This document describes the features and the system integration of
TOBY-L2 and MPCI-L2 series multi-mode cellular modules.
These modules are a complete and cost efficient LTE/3G/2G solution
offering up to 150 Mb/s download and 50 Mb/s upload data rates,
covering up to six LTE bands, up to five WCDMA/DC-HSPA+ bands and
up to four GSM/EGPRS bands in the compact TOBY LGA form factor of
TOBY-L2 modules or in the industry standard PCI Express Mini Card
form factor of MPCI-L2 modules.
TOBY-L2 series
www.u-blox.com
UBX-13004618 - R26
MPCI-L2 series
TOBY-L2 and MPCI-L2 series
LTE/DC-HSPA+/EGPRS modules
System Integration Manual
TOBY-L2 and MPCI-L2 series - System Integration Manual
Document Information
Title
TOBY-L2 and MPCI-L2 series
Subtitle
LTE/DC-HSPA+/EGPRS modules
Document type
System Integration Manual
Document number
UBX-13004618
Revision and date
R26
25-May-2018
Disclosure restriction
Product Status
Corresponding content status
Functional Sample
Draft
For functional testing. Revised and supplementary data will be published later.
In Development /
Prototype
Objective Specification
Target values. Revised and supplementary data will be published later.
Engineering Sample
Advance Information
Data based on early testing. Revised and supplementary data will be published later.
Initial Production
Early Prod. Information
Data from product verification. Revised and supplementary data may be published later.
Mass Production /
End of Life
Production Information
Final product specification.
UBX-13004618 - R26
Page 2 of 162
This document applies to the following products:
Name
Type number
Modem version
Application version
PCN reference
Product status
TOBY-L200
TOBY-L200-00S-00
09.71
A01.15
UBX-14044437
Obsolete
TOBY-L200-00S-01
09.71
A01.30
UBX-16026448
Obsolete
TOBY-L200-02S-00
15.90
A01.00
UBX-15029946
Obsolete
TOBY-L200-02S-01
15.90
A01.10
UBX-16031212
End of Life
TOBY-L200-03S-00
15.90
A01.50
UBX-17022983
Mass Production
TOBY-L201
TOBY-L201-01S-00
09.93
A01.07
UBX-18012849
End of Life
TOBY-L201-02S-00
(for AT&T): 09.93
(for AT&T): A02.50
UBX-17013932
Mass Production
(for VZW): 09.94
(for VZW): A01.02
UBX-17013932
Mass Production
TOBY-L210
TOBY-L210-00S-00
09.71
A01.15
UBX-14044437
Obsolete
TOBY-L210-02S-00
15.63
A01.03
UBX-15029946
Obsolete
TOBY-L210-02S-01
15.63
A01.10
UBX-16031212
End of Life
TOBY-L210-03A-00
15.63
A01.60
UBX-18010749
Mass Production
TOBY-L210-03S-00
15.63
A01.50
UBX-17022983
Mass Production
TOBY-L210-60S-00
09.94
A01.00
UBX-15021694
Obsolete
TOBY-L210-60S-01
09.94
A01.01
UBX-16005471
Obsolete
TOBY-L210-62S-00
16.05
A01.02
UBX-17003573
Initial Production
TOBY-L220
TOBY-L220-02S-00
15.93
A01.00
UBX-16025501
Initial Production
TOBY-L220-62S-00
16.04
A01.00
UBX-17013073
Initial Production
TOBY-L280
TOBY-L280-02S-00
15.63
A01.03
UBX-15029946
Obsolete
TOBY-L280-02S-01
15.63
A01.10
UBX-16031212
End of Life
TOBY-L280-03S-00
15.63
A01.50
UBX-17022983
Mass Production
MPCI-L200
MPCI-L200-00S-00
09.71
A01.15
UBX-14044437
Obsolete
MPCI-L200-00S-01
09.71
A01.30
UBX-16026448
Obsolete
MPCI-L200-02S-00
15.90
A01.00
UBX-15029946
Obsolete
MPCI-L200-02S-01
15.90
A01.10
UBX-16031212
End of Life
MPCI-L200-03S-00
15.90
A01.50
UBX-17022983
Mass Production
MPCI-L201
MPCI-L201-01S-00
09.93
A01.07
UBX-18012849
End of Life
MPCI-L201-02S-00
(for AT&T): 09.93
(for AT&T): A02.50
UBX-17013932
Mass Production
(for VZW): 09.94
(for VZW): A01.02
UBX-17013932
Mass Production
MPCI-L210
MPCI-L210-00S-00
09.71
A01.15
UBX-14044437
Obsolete
MPCI-L210-02S-00
15.63
A01.03
UBX-15029946
Obsolete
MPCI-L210-02S-01
15.63
A01.10
UBX-16031212
End of Life
MPCI-L210-03S-00
15.63
A01.50
UBX-17022983
Mass Production
MPCI-L210-60S-00
09.94
A01.00
UBX-15021694
Obsolete
MPCI-L210-60S-01
09.94
A01.01
UBX-16005471
Mass Production
MPCI-L220
MPCI-L220-02S-00
15.93
A01.00
UBX-16025501
Initial Production
MPCI-L220-62S-00
16.04
A01.00
UBX-17013073
Initial Production
MPCI-L280
MPCI-L280-02S-00
15.63
A01.03
UBX-15029946
Obsolete
MPCI-L280-02S-01
15.63
A01.10
UBX-16031212
End of Life
MPCI-L280-03S-00
15.63
A01.50
UBX-17022983
Mass Production
TOBY-L2 and MPCI-L2 series - System Integration Manual
u-blox reserves all rights to this document and the information contained herein. Products, names, logos and designs described herein may in
whole or in part be subject to intellectual property rights. Reproduction, use, modification or disclosure to third parties of this document or
any part thereof without the express permission of u-blox is strictly prohibited.
The information contained herein is provided “as is” and u-blox assumes no liability for the use of the information. No warranty, either express
or implied, is given, including but not limited, with respect to the accuracy, correctness, reliability and fitness for a particular purpose of the
information. This document may be revised by u-blox at any time. For most recent documents, please visit www.u-blox.com.
u-blox is a registered trademark of u-blox Holding AG in the EU and other countries. PCI, PCI Express, PCIe, and PCI-SIG are trademarks or
registered trademarks of PCI-SIG. Microsoft and Windows are either registered trademarks or trademarks of Microsoft Corporation in the
United States and/or other countries. All other registered trademarks or trademarks mentioned in this document are property of their respective
owners.
UBX-13004618 - R26 Preface
Page 3 of 162
TOBY-L2 and MPCI-L2 series - System Integration Manual
Preface
u-blox Technical Documentation
As part of our commitment to customer support, u-blox maintains an extensive volume of technical documentation
for our products. In addition to our product-specific technical data sheets, the following manuals are available to
assist u-blox customers in product design and development.
AT Commands Manual: This document provides the description of the AT commands supported by the
u-blox cellular modules.
System Integration Manual: This document provides the description of u-blox cellular modules’ system from
the hardware and the software point of view, it provides hardware design guidelines for the optimal
integration of the cellular modules in the application device and it provides information on how to set up
production and final product tests on application devices integrating the cellular modules.
Application Note: These documents provide guidelines and information on specific hardware and/or
software topics on u-blox cellular modules. See Related documents for a list of Application Notes related to
your Cellular Module.
How to use this Manual
The TOBY-L2 and MPCI-L2 series System Integration Manual provides the necessary information to successfully
design and configure the u-blox cellular modules.
This manual has a modular structure. It is not necessary to read it from the beginning to the end.
The following symbols are used to highlight important information within the manual:
An index finger points out key information pertaining to module integration and performance.
A warning symbol indicates actions that could negatively impact or damage the module.
Questions
If you have any questions about u-blox Cellular Integration:
Read this manual carefully.
Contact our information service on the homepage http://www.u-blox.com/
Technical Support
Worldwide Web
Our website (http://www.u-blox.com/) is a rich pool of information. Product information, technical documents can
be accessed 24h a day.
By E-mail
Contact the closest Technical Support office by email. Use our service pool email addresses rather than any personal
email address of our staff. This makes sure that your request is processed as soon as possible. You will find the
contact details at the end of the document.
Helpful Information when Contacting Technical Support
When contacting Technical Support, have the following information ready:
Module type (TOBY-L200) and firmware version
Module configuration
Clear description of your question or the problem
A short description of the application
Your complete contact details
UBX-13004618 - R26 Preface
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TOBY-L2 and MPCI-L2 series - System Integration Manual
1.15.16 Power saving ............................................................................................................................... 69
TOBY-L2 and MPCI-L2 series - System Integration Manual
1 System description
1.1 Overview
TOBY-L2 and MPCI-L2 series comprises LTE/3G/2G multi-mode modules supporting up to six LTE bands, up to five
UMTS/DC-HSPA+ bands and up to four GSM/(E)GPRS bands for voice and/or data transmission as following:
TOBY-L200, TOBY-L201, MPCI-L200 and MPCI-L201 are designed primarily for operation in America
TOBY-L210 and MPCI-L210 are designed primarily for operation in Europe, Asia and other countries
TOBY-L220 and MPCI-L220 are designed primarily for operation in Japan
TOBY-L280 and MPCI-L280 are designed primarily for operation in Asia and Oceania
TOBY-L2 and MPCI-L2 series are designed in two different form-factors suitable for applications as following:
TOBY-L2 modules are designed in the small TOBY 152-pin Land Grid Array form-factor (35.6 x 24.8 mm), easy
to integrate in compact designs and form-factor compatible with the u-blox cellular module families: this
allows customers to take the maximum advantage of their hardware and software investments, and provides
very short time-to-market.
The modules are the perfect choice for consumer fixed-wireless terminals, mobile routers and gateways, and
applications requiring video streaming. They are also optimally suited for industrial (M2M) applications, such
as remote access to video cameras, digital signage, telehealth, and security and surveillance systems
MPCI-L2 modules are designed in the industry standard PCI Express Full-Mini Card form-factor (51 x 30 mm)
easy to integrate into industrial and consumer applications and also ideal for manufacturing of small series.
Typical applications are industrial computing, ruggedized terminals, video communications, wireless routers,
alarm panels and surveillance, digital signage and payment systems.
With LTE Category 4 data rates at up to 150 Mb/s (down-link) and 50 Mb/s (up-link), the TOBY-L2 and MPCI-L2
series modules are ideal for applications requiring the highest data-rates and high-speed internet access.
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TOBY-L2 and MPCI-L2 series - System Integration Manual
Module
LTE
UMTS
GSM
Interfaces
Audio
Features
Grade
LTE FDD category Bands HSDPA category
HSUPA catego
ry
Bands
GPRS/EDGE multi
-slot class
Bands UART USB 2.0 SDIO (Master) DDC (I
2
C)
GPIOs Analog audio Digital audio Network indication Antenna supervisor MIMO 2x2 / Rx Diversity Embedded TCP/UDP stack Embedded HTTP,FTP FOTA Dual stack IPv4/IPv6 Standard Profe
ssional
Automotive
TOBY-L200
4
2,4,5
7,17
24
6
850/900
AWS
1900/2100
12
Quad
♦ ● ♦ ♦ ♦ ♦ ● ♦ ● ♦ ♦ ♦
●
TOBY-L201
4
2,4,5
13,17
24 6 850/1900
●
● ♦
♦
● ♦ ● ● ● ● ●
TOBY-L210
4
1,3,5
7,8,20
24
6
850/900
1900/2100
12
Quad
♦
●
■ ■ ■ ■ ● ■ ● ■ ■ ■
●
TOBY-L2201
4
1,3,5
8,19
24
6
850/900
2100
● ● ● ● ●
▲
● ● ● ● ● ● ●
TOBY-L280
4
1,3,5
7,8,28
24
6
850/900
1900/2100
12
Quad
●
●
●
●
●
● ● ● ● ● ● ●
●
MPCI-L200
4
2,4,5
7,17
24
6
850/900
AWS
1900/2100
12
Quad
● ● ● ♦ ♦ ♦
●
MPCI-L201
4
2,4,5
13,17
24 6 850/1900
● ● ● ● ● ●
●
MPCI-L210
4
1,3,5
7,8,20
24
6
850/900
1900/2100
12
Quad
● ●
●
■■■
●
MPCI-L2201
4
1,3,5
8,19
24
6
850/900
2100
● ● ● ● ● ●
●
MPCI-L280
4
1,3,5
7,8,28
24
6
850/900
1900/2100
12
Quad
● ● ● ● ● ●
●
● = supported by all product versions
♦ = supported by all product versions except versions “00”,”01”
■ = supported by all product versions except versions “00”,”60”
▲ = supported by all product versions except versions “62”
1
2
3
Table 1 summarizes the TOBY-L2 and MPCI-L2 series main features and interfaces.
Table 1: TOBY-L2 and MPCI-L2 series main features summary
TOBY-L2 modules provide Voice over LTE (VoLTE)2 as well as Circuit-Switched-Fall-Back (CSFB)3 audio capability.
Table 2 reports a summary of cellular radio access technologies characteristics and features of the modules.
TOBY-L220-62S and MPCI-L220-62S product versions do not support UMTS Radio Access Technology
Not supported by “00”, “01”, “02”, “03”, “60” and “62” product versions.
Not supported by “00”, “01”, “60”, TOBY-L201-02S and TOBY-L220-62S product versions.
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4G LTE
3G UMTS/HSDPA/HSUPA
2G GSM/GPRS/EDGE
3GPP Release 9
Long Term Evolution (LTE)
Evolved Uni.Terrestrial Radio Access (E-UTRA)
Frequency Division Duplex (FDD)
DL Multi-Input Multi-Output (MIMO) 2 x 2
3GPP Release 8
Dual-Cell HS Packet Access (DC-HSPA+)
UMTS Terrestrial Radio Access (UTRA)
Frequency Division Duplex (FDD)
DL Rx diversity
3GPP Release 8
Enhanced Data rate GSM Evolution (EDGE)
GSM EGPRS Radio Access (GERA)
Time Division Multiple Access (TDMA)
DL Advanced Rx Performance (DARP) Phase 1
Band support4:
TOBY-L200 / MPCI-L200:
Band 17 (700 MHz)
Band 5 (850 MHz)
Band 4 (AWS, i.e. 1700 MHz)
Band 2 (1900 MHz)
Band 7 (2600 MHz)
TOBY-L201 / MPCI-L201:
Band 17 (700 MHz)
Band 13 (750 MHz)
Band 5 (850 MHz)
Band 4 (AWS, i.e. 1700 MHz)
Band 2 (1900 MHz)
TOBY-L210 / MPCI-L210:
Band 20 (800 MHz)
Band 5 (850 MHz)
Band 8 (900 MHz)
Band 3 (1800 MHz)
Band 1 (2100 MHz)
Band 7 (2600 MHz)
TOBY-L220 / MPCI-L220:
Band 19 (850 MHz)
Band 5 (850 MHz)
Band 8 (900 MHz)
Band 3 (1800 MHz)
Band 1 (2100 MHz)
TOBY-L280 / MPCI-L280:
Band 28 (750 MHz)
Band 5 (850 MHz)
Band 8 (900 MHz)
Band 3 (1800 MHz)
Band 1 (2100 MHz)
Band 7 (2600 MHz)
Band support:
TOBY-L200 / MPCI-L200:
Band 5 (850 MHz)
Band 8 (900 MHz)
Band 4 (AWS, i.e. 1700 MHz)
Band 2 (1900 MHz)
Band 1 (2100 MHz)
TOBY-L201 / MPCI-L201:
Band 5 (850 MHz)
Band 2 (1900 MHz)
TOBY-L210 / MPCI-L210:
Band 5 (850 MHz)
Band 8 (900 MHz)
Band 2 (1900 MHz)
Band 1 (2100 MHz)
TOBY-L220
5
/ MPCI-L2205:
Band 19 (850 MHz)
Band 8 (900 MHz)
Band 1 (2100 MHz)
TOBY-L280 / MPCI-L280:
Band 5 (850 MHz)
Band 8 (900 MHz)
Band 2 (1900 MHz)
Band 1 (2100 MHz)
Class 4 (33 dBm) for GSM/E-GSM bands
Class 1 (30 dBm) for DCS/PCS bands
EDGE (8-PSK) Power Class
Class E2 (27 dBm) for GSM/E-GSM bands
Class E2 (26 dBm) for DCS/PCS bands
Data rate
LTE category 4:
up to 150 Mb/s DL, 50 Mb/s UL
Data rate
xxxx-L200 / xxxx-L201:
HSDPA cat.14, up to 21 Mb/s DL
6
HSUPA cat.6, up to 5.6 Mb/s UL
xxxx-L210 / xxxx-L220 / xxxx-L280:
HSDPA cat.24, up to 42 Mb/s DL
HSUPA cat.6, up to 5.6 Mb/s UL
Data rate7
GPRS multi-slot class 12
8
, CS1-CS4,
up to 85.6 kb/s DL/UL
EDGE multi-slot class 128, MCS1-MCS9
up to 236.8 kb/s DL/UL
4
5
6
7
8
Table 2: TOBY-L2 and MPCI-L2 series LTE, 3G and 2G characteristics summary
TOBY-L2 and MPCI-L2 series modules support all E-UTRA channel bandwidths for each operating band according to 3GPP TS 36.521-1 [23]
TOBY-L220-62S and MPCI-L220-62S product versions do not support 3G Radio Access Technology
HSDPA category 24 capable
GPRS/EDGE multi-slot class determines the number of timeslots available for upload and download and thus the speed at which data can be
transmitted and received, with higher classes typically allowing faster data transfer rates.
GPRS/EDGE multi-slot class 12 implies a maximum of 4 slots in DL (reception) and 4 slots in UL (transmission) with 5 slots in total.
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Cellular
Base-band
Processor
Memory
Power Management Unit
26 MHz
32.768 kHz
ANT1
RF
Transceiver
ANT2
V_INT (I/O)
V_BCKP (RTC)
VCC (Supply)
SIM
USB
GPIO
Power On
External Reset
PAs
LNAsFilters
Filters
Duplexer
Filters
PAs
LNAsFilters
Filters
Duplexer
Filters
LNAsFiltersFilters
LNAsFiltersFilters
Switch
Switch
DDC(I2C)
SDIO
UART
Digital audio (I2S)
ANT_DET
Host Select
ANT1
SIM
USB
W_DISABLE#
TOBY-L2
series
Signal
Conditioning
ANT2
PERST#
LED_WWAN#
U.FL
U.FL
3.3Vaux (Supply)
Boost
Converter
VCC
1.2 Architecture
Figure 1 summarizes the internal architecture of TOBY-L2 series modules.
Figure 1: TOBY-L2 series block diagram
As described in the Figure 2, each MPCI-L2 series module integrates one TOBY-L2 series module:
The MPCI-L200 integrates a TOBY-L200 module
The MPCI-L201 integrates a TOBY-L201 module
The MPCI-L210 integrates a TOBY-L210 module
The MPCI-L220 integrates a TOBY-L220 module
The MPCI-L280 integrates a TOBY-L280 module
The TOBY-L2 module represents the core of the device, providing the related LTE/3G/2G modem and processing
functionalities. Additional signal conditioning circuitry is implemented for PCI Express Mini Card compliance, and
two UF.L connectors are available for easy antenna integration.
Figure 2: MPCI-L2 series block diagram
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TOBY-L2 and MPCI-L2 series - System Integration Manual
1.2.1 Internal blocks
As described in Figure 2, each MPCI-L2 series module integrates one TOBY-L2 series module, which consists of the
following internal sections: RF, baseband and power management.
RF section
The RF section is composed of RF transceiver, PAs, LNAs, crystal oscillator, filters, duplexers and RF switches.
Tx signal is pre-amplified by RF transceiver, then output to the primary antenna input/output port (ANT1) of the
module via power amplifier (PA), SAW band pass filters band, specific duplexer and antenna switch.
Dual receiving paths are implemented according to LTE Down-Link MIMO 2 x 2 and 3G Receiver Diversity radio
technologies supported by the modules as LTE category 4 and HSDPA category 24 User Equipments: incoming
signals are received through the primary (ANT1) and the secondary (ANT2) antenna input ports which are
connected to the RF transceiver via specific antenna switch, diplexer, duplexer, LNA, SAW band pass filters.
RF transceiver performs modulation, up-conversion of the baseband I/Q signals for Tx, down-conversion and
demodulation of the dual RF signals for Rx. The RF transceiver contains:
Automatically gain controlled direct conversion Zero-IF receiver,
Highly linear RF demodulator / modulator capable GMSK, 8-PSK, QPSK, 16-QAM, 64-QAM,
Fractional-N Sigma-Delta RF synthesizer,
VCO.
Power Amplifiers (PA) amplify the Tx signal modulated by the RF transceiver
RF switches connect primary (ANT1) and secondary (ANT2) antenna ports to the suitable Tx / Rx path
Low Noise Amplifiers (LNA) enhance the received sensitivity
SAW duplexers separate the Tx and Rx signal paths and provide RF filtering
SAW band pass filters enhance the rejection of out-of-band signals
26 MHz crystal oscillator generates the clock reference in active-mode or connected-mode.
Baseband and power management section
The Baseband and Power Management section is composed of the following main elements:
A mixed signal ASIC, which integrates
Microprocessor for control functions
DSP core for LTE/3G/2G Layer 1 and digital processing of Rx and Tx signal paths
Memory interface controller
Dedicated peripheral blocks for control of the USB, SIM and GPIO digital interfaces
Analog front end interfaces to RF transceiver ASIC
Memory system, which includes NAND flash and LPDDR
Voltage regulators to derive all the subsystem supply voltages from the module supply input VCC
Voltage sources for external use: V_BCKP and V_INT (not available on MPCI-L2 series modules)
Hardware power on
Hardware reset
Low power idle-mode support
32.768 kHz crystal oscillator to provide the clock reference in the low power idle-mode, which can be set by
enable power saving configuration using the AT+UPSV command.
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Function
Pin Name
Pin No
I/O
Description
Remarks
Power
VCC
70,71,72
I
Module supply input
VCC pins are internally connected each other.
VCC supply circuit affects the RF performance and
compliance of the device integrating the module with
applicable required certification schemes.
See section 1.5.1 for functional description / requirements.
See section 2.2.1 for external circuit design-in.
GND pins are internally connected each other.
External ground connection affects the RF and thermal
performance of the device.
See section 1.5.1 for functional description.
See section 2.2.1 for external circuit design-in.
V_BCKP
3
I/O
RTC supply
input/output
V_BCKP = 3.0 V (typical) generated by internal regulator
when valid VCC supply is present.
See section 1.5.2 for functional description.
See section 2.2.2 for external circuit design-in.
V_INT
5
O
Generic digital
interfaces supply
output
V_INT = 1.8 V (typical) generated by internal regulator
when the module is switched on.
Test-Point for diagnostic access is recommended.
See section 1.5.3 for functional description.
See section 2.2.3 for external circuit design-in.
System
PWR_ON
20 I Power-on input
Internal active pull-up to the VCC enabled.
See section 1.6.1 for functional description.
See section 2.3.1 for external circuit design-in.
RESET_N
23 I External reset input
Internal active pull-up to the VCC enabled.
Test-Point for diagnostic access is recommended.
See section 1.6.3 for functional description.
See section 2.3.2 for external circuit design-in.
HOST_SELECT0
26
I
Selection of module
configuration by the
host processor
Not supported by all the product versions.
See section 1.6.4 for functional description.
See section 2.3.3 for external circuit design-in.
HOST_SELECT1
62
I
Selection of module
configuration by the
host processor
Not supported by all the product versions.
See section 1.6.4 for functional description.
See section 2.3.3 for external circuit design-in.
Antennas
ANT1
81
I/O
Primary antenna
Main Tx / Rx antenna interface.
50 nominal characteristic impedance.
Antenna circuit affects the RF performance and application
device compliance with required certification schemes.
See section 1.7 for functional description / requirements.
See section 2.4 for external circuit design-in.
ANT2
87 I Secondary antenna
Rx only for MIMO 2x2 and Rx diversity.
50 nominal characteristic impedance.
Antenna circuit affects the RF performance and application
device compliance with required certification schemes.
See section 1.7 for functional description / requirements
See section 2.4 for external circuit design-in.
ANT_DET
75 I Antenna detection
Not supported by “00”, “01”, “60” product versions.
See section 1.7.2 for functional description.
See section 2.4.2 for external circuit design-in.
1.3 Pin-out
1.3.1 TOBY-L2 series pin assignment
Table 3 lists the pin-out of the TOBY-L2 series modules, with pins grouped by function.
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Function
Pin Name
Pin No
I/O
Description
Remarks
SIM
VSIM
59 O SIM supply output
VSIM = 1.8 V / 3 V output as per the connected SIM type.
See section 1.8 for functional description.
See section 2.5 for external circuit design-in.
SIM_IO
57
I/O
SIM data
Data input/output for 1.8 V / 3 V SIM
Internal 4.7 k pull-up to VSIM.
See section 1.8 for functional description.
See section 2.5 for external circuit design-in.
SIM_CLK
56 O SIM clock
3.43 MHz clock output for 1.8 V / 3 V SIM
See section 1.8 for functional description.
See section 2.5 for external circuit design-in.
SIM_RST
58 O SIM reset
Reset output for 1.8 V / 3 V SIM
See section 1.8 for functional description.
See section 2.5 for external circuit design-in.
USB
VUSB_DET
4 I USB detect input
Leave unconnected: VUSB_DET functionality is not supported.
See section 1.9.1 for functional description.
See section 2.6.1 for external circuit design-in.
USB_D-
27
I/O
USB Data Line D-
USB interface for AT commands, data communication,
FOAT, FW update by u-blox EasyFlash tool and diagnostic.
90 nominal differential impedance (Z0)
30 nominal common mode impedance (Z
CM
)
Pull-up or pull-down resistors and external series resistors as
required by the USB 2.0 specifications [7] are part of the
USB pad driver and need not be provided externally.
If the USB interface is not used by the Application Processor,
Test-Point for diagnostic / FW update access is recommended.
See section 1.9.1 for functional description.
See section 2.6.1 for external circuit design-in.
USB_D+
28
I/O
USB Data Line D+
USB interface for AT commands, data communication,
FOAT, FW update by u-blox EasyFlash tool and diagnostic.
90 nominal differential impedance (Z0)
30 nominal common mode impedance (Z
CM
)
Pull-up or pull-down resistors and external series resistors as
required by the USB 2.0 specifications [7] are part of the
USB pad driver and need not be provided externally.
If the USB interface is not used by the Application Processor,
Test-Point for diagnostic / FW update access is recommended.
See section 1.9.1 for functional description.
See section 2.6.1 for external circuit design-in.
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Function
Pin Name
Pin No
I/O
Description
Remarks
UART
RXD
17 O UART data output
Not supported by “00” product versions.
1.8 V output, Circuit 104 (RXD) in ITU-T V.24,
for AT command, data communication, FOAT, diagnostic.
Test-Point and series 0 for diagnostic access recommended.
See section 1.9.2 for functional description.
See section 2.6.2 for external circuit design-in.
TXD
16 I UART data input
Not supported by “00” product versions.
1.8 V input, Circuit 103 (TXD) in ITU-T V.24,
for AT command, data communication, FOAT, diagnostic.
Internal active pull-up to V_INT.
Test-Point and series 0 for diagnostic access recommended.
See section 1.9.2 for functional description.
See section 2.6.2 for external circuit design-in.
CTS
15
O
UART clear to send
output
Not supported by “00” product versions.
1.8 V output, Circuit 106 (CTS) in ITU-T V.24.
Test-Point and series 0 for diagnostic access recommended.
See section 1.9.2 for functional description.
See section 2.6.2 for external circuit design-in.
RTS
14
I
UART ready to send
input
Not supported by “00” product versions.
1.8 V input, Circuit 105 (RTS) in ITU-T V.24.
Internal active pull-up to V_INT.
Test-Point and series 0 for diagnostic access recommended.
See section 1.9.2 for functional description.
See section 2.6.2 for external circuit design-in.
DSR
10
O /
I/O
UART data set ready
output / GPIO
UART DSR not supported by “00” product versions;
GPIO not supported by “00”, “01”, “60” versions.
1.8 V, Circuit 107 in ITU-T V.24, configurable as GPIO.
Test-Point and series 0 for diagnostic access recommended.
See section 1.9.2 and 1.11 for functional description.
See section 2.6.2 and 2.8 for external circuit design-in.
RI
11
O /
I/O
UART ring indicator
output / GPIO
RI not supported by “00” product versions;
GPIO not supported by “00”, “01”, “60” versions.
1.8 V, Circuit 125 in ITU-T V.24, configurable as GPIO.
Test-Point and series 0 for diagnostic access recommended.
See section 1.9.2 and 1.11 for functional description.
See section 2.6.2 and 2.8 for external circuit design-in.
DTR
13
I /
I/O
UART data terminal
ready input / GPIO
UART DTR not supported by “00” product versions;
GPIO not supported by “00”, “01”, “60” versions.
1.8 V, Circuit 108/2 in ITU-T V.24, configurable as GPIO.
Internal active pull-up to V_INT when configured as DTR.
Test-Point and series 0 for diagnostic access recommended.
See section 1.9.2 and 1.11 for functional description.
See section 2.6.2 and 2.8 for external circuit design-in.
DCD
12
O /
I/O
UART data carrier
detect output / GPIO
UART DCD not supported by “00” product versions;
GPIO not supported by “00”, “01”, “60” versions.
1.8 V, Circuit 109 in ITU-T V.24, configurable as GPIO.
Test-Point and series 0 for diagnostic access recommended.
See section 1.9.2 and 1.11 for functional description.
See section 2.6.2 and 2.8 for external circuit design-in.
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Function
Pin Name
Pin No
I/O
Description
Remarks
DDC
SCL
54 O I2C bus clock line
Not supported by versions ‘00’, ‘01’, ‘60’, TOBY-L201-02S.
1.8 V open drain, for communication with I2C-slave devices.
External pull-up required.
See section 1.9.3 for functional description.
See section 2.6.3 for external circuit design-in.
SDA
55
I/O
I2C bus data line
Not supported by versions ‘00’, ‘01’, ‘60’, TOBY-L201-02S.
1.8 V open drain, for communication with I2C-slave devices.
External pull-up required.
See section 1.9.3 for functional description.
See section 2.6.3 for external circuit design-in.
SDIO
SDIO_D0
66
I/O
SDIO serial data [0]
Not supported by “00”, “01”, “60” product versions.
SDIO interface for communication with u-blox Wi-Fi module
See section 1.9.4 for functional description.
See section 2.6.4 for external circuit design-in.
SDIO_D1
68
I/O
SDIO serial data [1]
Not supported by “00”, “01”, “60” product versions.
SDIO interface for communication with u-blox Wi-Fi module
See section 1.9.4 for functional description.
See section 2.6.4 for external circuit design-in.
SDIO_D2
63
I/O
SDIO serial data [2]
Not supported by “00”, “01”, “60” product versions.
SDIO interface for communication with u-blox Wi-Fi module
See section 1.9.4 for functional description.
See section 2.6.4 for external circuit design-in.
SDIO_D3
67
I/O
SDIO serial data [3]
Not supported by “00”, “01”, “60” product versions.
SDIO interface for communication with u-blox Wi-Fi module
See section 1.9.4 for functional description.
See section 2.6.4 for external circuit design-in.
SDIO_CLK
64 O SDIO serial clock
Not supported by “00”, “01”, “60” product versions.
SDIO interface for communication with u-blox Wi-Fi module
See section 1.9.4 for functional description.
See section 2.6.4 for external circuit design-in.
SDIO_CMD
65
I/O
SDIO command
Not supported by “00”, “01”, “60” product versions.
SDIO interface for communication with u-blox Wi-Fi module
See section 1.9.4 for functional description.
See section 2.6.4 for external circuit design-in.
Audio
I2S_TXD
51
O /
I/O
I2S transmit data /
GPIO
I2S not supported by vers. ‘00’, ‘01’, ‘60’, ‘L201-02’,‘L220-62’GPIO not supported by versions ‘00’, ‘01’, ‘60’.
I2S transmit data output, alternatively configurable as GPIO.
See sections 1.10 and 1.11 for functional description.
See sections 2.7 and 2.8 for external circuit design-in.
I2S_RXD
53
I /
I/O
I2S receive data /
GPIO
I2S not supported by vers. ‘00’, ‘01’, ‘60’, ‘L201-02’, ‘L220-62’GPIO not supported by versions ‘00’, ‘01’, ‘60’.
I2S receive data input, alternatively configurable as GPIO.
See sections 1.10 and 1.11 for functional description.
See sections 2.7 and 2.8 for external circuit design-in.
I2S_CLK
52
I/O /
I/O
I2S clock /
GPIO
I2S not supported by vers. ‘00’, ‘01’, ‘60’, ‘L201-02’, ‘L220-62’
GPIO not supported by versions ‘00’, ‘01’, ‘60’.
I2S serial clock, alternatively configurable as GPIO.
See sections 1.10 and 1.11 for functional description.
See sections 2.7 and 2.8 for external circuit design-in.
I2S_WA
50
I/O /
I/O
I2S word alignment /
GPIO
I2S not supported by vers. ‘00’, ‘01’, ‘60’, ‘L201-02’, ‘L220-62’GPIO not supported by versions ‘00’, ‘01’, ‘60’.
I2S word alignment, alternatively configurable as GPIO.
See sections 1.10 and 1.11 for functional description.
See sections 2.7 and 2.8 for external circuit design-in.
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Function
Pin Name
Pin No
I/O
Description
Remarks
GPIO
GPIO1
21
I/O
GPIO
Not supported by “00”, “01”, “60” product versions,
providing WWAN status indication on GPIO1 pin.
1.8 V GPIO with alternatively configurable functions.
See section 1.11 for functional description.
See section 2.8 for external circuit design-in.
GPIO2
22
I/O
GPIO
Not supported by “00”, “01”, “60” product versions.
1.8 V GPIO with alternatively configurable functions.
See section 1.11 for functional description.
See section 2.8 for external circuit design-in.
GPIO3
24
I/O
GPIO
Not supported by “00”, “01”, “60” product versions.
1.8 V GPIO with alternatively configurable functions.
See section 1.11 for functional description.
See section 2.8 for external circuit design-in.
GPIO4
25
I/O
GPIO
Not supported by “00”, “01”, “60” product versions.
1.8 V GPIO with alternatively configurable functions.
See section 1.11 for functional description.
See section 2.8 for external circuit design-in.
GPIO5
60
I/O
GPIO
Not supported by “00”, “01”, “60” product versions.
1.8 V GPIO with alternatively configurable functions.
See section 1.11 for functional description.
See section 2.8 for external circuit design-in.
GPIO6
61
I/O
GPIO
Not supported by “00”, “01”, “60” product versions.
1.8 V GPIO with alternatively configurable functions.
See section 1.11 for functional description.
See section 2.8 for external circuit design-in.
Reserved
RSVD
6
N/A
Reserved pin
This pin must be connected to ground.
See section 2.10
GND pins are internally connected each other.
External ground connection affects the RF and thermal
performance of the device.
See section 1.5.1 for functional description.
See section 2.2.1 for external circuit design-in.
Auxiliary
Signals
PERST#
22 I External reset input
Internal 45 k pull-up to 3.3 V supply.
See section 1.6.3 for functional description.
See section 2.3.2 for external circuit design-in.
Antennas
ANT1
U.FL
I/O
Primary antenna
Main Tx / Rx antenna interface.
50 nominal characteristic impedance.
Antenna circuit affects the RF performance and
compliance of the device integrating the module with
applicable required certification schemes.
See section 1.7 for functional description / requirements.
See section 2.4 for external circuit design-in.
ANT2
U.FL I Secondary antenna
Rx only for MIMO 2x2 and Rx diversity.
50 nominal characteristic impedance.
Antenna circuit affects the RF performance and
compliance of the device integrating the module with
applicable required certification schemes.
See section 1.7 for functional description / requirements
See section 2.4 for external circuit design-in.
SIM
UIM_PWR
8 O SIM supply output
UIM_PWR = 1.8 V / 3 V automatically generated
according to the connected SIM type.
See section 1.8 for functional description.
See section 2.5 for external circuit design-in.
UIM_DATA
10
I/O
SIM data
Data input/output for 1.8 V / 3 V SIM
Internal 4.7 k pull-up to UIM_PWR.
See section 1.8 for functional description.
See section 2.5 for external circuit design-in.
UIM_CLK
12 O SIM clock
3.43 MHz clock output for 1.8 V / 3 V SIM
See section 1.8 for functional description.
See section 2.5 for external circuit design-in.
UIM_RESET
14 O SIM reset
Reset output for 1.8 V / 3 V SIM
See section 1.8 for functional description.
See section 2.5 for external circuit design-in.
1.3.2 MPCI-L2 series pin assignment
Table 4 lists the pin-out of the MPCI-L2 series modules, with pins grouped by function.
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Function
Pin Name
Pin No
I/O
Description
Remarks
USB
USB_D-
36
I/O
USB Data Line D-
USB interface for AT commands, data communication,
FOAT, FW update by u-blox EasyFlash tool and diagnostic.
90 nominal differential impedance (Z0)
30 nominal common mode impedance (Z
CM
)
Pull-up or pull-down resistors and external series resistors
as required by the USB 2.0 specifications [7] are part of the
USB pad driver and need not be provided externally.
See section 1.9.1 for functional description.
See section 2.6.1 for external circuit design-in.
USB_D+
38
I/O
USB Data Line D+
USB interface for AT commands, data communication,
FOAT, FW update by u-blox EasyFlash tool and diagnostic.
90 nominal differential impedance (Z0)
30 nominal common mode impedance (Z
CM
)
Pull-up or pull-down resistors and external series resistors
as required by the USB 2.0 specifications [7] are part of the
USB pad driver and need not be provided externally.
See section 1.9.1 for functional description.
See section 2.6.1 for external circuit design-in.
Specific
Signals
LED_WWAN#
42 O LED indicator output
Open drain active low output.
See section 1.12 for functional description.
See section 2.9 for external circuit design-in.
W_DISABLE#
20
I
Wireless radio
disable input
Internal 22 k pull-up to 3.3Vaux.
See section 1.12 for functional description.
See section 2.9 for external circuit design-in.
Internally not connected.
See section 1.14 for the description.
Table 4: MPCI-L2 series module pin definition, grouped by function
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General Status
Operating Mode
Definition
Power-down
Not-Powered Mode
VCC or 3.3Vaux supply not present or below operating range: module is switched off.
Power-Off Mode
VCC or 3.3Vaux supply within operating range and module is switched off.
Normal Operation
Idle-Mode
Module processor core runs with 32 kHz reference generated by the internal oscillator.
Active-Mode
Module processor core runs with 26 MHz reference generated by the internal oscillator.
Connected-Mode
RF Tx/Rx data connection enabled and processor core runs with 26 MHz reference.
Operating Mode
Description
Transition between operating modes
Not-Powered
Mode
Module is switched off.
Application interfaces are not accessible.
When VCC or 3.3Vaux supply is removed, the module enters
not-powered mode.
When in not-powered mode, TOBY-L2 modules cannot be switched
on by PWR_ON, RESET_N or RTC alarm and enter active-mode
after applying VCC supply (see 1.6.1).
When in not-powered mode, MPCI-L2 modules cannot be switched
on by RTC alarm and enter active-mode after applying 3.3Vaux
supply (see 1.6.1).
Power-Off Mode
Module is switched off: normal shutdown by
an appropriate power-off event (see 1.6.2).
Application interfaces are not accessible.
MPCI-L2 modules do not support Power-Off
Mode but halt mode (see 1.6.2 and u-blox AT Commands Manual [3], AT+CFUN=127
command).
When the module is switched off by an appropriate power-off event
(see 1.6.2), the module enters power-off mode from active-mode.
When in power-off mode, TOBY-L2 modules can be switched on by
PWR_ON, RESET_N or an RTC alarm.
When in power-off mode, TOBY-L2 modules enter the not-powered
mode after removing VCC supply.
Idle-Mode
Module is switched on with application
interfaces temporarily disabled or suspended:
the module is temporarily not ready to
communicate with an external device by
means of the application interfaces as
configured to reduce the current
consumption.
The module enters the low power idle-mode
whenever possible if power saving is enabled
by AT+UPSV (see u-blox AT Commands Manual [3]) reducing current consumption
(see 1.5.1.5).
With HW flow control enabled and
AT+UPSV=1 or AT+UPSV=3, the UART CTS
line indicates when the UART is enabled (see
1.9.2.3, 1.9.2.4).
With HW flow control disabled, the UART CTS
line is fixed to ON state (see 1.9.2.3).
Power saving configuration is not enabled by
default: it can be enabled by the AT+UPSV
command (see the u-blox AT Commands Manual [3]).
The modules automatically switch from active-mode to low power
idle-mode whenever possible if power saving is enabled (see
sections 1.5.1.5, 1.9.1.4, 1.9.2.4 and u-blox AT Commands Manual
[3], AT+UPSV).
The modules wake up from low power idle-mode to active-mode in
the following events:
Automatic periodic monitoring of the paging channel for the
paging block reception according to network conditions (see
1.5.1.5)
The connected USB host forces a remote wakeup of the
module as USB device (see 1.9.1.4)
Automatic periodic enable of the UART interface to receive /
send data, with AT+UPSV=1 (see 1.9.2.4)
Data received over UART, with HW flow control disabled and
power saving enabled (see 1.9.2.4)
RTS input set ON by the host DTE, with HW flow control
disabled and AT+UPSV=2 (see 1.9.2.4)
DTR input set ON by the host DTE, with AT+UPSV=3 (see
1.9.2.4)
The connected SDIO device forces a wakeup of the module as
SDIO host (see 1.9.4)
A preset RTC alarm occurs (see u-blox AT Commands Manual
[3], AT+CALA)
1.4 Operating modes
TOBY-L2 and MPCI-L2 series modules have several operating modes. The operating modes are defined in Table 5
and described in detail in Table 6, providing general guidelines for operation.
Table 5: TOBY-L2 and MPCI-L2 series modules operating modes definition
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Operating Mode
Description
Transition between operating modes
Active-Mode
Module is switched on with application
interfaces enabled or not suspended: the
module is ready to communicate with an
external device by means of the application
interfaces unless power saving configuration is
enabled by AT+UPSV (see 1.9.1.4, 1.9.2.4 and
u-blox AT Commands Manual [3]).
When the module is switched on by an appropriate power-on event
(see 1.6.1), the module enters active-mode from power-off mode.
If power saving configuration is enabled by the AT+UPSV command,
the module automatically switches from active to idle-mode
whenever possible and the module wakes up from idle to activemode in the events listed above (see idle-mode to active-mode
transition description above).
When a RF Tx/Rx data connection is initiated or when RF Tx/Rx is
required due to a connection previously initiated, the module
switches from active to connected-mode.
Connected-Mode
RF Tx/Rx data connection is in progress.
The module is prepared to accept data signals
from an external device unless power saving
configuration is enabled by AT+UPSV (see
sections 1.9.1.4, 1.9.2.4 and u-blox AT Commands Manual [3]).
When a data connection is initiated, the module enters connectedmode from active-mode.
Connected-mode is suspended if Tx/Rx data is not in progress, due
to connected discontinuous reception and fast dormancy capabilities
of the module and according to network environment settings and
scenario. In such case, the module automatically switches from
connected to active mode and then, if power saving configuration is
enabled by the AT+UPSV command, the module automatically
switches to idle-mode whenever possible. Vice-versa, the module
wakes up from idle to active mode and then connected mode if RF
Tx/Rx is necessary.
When a data connection is terminated, the module returns to the
active-mode.
TOBY-L2 Switch ON:
• Apply VCC
MPCI-L2 Switch ON:
• Apply 3.3Vaux
If power saving is enabled
and there is no activity for
a defined time interval
Any wake up event described
in the module operating
modes summary table above
Incoming/outgoing call or
other dedicated device
network communication
No RF Tx/Rx in progress,
Call terminated,
Communication dropped
TOBY-L2
Switch ON:
• PWR_ON
• RESET_N
• RTC alarm
Not
powered
Power off
ActiveConnectedIdle
TOBY-L2
Switch OFF:
• AT+CPWROFF
• RESET_N
MPCI-L2:
• AT+CFUN=127 and
then remove 3.3Vaux
TOBY-L2:
• Remove VCC
Table 6: TOBY-L2 and MPCI-L2 series modules operating modes description
Figure 3 describes the transition between the different operating modes.
Figure 3: TOBY-L2 and MPCI-L2 series modules operating modes transition
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Item
Requirement
Remark
VCC or 3.3Vaux
nominal voltage
Within VCC or 3.3Vaux normal operating range:
See “Supply/Power pins” section in the TOBY-L2 Data
Sheet [1] or in the MPCI-L2 Data Sheet [2].
The modules cannot be switched on if the supply voltage
is below the normal operating range minimum limit.
VCC or 3.3Vaux
voltage during
normal operation
Within VCC or 3.3Vaux extended operating range:
See “Supply/Power pins” section in the TOBY-L2 Data
Sheet [1] or in the MPCI-L2 Data Sheet [2].
The modules may switch off if the supply voltage drops
below the extended operating range minimum limit.
VCC or 3.3Vaux
average current
Support with adequate margin the highest averaged
current consumption value in connected-mode
conditions specified for VCC in TOBY-L2 Data Sheet [1]
or specified for 3.3Vaux in MPCI-L2 Data Sheet [2].
The maximum average current consumption can be
greater than the specified value according to the actual
antenna mismatching, temperature and supply voltage.
Sections 1.5.1.2, 1.5.1.3 and 1.5.1.4 describe current
consumption profiles in 2G, 3G and LTE connected-mode.
VCC or 3.3Vaux
peak current
Support with margin the highest peak current
consumption value in 2G connected-mode conditions
specified for VCC in TOBY-L2 Data Sheet [1] or
specified for 3.3Vaux in MPCI-L2 Data Sheet [2].
The specified maximum peak of current consumption
occurs during GSM single transmit slot in 850/900 MHz
connected-mode, in case of mismatched antenna.
Supply voltage drop values greater than recommended
during 2G TDMA transmission slots directly affect the RF
compliance with applicable certification schemes.
Figure 5 describes supply voltage drop during 2G Tx slots.
VCC or 3.3Vaux
voltage ripple during
RF transmission
Noise in the supply has to be minimized
High supply voltage ripple values during LTE/3G/2G RF
transmissions in connected-mode directly affect the RF
compliance with applicable certification schemes.
Figure 5 describes supply voltage ripple during RF Tx.
VCC or 3.3Vaux
under/over-shoot at
start/end of Tx slots
Absent or at least minimized
Supply voltage under-shoot or over-shoot at the start or
the end of 2G TDMA transmission slots directly affect the
RF compliance with applicable certification schemes.
Figure 5 describes supply voltage under/over-shoot
1.5 Supply interfaces
1.5.1 Module supply input (VCC or 3.3Vaux)
TOBY-L2 modules are supplied via the three VCC pins, and MPCI-L2 modules are supplied via the five 3.3Vaux
pins. All supply voltages used inside the modules are generated from the VCC or the 3.3Vaux supply input by
integrated voltage regulators, including the V_BCKP RTC supply, the V_INT generic digital interface supply, and
the VSIM or UIM_PWR SIM interface supply.
The current drawn by the TOBY-L2 and MPCI-L2 series modules through the VCC or 3.3Vaux pins can vary by
several orders of magnitude depending on radio access technology, operation mode and state. It is important that
the supply source is able to support both the high peak of current consumption during 2G transmission at
maximum RF power level (as described in the section 1.5.1.2) and the high average current consumption during
3G and LTE transmission at maximum RF power level (as described in the sections 1.5.1.3 and 1.5.1.4).
1.5.1.1 VCC or 3.3Vaux supply requirements
Table 7 summarizes the requirements for the VCC or 3.3Vaux modules supply. See section 2.2.1 for suggestions
to properly design a VCC or 3.3Vaux supply circuit compliant with the requirements listed in Table 7.
The supply circuit affects the RF compliance of the device integrating TOBY-L2 and MPCI-L2 series
modules with applicable required certification schemes as well as antenna circuit design.
Compliance is guaranteed if the requirements summarized in the Table 7 are fulfilled.
Table 7: Summary of VCC or 3.3Vaux modules supply requirements
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Time [ms]
RX
slot
unused
slot
unused
slot
TX
slot
unused
slot
unused
slot
MON
slot
unused
slot
RX
slot
unused
slot
unused
slot
TX
slot
unused
slot
unused
slot
MON
slot
unused
slot
GSM frame
4.615 ms
(1 frame = 8 slots)
Current [A]
200 mA
60-120 mA
1900 mA
Peak current depends
on TX power and
actual antenna load
GSM frame
4.615 ms
(1 frame = 8 slots)
60-120 mA
10-40 mA
0.0
1.5
1.0
0.5
2.0
2.5
Time [ms]
undershoot
overshoot
ripple
drop
Voltage [mV]
3.8 V
(typ)
RX
slot
unused
slot
unused
slot
TX
slot
unused
slot
unused
slot
MON
slot
unused
slot
RX
slot
unused
slot
unused
slot
TX
slot
unused
slot
unused
slot
MON
slot
unused
slot
GSM frame
4.615 ms
(1 frame = 8 slots)
GSM frame
4.615 ms
(1 frame = 8 slots)
1.5.1.2 VCC or 3.3Vaux current consumption in 2G connected-mode
When a GSM call is established, the VCC or 3.3Vaux module current consumption is determined by the current
consumption profile typical of the GSM transmitting and receiving bursts.
The peak of current consumption during a transmission slot is strictly dependent on the RF transmitted power,
which is regulated by the network (the current base station). The transmitted power in the transmit slot is also the
more relevant factor for determining the average current consumption.
If the module is transmitting in 2G single-slot mode in the 850 or 900 MHz bands, at the maximum RF power level
(approximately 2 W or 33 dBm in the allocated transmit slot/burst) the current consumption can reach an high
peak (see the “Current consumption” section in the TOBY-L2 Data Sheet [1] or the MPCI-L2 Data Sheet [2]) for
576.9 µs (width of the transmit slot/burst) with a periodicity of 4.615 ms (width of 1 frame = 8 slots/burst), so
with a 1/8 duty cycle according to GSM TDMA (Time Division Multiple Access).
If the module is transmitting in 2G single-slot mode in the 1800 or 1900 MHz bands, the current consumption
figures are quite less high than the one in the low bands, due to 3GPP transmitter output power specifications.
During a GSM call, current consumption is not so significantly high in receiving or in monitor bursts and is low in
the inactive unused bursts.
Figure 4 shows an example of the module current consumption profile versus time in 2G single-slot mode.
Figure 4: VCC or 3.3Vaux current consumption profile versus time during a 2G single-slot call (1 TX slot, 1 RX slot)
Figure 5 illustrates VCC or 3.3Vaux voltage profile versus time during a 2G single-slot call, according to the relative
VCC or 3.3Vaux current consumption profile described in Figure 4.
Figure 5: VCC or 3.3Vaux voltage profile versus time during a 2G single-slot call (1 TX slot, 1 RX slot)
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Time [ms]
RX
slot
unused
slot
TX
slot
TX
slot
TX
slot
TX
slot
MON
slot
unused
slot
RX
slot
unused
slot
TX
slot
TX
slot
TX
slot
TX
slot
MON
slot
unused
slot
GSM frame
4.615 ms
(1 frame = 8 slots)
Current [A]
200mA
60-130mA
Peak current depends
on TX power and
actual antenna load
GSM frame
4.615 ms
(1 frame = 8 slots)
1600 mA
0.0
1.5
1.0
0.5
2.0
2.5
When a GPRS connection is established, more than one slot can be used to transmit and/or more than one slot
can be used to receive. The transmitted power depends on network conditions, which set the peak current
consumption, but following the 3GPP specifications the maximum Tx RF power is reduced if more than one slot is
used to transmit, so the maximum peak of current is not as high as can be in case of a 2G single-slot call.
The multi-slot transmission power can be further reduced by configuring the actual Multi-Slot Power Reduction
profile with the dedicated AT command, AT+UDCONF=40 (see the u-blox AT Commands Manual [3]). This
command is not supported by “00” and “60” product versions.
If the module transmits in GPRS class 12 in the 850 or 900 MHz bands, at the maximum RF power control level,
the current consumption can reach a quite high peak but lower than the one achievable in 2G single-slot mode.
This happens for 2.307 ms (width of the 4 transmit slots/bursts) with a periodicity of 4.615 ms (width of 1 frame
= 8 slots/bursts), so with a 1/2 duty cycle, according to 2G TDMA.
If the module is in GPRS connected mode in the 1800 or 1900 MHz bands, the current consumption figures are
quite less high than the one in the low bands, due to 3GPP transmitter output power specifications.
Figure 6 reports the current consumption profiles in GPRS class 12 connected mode, in the 850 or 900 MHz bands,
with 4 slots used to transmit and 1 slot used to receive.
Figure 6: VCC or 3.3Vaux current consumption profile during a 2G GPRS/EDGE multi-slot connection (4 TX slots, 1 RX slot)
In case of EDGE connections the VCC current consumption profile is very similar to the GPRS current profile, so
the image shown in Figure 6, representing the current consumption profile in GPRS class 12 connected mode, is
valid for the EDGE class 12 connected mode as well.
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Time
[ms]
3G frame
10 ms
(1 frame = 15 slots)
Current [mA]
Current consumption value
depends on TX power and
actual antenna load
170 mA
1 slot
666 µs
850 mA
0
300
200
100
500
400
600
700
1.5.1.3 VCC or 3.3Vaux current consumption in 3G connected mode
During a 3G connection, the module can transmit and receive continuously due to the Frequency Division Duplex
(FDD) mode of operation with the Wideband Code Division Multiple Access (WCDMA).
The current consumption depends on output RF power, which is always regulated by the network (the current
base station) sending power control commands to the module. These power control commands are logically
divided into a slot of 666 µs, thus the rate of power change can reach a maximum rate of 1.5 kHz.
There are no high current peaks as in the 2G connection, since transmission and reception are continuously
enabled due to FDD WCDMA implemented in the 3G that differs from the TDMA implemented in the 2G case.
In the worst scenario, corresponding to a continuous transmission and reception at maximum output power
(approximately 250 mW or 24 dBm), the average current drawn by the module at the VCC pins is considerable
(see the “Current consumption” section in TOBY-L2 Data Sheet [1] or in MPCI-L2 Data Sheet [2]). At the lowest
output RF power (approximately 0.01 µW or –50 dBm), the current drawn by the internal power amplifier is
strongly reduced. The total current drawn by the module at the VCC pins is due to baseband processing and
transceiver activity.
Figure 7 shows an example of current consumption profile of the module in 3G WCDMA/DC-HSPA+ continuous
transmission mode.
Figure 7: VCC or 3.3Vaux current consumption profile versus time during a 3G connection (TX and RX continuously enabled)
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Time
[ms]
Current [mA]
Current consumption value
depends on TX power and
actual antenna load
1 Slot
1 Resource Block
(0.5 ms)
1 LTE Radio Frame
(10 ms)
0
300
200
100
500
400
600
700
1.5.1.4 VCC or 3.3Vaux current consumption in LTE connected-mode
During an LTE connection, the module can transmit and receive continuously due to the Frequency Division Duplex
(FDD) mode of operation used in LTE radio access technology.
The current consumption depends on output RF power, which is always regulated by the network (the current
base station) sending power control commands to the module. These power control commands are logically
divided into a slot of 0.5 ms (time length of one Resource Block), thus the rate of power change can reach a
maximum rate of 2 kHz.
The current consumption profile is similar to that in 3G radio access technology. Unlike the 2G connection mode,
which uses the TDMA mode of operation, there are no high current peaks since transmission and reception are
continuously enabled in FDD.
In the worst scenario, corresponding to a continuous transmission and reception at maximum output power
(approximately 250 mW or 24 dBm), the average current drawn by the module at the VCC pins is considerable
(see the “Current consumption” section in TOBY-L2 Data Sheet [1] or in MPCI-L2 Data Sheet [2]). At the lowest
output RF power (approximately 0.01 µW or –50 dBm), the current drawn by the internal power amplifier is
strongly reduced and the total current drawn by the module at the VCC pins is due to baseband processing and
transceiver activity.
Figure 8 shows an example of the module current consumption profile versus time in LTE connected-mode.
Detailed current consumption values can be found in TOBY-L2 Data Sheet [1] and in MPCI-L2 Data Sheet [2].
Figure 8: VCC or 3.3Vaux current consumption profile versus time during LTE connection (TX and RX continuously enabled)
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~50 ms
IDLE MODEACTIVE MODEIDLE MODE
Active Mode
Enabled
Idle Mode
Enabled
2G case: 0.44-2.09 s
3G case: 0.61-5.09 s
LTE case: 0.27-2.51 s
IDLE MODE
~50 ms
ACTIVE MODE
Time [s]
Current [mA]
Time [ms]
Current [mA]
RX
Enabled
0
100
0
100
1.5.1.5 VCC or 3.3Vaux current consumption in cyclic idle/active mode (power saving enabled)
The power saving configuration is by default disabled, but it can be enabled using the AT+UPSV command (see
the u-blox AT Commands Manual [3]). When power saving is enabled, the module automatically enters the low
power idle-mode whenever possible, reducing current consumption.
During low power idle-mode, the module processor runs with 32 kHz reference clock frequency.
When the power saving configuration is enabled and the module is registered or attached to a network, the
module automatically enters the low power idle-mode whenever possible, but it must periodically monitor the
paging channel of the current base station (paging block reception), in accordance to the 2G/3G/LTE system
requirements, even if connected-mode is not enabled by the application. When the module monitors the paging
channel, it wakes up to the active-mode, to enable the reception of paging block. In between, the module switches
to low power idle-mode. This is known as discontinuous reception (DRX).
The module processor core is activated during the paging block reception, and automatically switches its reference
clock frequency from 32 kHz to the 26 MHz used in active-mode.
The time period between two paging block receptions is defined by the network. This is the paging period
parameter, fixed by the base station through broadcast channel sent to all users on the same serving cell:
In case of 2G radio access technology, the paging period can vary from 470.8 ms (DRX = 2, length of 2 x 51
2G frames = 2 x 51 x 4.615 ms) up to 2118.4 ms (DRX = 9, length of 9 x 51 2G frames = 9 x 51 x 4.615 ms)
In case of 3G radio access technology, the paging period can vary from 640 ms (DRX = 6, i.e. length of 2
6
3G
frames = 64 x 10 ms) up to 5120 ms (DRX = 9, length of 29 3G frames = 512 x 10 ms).
In case of LTE radio access technology, the paging period can vary from 320 ms (DRX = 5, i.e. length of 2
5
LTE
frames = 32 x 10 ms) up to 2560 ms (DRX = 8, length of 28 LTE frames = 256 x 10 ms).
Figure 9 illustrates a typical example of the module current consumption profile when power saving is enabled.
The module is registered with network, automatically enters the low power idle-mode and periodically wakes up
to active-mode to monitor the paging channel for the paging block reception. Detailed current consumption values
can be found in TOBY-L2 Data Sheet [1] and in MPCI-L2 Data Sheet [2].
Figure 9: VCC or 3.3Vaux current consumption profile with power saving enabled and module registered with the network:
the module is in idle-mode and periodically wakes up to active-mode to monitor the paging channel for paging block reception
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ACTIVE MODE
2G case: 0.44-2.09 s
3G case: 0.61-5.09 s
LTE case: 0.32-2.56 s
Paging period
Time [s]
Current [mA]
Time [ms]
Current [mA]
RX
Enabled
0
100
0
100
1.5.1.6 VCC or 3.3Vaux current consumption in fixed active-mode (power saving disabled)
When power saving is disabled, the module does not automatically enter the low power idle-mode whenever
possible: the module remains in active-mode. Power saving configuration is by default disabled. It can also be
disabled using the AT+UPSV command (see u-blox AT Commands Manual [3] for detail usage).
The module processor core is activated during idle-mode, and the 26 MHz reference clock frequency is used. It
would draw more current during the paging period than that in the power saving mode.
Figure 10 illustrates a typical example of the module current consumption profile when power saving is disabled.
In such case, the module is registered with the network and while active-mode is maintained, the receiver is
periodically activated to monitor the paging channel for paging block reception. Detailed current consumption
values can be found in TOBY-L2 Data Sheet [1] and in MPCI-L2 Data Sheet [2].
Figure 10: VCC or 3.3Vaux current consumption profile with power saving disabled and module registered with the network:
active-mode is always held and the receiver is periodically activated to monitor the paging channel for paging block reception
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Baseband
Processor
70
VCC
71
VCC
72
VCC
3
V_BCKP
Linear
LDO
Power
Management
TOBY-L2 series
32 kHz
RTC
1.5.2 RTC supply input/output (V_BCKP)
The RTC supply V_BCKP pin is not available on MPCI-L2 series modules.
The V_BCKP pin of TOBY-L2 series modules connects the supply for the Real Time Clock (RTC). A linear LDO
regulator integrated in the Power Management Unit internally generates this supply, as shown in Figure 11, with
low current capability (see the TOBY-L2 series Data Sheet [1]). The output of this regulator is always enabled when
the main module voltage supply applied to the VCC pins is within the valid operating range.
Figure 11: TOBY-L2 series RTC supply (V_BCKP) simplified block diagram
The RTC provides the module time reference (date and time) that is used to set the wake-up interval during the
low power idle-mode periods, and is able to make available the programmable alarm functions.
The RTC functions are available also in power-down mode when the V_BCKP voltage is within its valid range
(specified in the “Input characteristics of Supply/Power pins” table in TOBY-L2 series Data Sheet [1]). The RTC can
be supplied from an external back-up battery through the V_BCKP, when the main module voltage supply is not
applied to the VCC pins. This lets the time reference (date and time) run until the V_BCKP voltage is within its
valid range, even when the main supply is not provided to the module.
Consider that the module cannot switch on if a valid voltage is not present on VCC even when the RTC is supplied
through V_BCKP (meaning that VCC is mandatory to switch on the module).
The RTC has very low current consumption, but is highly temperature dependent. For example, V_BCKP current
consumption at the maximum operating temperature can be higher than the typical value at 25 °C specified in
the “Input characteristics of Supply/Power pins” table in the TOBY-L2 series Data Sheet [1].
If V_BCKP is left unconnected and the module main supply is not applied to the VCC pins, the RTC is supplied
from the bypass capacitor mounted inside the module. However, this capacitor is not able to provide a long
buffering time: within few milliseconds the voltage on V_BCKP will go below the valid range (1.4 V min). This has
no impact on cellular connectivity, as all the module functionalities do not rely on date and time setting.
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