.
TELIT HEREBY DISCLAIMS ANY AND ALL WARRANTIES EXPRESS OR IMPLIED
FROM ANY THIRD PARTIES REGARDING ANY SEPARATE FILES, ANY THIRD PARTY
MATERIALS INCLUDED IN THE SOFTWARE, ANY THIRD PARTY MATERIALS FROM
WHICH THE SOFTWARE IS DERIVED (COLLECTIVELY “OTHER CODE”), AND THE
USE OF ANY OR ALL THE OTHER CODE IN CONNECTION WITH THE SOFTWARE,
INCLUDING (WITHOUT LIMITATION) ANY WARRANTIES OF SATISFACTORY
QUALITY OR FITNESS FOR A PARTICULAR PURPOSE.
NO THIRD PARTY LICENSORS OF OTHER CODE SHALL HAVE ANY LIABILITY FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED
AND WHETHER MADE UNDER CONTRACT, TORT OR OTHER LEGAL THEORY,
ARISING IN ANY WAY OUT OF THE USE OR DISTRIBUTION OF THE OTHER CODE
OR THE EXERCISE OF ANY RIGHTS GRANTED UNDER EITHER OR BOTH THIS
LICENSE AND THE LEGAL TERMS APPLICABLE TO ANY SEPARATE FILES, EVEN IF
ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
1VV0301351 Rev.8 Page 3 of 100 2018-09-28
ME910C1 HW User Guide
APPLICABILITY TABLE
PRODUCTS
ME910C1-NA
ME910C1-NV
ME910C1-N1
ME910C1-E1
ME910C1-AU
ME910C1-K1
ME910C1-J1
ME910C1-E2
ME910C1-WW
NE910C1-E1
NE910C1-NA
1VV0301351 Rev.8 Page 4 of 100 2018-09-28
ME910C1 HW User Guide
Contents
NOTICE 2
COPYRIGHTS ................................................................................................ 2
COMPUTER SOFTWARE COPYRIGHTS ...................................................... 2
USAGE AND DISCLOSURE RESTRICTIONS ............................................... 3
I. License Agreements ..................................................................... 3
II. Copyrighted Materials ................................................................... 3
III. High Risk Materials ....................................................................... 3
IV. Trademarks .................................................................................. 3
V. Third Party Rights ......................................................................... 3
APPLICABILITY TABLE ................................................................................ 4
CONTENTS .................................................................................................... 5
1.
INTRODUCTION .......................................................................... 9
Scope ........................................................................................... 9
Audience....................................................................................... 9
Contact Information, Support ........................................................ 9
Text Conventions ........................................................................ 10
Related Documents .................................................................... 10
2.
3.
OVERVIEW ................................................................................ 11
PINS ALLOCATION ................................................................... 13
Pin-out ........................................................................................ 13
LGA Pads Layout ........................................................................ 23
4.
POWER SUPPLY ....................................................................... 24
Power Supply Requirements ....................................................... 24
Power Consumption ................................................................... 26
General Design Rules ................................................................. 29
4.3.1. Electrical Design Guidelines of the power supply ........................ 29
4.3.1.1. +5V Source Power Supply Design Guidelines ............................ 29
4.3.1.2. +12V Source Power Supply Design Guidelines .......................... 30
4.3.1.3. Battery Source Power Supply Design Guidelines ........................ 31
4.3.2. Thermal Design Guidelines ......................................................... 32
4.3.3. Power Supply PCB layout Guidelines ......................................... 32
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ME910C1 HW User Guide
VAUX Power Output ................................................................... 35
RTC Supply ................................................................................ 35
5.
DIGITAL SECTION .................................................................... 36
Logic Levels ................................................................................ 36
Power On.................................................................................... 36
Power Off.................................................................................... 41
Wake from deep sleep mode ...................................................... 43
Unconditional Shutdown ............................................................. 43
Fast power down ........................................................................ 47
5.6.1. Fast Shut Down by Hardware ..................................................... 47
5.6.2. Fast Shut Down by Software....................................................... 48
Communication ports .................................................................. 49
5.7.1. USB 2.0 HS ................................................................................ 49
5.7.2. SPI.............................................................................................. 50
5.7.3. Serial Ports ................................................................................. 51
5.7.3.1. Modem serial port 1 .................................................................... 51
5.7.3.2. Modem serial port 2 .................................................................... 53
5.7.3.3. RS232 level translation ............................................................... 54
General purpose I/O ................................................................... 55
5.8.1. Using a GPIO as INPUT ............................................................. 56
5.8.2. Using a GPIO as OUTPUT ......................................................... 57
5.8.3. Indication of network service availability ..................................... 57
External SIM Holder .................................................................... 58
ADC Converter ........................................................................... 58
6.
RF SECTION .............................................................................. 60
Bands Variants ........................................................................... 60
TX Output power ......................................................................... 60
RX Sensitivity ............................................................................. 61
Antenna requirements................................................................. 66
6.4.1. PCB Design guidelines ............................................................... 70
6.4.2. PCB Guidelines in case of FCC Certification .............................. 72
6.4.2.1. Transmission line design ............................................................ 72
6.4.2.2. Transmission Line Measurements .............................................. 73
6.4.2.3. Antenna Installation Guidelines ................................................... 75
7.
AUDIO SECTION ....................................................................... 76
Electrical Characteristics ............................................................. 76
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ME910C1 HW User Guide
Codec examples ......................................................................... 76
8.
GNSS SECTION ......................................................................... 77
GNSS Signals Pin-out................................................................. 77
RF Front End Design .................................................................. 77
8.2.1. Guidelines of PCB line for GNSS Antenna .................................. 77
GNSS Antenna Requirements .................................................... 77
8.3.1. GNSS Antenna specification ....................................................... 78
8.3.2. GNSS Antenna – Installation Guidelines ..................................... 78
8.3.3. Powering the External LNA (active antenna) ............................... 78
GNSS Characteristics * ............................................................... 79
9.
MECHANICAL DESIGN ............................................................. 80
Drawing ...................................................................................... 80
10.
APPLICATION PCB DESIGN .................................................... 81
Footprint ..................................................................................... 81
PCB pad design .......................................................................... 82
PCB pad dimensions .................................................................. 83
Stencil ......................................................................................... 84
Solder paste ............................................................................... 84
Solder Reflow ............................................................................. 85
11.
PACKAGING .............................................................................. 87
Tray ............................................................................................ 87
Reel ............................................................................................ 88
Carrier Tape detail ...................................................................... 89
Reel detail ................................................................................... 90
Packaging detail ......................................................................... 91
Moisture sensitivity ..................................................................... 91
12.
CONFORMITY ASSESSMENT ISSUES .................................... 92
Approvals.................................................................................... 92
FCC certificates .......................................................................... 92
IC/ISED certificates ..................................................................... 92
FCC/ISED Regulatory notices ..................................................... 92
Declaration of Conformity ........................................................... 95
13.
SAFETY RECOMMENDATIONS................................................ 96
READ CAREFULLY .................................................................... 96
14.
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ACRONYMS ............................................................................... 97
ME910C1 HW User Guide
15.
DOCUMENT HISTORY .............................................................. 99
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ME910C1 HW User Guide
1. INTRODUCTION
Scope
Scope of this document is to give a description of some hardware solutions useful for
developing a product with the Telit ME910C1 module.
Audience
This document is intended for Telit customers, who are integrators, about to implement
their applications using our ME910C1 modules.
Contact Information, Support
For general contact, technical support services, technical questions and report
documentation errors contact Telit Technical Support at:
•
TS-EMEA@telit.com
•
TS-AMERICAS@telit.com
•
TS-APAC@telit.com
•
TS-SRD@telit.com
Alternatively, use:
http://www.telit.com/support
For detailed information about where you can buy the Telit modules or for recommendations
on accessories and components visit:
http://www.telit.com
Our aim is to make this guide as helpful as possible. Keep us informed of your comments
and suggestions for improvements.
Telit appreciates feedback from the users of our information.
1VV0301351 Rev.8 Page 9 of 100 2018-09-28
ME910C1 HW User Guide
Text Conventions
Danger – This information MUST be followed or catastrophic
equipment failure or bodily injury may occur.
Caution or Warning – Alerts the user to important points about
integrating the module, if these points are not followed, the module and
end user equipment may fail or malfunction.
Tip or Information – Provides advice and suggestions that may be
useful when integrating the module.
All dates are in ISO 8601 format, i.e. YYYY-MM-DD.
Related Documents
80000NT10001A - SIM INTEGRATION DESIGN GUIDES Application Note
80000NT10060A - xE910 Global Form Factor Application Note
80000NT10002A - ANTENNA DETECTION
80000NT10003A - Rework procedure for BGA modules
80000NT10028A - Event Monitor Application Note
80000NT11246A - LE910/LE920 Digital Voice Interface Application Note
1VV0301351 Rev.8 Page 10 of 100 2018-09-28
ME910C1 HW User Guide
2. OVERVIEW
The aim of this document is the description of some hardware solutions useful for
developing a product with the Telit ME910C1 module. In this document all the basic
functions of a m2m module will be taken into account; for each one of them a proper
hardware solution will be suggested and eventually the wrong solutions and common errors
to be avoided will be evidenced. Obviously this document cannot embrace the whole
hardware solutions and products that may be designed. The wrong solutions to be avoided
shall be considered as mandatory, while the suggested hardware configurations shall not
be considered mandatory, instead the information given shall be used as a guide and a
starting point for properly developing your product with the Telit ME910C1 module. For
further hardware details that may not be explained in this document refer to the Telit
ME910C1 Product Description document where all the hardware information is reported.
NOTE:
(EN) The integration of the ME910C1 cellular module within user
application shall be done according to the design rules described in
this manual.
(IT) L’integrazione del modulo cellulare ME910C1 all’interno
dell’applicazione dell’utente dovrà rispettare le indicazioni progettuali
descritte in questo manuale.
(DE) Die Integration des ME910C1 Mobilfunk-Moduls in ein Gerät
muß gemäß der in diesem Dokument beschriebenen
Kunstruktionsregeln erfolgen.
(SL) Integracija ME910C1 modula v uporabniški aplikaciji bo morala
upoštevati projektna navodila, opisana v tem priročniku.
(SP) La utilización del modulo ME910C1 debe ser conforme a los
usos para los cuales ha sido deseñado descritos en este manual del
usuario.
(FR) L’intégration du module cellulaire ME910C1 dans l’application
de l’utilisateur sera faite selon les règles de conception décrites dans
ce manuel.
(HE)
ME910C1
The information presented in this document is believed to be accurate and reliable.
However, no responsibility is assumed by Telit Communications S.p.A. for its use, nor any
1VV0301351 Rev.8 Page 11 of 100 2018-09-28
ME910C1 HW User Guide
infringement of patents or other rights of third parties which may result from its use. No
license is granted by implication or otherwise under any patent rights of Telit
Communications S.p.A. other than for circuitry embodied in Telit products. This document
is subject to change without notice.
1VV0301351 Rev.8 Page 12 of 100 2018-09-28
ME910C1 HW User Guide
3. PINS ALLOCATION
Pin-out
Pin Signal I/O
USB HS 2.0 COMMUNICATION PORT (FW upgrade and Data)
B15
C15
A13
Asynchronous Serial Port (FW upgrade and Data with Flow Control)
N15
M15
M14
USB_D+ I/O USB differential Data (+)
USB_D- I/O USB differential Data (-)
VUSB I Enable pin for the internal
C103/TXD I Serial data input from DTE CMOS 1.8V
C104/RXD O Serial data output to DTE CMOS 1.8V
C108/DTR I Input for (DTR) from DTE CMOS 1.8V
Function Type Comment
5 / 3V Internal PD
USB transceiver.
(100K)
L14
P15
N14
P14
R14
1VV0301351 Rev.8 Page 13 of 100 2018-09-28
C105/RTS I Input for Request to send
signal (RTS) from DTE
C106/CTS O Output for Clear to Send
signal (CTS) to DTE
C109/DCD O Output for (DCD) to DTE CMOS 1.8V
C107/DSR O Output for (DSR) to DTE CMOS 1.8V
C125/RING O Output for Ring (RI) to
DTE
CMOS 1.8V
CMOS 1.8V
CMOS 1.8V
ME910C1 HW User Guide
SIM Card Interface
A6
A7
A5
A4
A3
SIMCLK
SIMRST
SIMIO
SIMIN
SIMVCC
Digital Voice Interface (DVI)
B9
DVI_WA0 I/O
O
O
I/O
I
-
External SIM signal –
Clock
External SIM signal –
Reset
External SIM signal –
Data I/O
External SIM signal –
Presence (active low)
External SIM signal –
Power supply for the SIM
Digital Audio Interface
(WA0)
1.8 / 3V
1.8 / 3V
1.8 / 3V
CMOS 1.8
Internal PU
1.8 / 3V
1.8V
(47K)
SPI
B6
B7
B8
D15
E15
F15
H14
DVI_RX I
DVI_TX I/O
DVI_CLK I/O
Digital Audio Interface
(RX)
Digital Audio Interface
(TX)
Digital Audio Interface
(CLK)
1.8V
1.8V
1.8V
SPI_MOSI O SPI MOSI CMOS 1.8V
SPI_MISO I SPI_MISO CMOS 1.8V
SPI_CLK O SPI Clock CMOS 1.8V
SPI_CS O SPI Chip Select CMOS 1.8V
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ME910C1 HW User Guide
DIGITAL IO
C8
GPIO_01 I/O GPIO_01 /STAT LED CMOS 1.8V
STAT LED
is alternate
function
C9
C10
C11
B14
C12
C13
K15
L15
GPIO_09 I/O GPIO_09 CMOS 1.8V
G15
GPIO_10 I/O GPIO_10 CMOS 1.8V
GPIO_02 I/O GPIO_02 CMOS 1.8V
GPIO_03 I/O GPIO_03 CMOS 1.8V
GPIO_04 I/O GPIO_04 CMOS 1.8V
GPIO_05 I/O GPIO_05 CMOS 1.8V
GPIO_06 I/O GPIO_06 CMOS 1.8V
GPIO_07 I/O GPIO_07 CMOS 1.8V
GPIO_08 I/O GPIO_08 CMOS 1.8V
ADC
B1
ADC_IN AI
Analog Digital Converter
input
RF SECTION
K1
ANTENNA I/O
1VV0301351 Rev.8 Page 15 of 100 2018-09-28
LTE Antenna
(50 ohm)
RF
ME910C1 HW User Guide
GNSS Section
R9
ANT_GNSS I
R7
GNSS_LNA_EN O
Miscellaneous Functions
R13
HW_SHUTDOWN* I
R12
ON_OFF*/WAKE* I
R11
VAUX/PWRMON O
F14
FORCED_USB_BOO
T
GNSS Antenna
(50 ohm)
External GNSS LNA
Enable
HW Unconditional
Shutdown
Input command for power
ON and to wake from deep
sleep mode
Supply Output for external
accessories / Power ON
Monitor
Debug pin, connect to test
I
point
RF
CMOS 1.8V
1.8V Active low
1.8V Active low
1.8V
Active high,
CMOS 1.8V
internal PD
(100K)
Power Supply
M1
VBATT -
M2
VBATT -
N1
VBATT_PA -
N2
VBATT_PA -
P1
VBATT_PA -
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Main power supply
(Baseband)
Main power supply
(Baseband)
Main power supply (Radio
PA)
Main power supply (Radio
PA)
Main power supply (Radio
PA)
Power
Power
Power
Power
Power
ME910C1 HW User Guide
P2
VBATT_PA -
E1
GND -
G1
GND -
H1
GND -
J1
GND -
L1
GND -
A2
GND -
E2
GND -
F2
GND -
Main power supply (Radio
PA)
Ground Power
Ground Power
Ground Power
Ground Power
Ground Power
Ground Power
Ground Power
Ground Power
Power
G2
GND -
H2
GND -
J2
GND -
K2
GND -
L2
GND -
R2
GND -
M3
GND -
N3
GND -
P3
GND -
R3
GND -
Ground Power
Ground Power
Ground Power
Ground Power
Ground Power
Ground Power
Ground Power
Ground Power
Ground Power
Ground Power
D4
GND -
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Ground Power
ME910C1 HW User Guide
M4
GND -
N4
GND -
P4
GND -
R4
GND -
N5
GND -
P5
GND -
R5
GND -
N6
GND -
Ground Power
Ground Power
Ground Power
Ground Power
Ground Power
Ground Power
Ground Power
Ground Power
P6
GND -
R6
GND -
P8
GND -
R8
GND -
P9
GND -
P10
GND -
R10
GND -
M12
GND -
B13
GND -
P13
GND -
Ground Power
Ground Power
Ground Power
Ground Power
Ground Power
Ground Power
Ground Power
Ground Power
Ground Power
Ground Power
E14
GND -
Ground Power
RESERVED
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ME910C1 HW User Guide
C1
D1
RESERVED - RESERVED
F1
RESERVED - RESERVED
B2
RESERVED - RESERVED
C2
RESERVED - RESERVED
D2
RESERVED - RESERVED
B3
RESERVED - RESERVED
C3
RESERVED - RESERVED
RESERVED
-
RESERVED
D3
RESERVED - RESERVED
E3
RESERVED - RESERVED
F3
RESERVED - RESERVED
G3
RESERVED - RESERVED
K3
RESERVED - RESERVED
L3
RESERVED - RESERVED
B4
RESERVED - RESERVED
C4
RESERVED - RESERVED
B5
RESERVED - RESERVED
C5
RESERVED - RESERVED
C6
RESERVED - RESERVED
C7
RESERVED - RESERVED
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ME910C1 HW User Guide
N7
RESERVED - RESERVED
P7
RESERVED - RESERVED
N8
RESERVED - RESERVED
N9
RESERVED - RESERVED
A10
RESERVED - RESERVED
N10
RESERVED - RESERVED
N11
RESERVED - RESERVED
P11
RESERVED - RESERVED
B12
RESERVED - RESERVED
D12
RESERVED - RESERVED
N12
RESERVED - RESERVED
P12
RESERVED - RESERVED
G14
RESERVED - RESERVED
J14
RESERVED - RESERVED
K14
RESERVED - RESERVED
N13
RESERVED - RESERVED
L13
RESERVED - RESERVED
J13
RESERVED - RESERVED
M13
RESERVED - RESERVED
K13
RESERVED - RESERVED
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ME910C1 HW User Guide
H13
RESERVED - RESERVED
G13
RESERVED - RESERVED
F13
RESERVED - RESERVED
B11
RESERVED - RESERVED
B10
RESERVED - RESERVED
A9
RESERVED - RESERVED
A8
RESERVED - RESERVED
E13
RESERVED - RESERVED
D13
RESERVED - RESERVED
D14
RESERVED - RESERVED
A14
RESERVED - RESERVED
A12
RESERVED - RESERVED
A11
RESERVED - RESERVED
H15
RESERVED - RESERVED
J15
RESERVED - RESERVED
C14
H3
J3
RESERVED - RESERVED
RESERVED - RESERVED
RESERVED - RESERVED
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ME910C1 HW User Guide
WARNING:
Reserved pins must not be connected.
Only D13-E13 pins can be connected together in order to be
compatible with HE910 module.
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ME910C1 HW User Guide
LGA Pads Layout
TOP VIEW
A B C D E F G H J K L M N P R
1 ADC_IN1 RES RES GND RES GND GND GND ANT GND VBATT
2 GND RES RES RES GND GND GND GND GND GND GND VBATT
3 SIMVCC RES RES RES RES RES RES RES RES RES RES GND GND GND GND
4 SIMIN RES RES GND GND GND GND GND
5 SIMIO RES RES GND GND GND
6 SIMCLK DVI_RX RES GND GND GND
7 SIMRST DVI_TX RES RES RES
8 RES DVI_CLK GPIO_01 RES GND GND
9 RES DVI_WA0 GPIO_02 RES GND ANT_GNSS
10 RES RES GPIO_03 RES GND GND
11 RES RES GPIO_04 RES RES
VBATT_PA VBATT_PA
VBATT_PA VBATT_PA
GND
GNSS_LNA
_EN
VAUX/PWR
MON
12 RES RES GPIO_06 RES GND RES RES
13 VUSB GND GPIO_07 RES RES RES RES RES RES RES RES RES RES GND
SPI_MISO
RX_AUX
FORCE_U
SB_BOOT
SPI_CLK GPIO_10 RES RES GPIO_08 GPIO_09 C104/RXD C103/TXD C106/CTS
RES SPI_CS RES RES C105/RTS C108/DTR C109/DCD C107/DSR C125/RING
14 RES GPIO_05 RES RES GND
15 USB_D+ USB_D-
SPI_MOSI
TX_AUX
ON_OFF*/
WAKE*
HW_SHUT
DOWN*
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ME910C1 HW User Guide
4. POWER SUPPLY
The power supply circuitry and board layout are a very important part in the full product
design and they strongly reflect on the product overall performances, hence read carefully
the requirements and the guidelines that will follow for a proper design.
Power Supply Requirements
The external power supply must be connected to VBATT and VBATT_PA pads and must
fulfil the following requirements:
Power Supply
Nominal Supply Voltage
Operating Voltage Range
Extended Voltange Range
NOTE:
The Operating Voltage Range MUST never be exceeded; care must
be taken when designing the application’s power supply section to
avoid having an excessive voltage drop.
If the voltage drop is exceeding the limits it could cause an
unintentional power off of ME910C1 module.
The Power supply must be higher than 3.20 V to power on the
ME910C1 module.
3.8V
Value
3.40 V÷ 4.20 V
3.20 V÷ 4.50 V
Overshoot voltage (regarding MAX Extended Operating Voltage) and
drop in voltage (regarding MIN Extended Operating Voltage) MUST
never be exceeded;
The “Extended Operating Voltage Range” can be used only with
completely assumption and application of the HW User guide
suggestions.
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ME910C1 HW User Guide
NOTE:
For PTCRB approval on the final products the power supply is
required to be within the “Normal Operating Voltage Range”.
1VV0301351 Rev.8 Page 25 of 100 2018-09-28
ME910C1 HW User Guide
Power Consumption
*Preliminary data
Mode
Switched off
IDLE mode
AT+CFUN=1
AT+CFUN=4
AT+CFUN=5
Operative Mode
Average
Mode Description
(mA)
0.008mA Module supplied but switched off
12 mA Normal mode: full functionality of the module
11 mA Disabled TX and RX; module is not registered on
the network
2.3 mA Paging cycle #64 frames (0.64 sec DRx cycle)
1.4 mA Paging cycle #128 frames (1.28 sec DRx cycle)
1.1 mA Paging cycle #256 frames (2.56 sec DRx cycle)
(LTE) CAT M1
Data call
10MHz RB=1
(LTE) CAT NB1
Data call
GPRS Data call
1TX+1RX slots,
GSM900
GPRS Data call
4TX+1RX slots,
GSM900
1VV0301351 Rev.8 Page 26 of 100 2018-09-28
190mA VBATT_PA+VBATT TX=23dBm
112mA VBATT_PA+VBATT TX=0dBm
50mA VBATT_PA+VBATT TX=23dBm
30mA VBATT_PA+VBATT TX=0dBm
240mA VBATT_PA+VBATT TX=33dBm
112mA VBATT_PA+VBATT TX=0dBm
520mA VBATT_PA+VBATT TX=28dBm
130mA VBATT_PA+VBATT TX=0dBm
ME910C1 HW User Guide
PSM Mode
AT+CPSMS=1
GPS
GNSS
GNSS
GPS
GPS
1800
1600
1400
1200
0.008mA No current source or sink by any connected pin
29 mA GNSS Standalone 1Hz Acquisition ( Non-Dpo)
30 mA GNSS Standalone 1Hz Tracking ( Non-DPO)
28 mA GPS Standalone 1Hz Acquisition ( Non-Dpo)
29 mA GPS Standalone 1Hz Tracking ( Non-DPO)
Current Profile at Max Power (23 dBm)
Average Value at Max Power
Current Profile at Low Power (<0 dBm)
Average Value at Low Power
1000
800
600
400
200
0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Current consumption profile of Vbatt + Vbatt_PA in LTE CAT M1 mode with max thoughtput configuration. LTE NB1 mode has a similar current consumption profile.
1VV0301351 Rev.8 Page 27 of 100 2018-09-28
ME910C1 HW User Guide
1800
1600
1400
1200
1000
800
600
400
200
Current Profile at Max Power (33 dBm)
Average Value at Max Power
Current Profile at Low Power (< 0 dBm)
Average Value at Low Power
0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Current consumption profile of Vbatt + Vbatt_PA in GPRS mode with 1TX+1RX
configuration
NOTE: The reported LTE CAT M1 values are an average among all
the product variants and bands for each network wireless technology.
The support of specific network wireless technology depends on
product variant configuration.
NOTE: The electrical design for the Power supply should be made
ensuring it will be capable of a peak current output of at least:
0.6 A for LTE mode (3.80V supply).
2A for GPRS mode (3.80V supply).
1VV0301351 Rev.8 Page 28 of 100 2018-09-28
ME910C1 HW User Guide
General Design Rules
The principal guidelines for the Power Supply Design embrace three different design
steps:
•
the electrical design of the power supply
•
the thermal design
•
the PCB layout
4.3.1. Electrical Design Guidelines of the power supply
The electrical design of the power supply depends strongly from the power source where
this power is drained. We will distinguish them into three categories:
•
+5V input (typically PC internal regulator output)
•
+12V input (typically automotive)
•
Battery
4.3.1.1. +5V Source Power Supply Design Guidelines
•
The desired output for the power supply is 3.8V, hence there's not a big difference
between the input source and the desired output and a linear regulator can be used.
A switching power supply will not be suited because of the low drop out
requirements.
•
When using a linear regulator, a proper heat sink shall be provided in order to
dissipate the power generated.
•
A Bypass low ESR capacitor of adequate capacity must be provided in order to cut
the current absorption peaks close to the Module, a 100μF capacitor is usually
suited.
•
Make sure the low ESR capacitor on the power supply output rated at least 10V.
1VV0301351 Rev.8 Page 29 of 100 2018-09-28
ME910C1 HW User Guide
An example of linear regulator with 5V input is:
Guidelines
4.3.1.2. +12V Source Power Supply Design Guidelines
•
The desired output for the power supply is 3.8V, hence due to the big difference
between the input source and the desired output, a linear regulator is not suited and
shall not be used. A switching power supply will be preferable because of its better
efficiency.
•
When using a switching regulator, a 500kHz or more switching frequency regulator
is preferable because of its smaller inductor size and its faster transient response.
This allows the regulator to respond quickly to the current peaks absorption.
•
In any case the frequency and Switching design selection is related to the
application to be developed due to the fact the switching frequency could also
generate EMC interferences.
•
For car PB battery the input voltage can rise up to 15,8V and this should be kept in
mind when choosing components: all components in the power supply must
withstand this voltage.
•
A Bypass low ESR capacitor of adequate capacity must be provided in order to cut
the current absorption peaks, a 100μF capacitor is usually suited.
•
Make sure the low ESR capacitor on the power supply output is rated at least 10V.
•
For Car applications a spike protection diode should be inserted close to the power
input, in order to clean the supply from spikes.
1VV0301351 Rev.8 Page 30 of 100 2018-09-28
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