Telit Wireless Solutions BlueMod+S42 Installation manual

BlueMod+S42
Hardware User Guide
1VV0301303 Rev.10 –2021-03-17
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BlueMod+S42 Hardware User Guide
1VV0301303 Rev.10 –2021-03-17
Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.
Page 2 of 88
APPLICABILITY TABLE
PRODUCTS
BLUEMOD+S42/AI/CEN
BLUEMOD+S42/AI/ATEX
BLUEMOD+S42/AI/ADC/LUA
BLUEMOD+S42/AI/ADC/TWI
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SPECIFICATIONS 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
entirely 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.
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Usage and Disclosure Restrictions
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.
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
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.
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.
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.
Copyright © Telit Communications S.p.A. 2018.
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BlueMod+S42 Hardware User Guide
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Contents
1Introduction...............................................................................................................12
1.1 Scope ...................................................................................................................12
1.2 Audience...............................................................................................................12
1.3 Contact Information, Support ................................................................................12
1.4 Document Organization ........................................................................................13
1.5Text Conventions..................................................................................................13
1.6 Related Documents ..............................................................................................14
2General Product Description....................................................................................15
2.1 Feature Summary .................................................................................................15
2.2 Applications ..........................................................................................................16
2.3 General Cable Replacement.................................................................................16
2.3.1 Industry ..........................................................................................................................16
2.3.2 POS/Advertising.............................................................................................................16
2.3.3 Healthcare and Medical.................................................................................................16
2.3.4 Sports and Fitness.........................................................................................................16
2.3.5 Entertainment.................................................................................................................17
2.4 Block Diagram.......................................................................................................17
3Application Interface.................................................................................................18
3.1 Power Supply........................................................................................................18
3.1.1 Power-up Slew-Rate......................................................................................................19
3.2 Reset ....................................................................................................................19
3.3 Serial Interface......................................................................................................21
3.3.1 Serial Interface HW Configuration for Power Management..........................................22
3.3.2 4-Wire Serial Interface...................................................................................................26
3.3.3 UART Example Circuits.................................................................................................27
3.3.4 Baud Rate Deviation......................................................................................................28
3.3.5 Dynamic I/O Signal Type Changes Depending on UICP Status ..................................29
3.3.6 Additional I/O Signals for Serial Interface Functionality................................................29
3.4 GPIO Interface......................................................................................................30
3.5 I2C Interface..........................................................................................................30
3.6 SPI Serial Peripheral Interface..............................................................................31
3.7 Bluetooth Radio Interface......................................................................................31
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3.8 NFC Function........................................................................................................31
3.8.1 NFCT Antenna Recommendations ...............................................................................32
3.8.2 Power Back Feeding......................................................................................................32
3.9 Slow Clock Interface .............................................................................................33
3.9.1 32,768 kHz Crystal Oscillator Specification (32k XOSC)..............................................33
3.9.2 Connection of an External 32,768 kHz Crystal .............................................................34
3.10 Test Mode..........................................................................................................35
3.11 Operating in a Power-Switched Environment.....................................................36
3.12 Serial Wire Debug Interface...............................................................................36
3.13 DC/DC Converter...............................................................................................37
3.14 Analog/Digital Converter (ADC).........................................................................37
4Module Pins...............................................................................................................40
4.1 Pin Numbering......................................................................................................40
4.2 General Pin Description........................................................................................41
4.3 Application Specific CEN Pin Configuration ..........................................................42
4.4 Application Specific ADC/TWI Pin Configuration...................................................43
4.5 Application Specific ADC/LUA Pin Configuration...................................................45
4.6 Handling of Unused Signals..................................................................................47
5Electrical Characteristics..........................................................................................48
5.1 Absolute Maximum Ratings...................................................................................48
5.2 Operating Conditions ............................................................................................48
5.3 Environmental Requirements................................................................................48
5.4 DC Parameter.......................................................................................................49
5.4.1 General Purpose I/O (GPIO) .........................................................................................49
5.4.2 EXT-RES#......................................................................................................................49
5.4.3 Analog Digital Converter (ADC).....................................................................................50
5.5 Power Consumption and Power-Down Modes......................................................51
5.5.1 Power Consumption BlueMod+S42/AI CEN FW ..........................................................51
5.6 RF Performance....................................................................................................55
5.6.1 BLE Receiver.................................................................................................................55
5.6.2 BLE Transmitter.............................................................................................................56
5.6.3 Antenna-Gain and Radiation Pattern ............................................................................57
5.7 Power-Up Time.....................................................................................................59
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6Mechanical Characteristics ......................................................................................60
6.1 Dimensions...........................................................................................................60
6.2 Recommended Land Pattern ................................................................................60
6.3 Re-flow Temperature-Time Profile ........................................................................61
6.4 Placement Recommendation................................................................................62
6.5 Housing Guidelines...............................................................................................62
6.6 Antenna Issues.....................................................................................................62
6.7 Safety Guidelines..................................................................................................63
6.8 Cleaning................................................................................................................63
7Application Diagram .................................................................................................64
8Compliances..............................................................................................................65
8.1 Declaration of Conformity CE................................................................................65
8.2 FCC Compliance...................................................................................................66
8.2.1 FCC Grant......................................................................................................................66
8.2.2 FCC Statement..............................................................................................................67
8.2.3 FCC Caution ..................................................................................................................67
8.2.4 FCC Warning .................................................................................................................67
8.2.5 FCC RF-exposure Statement........................................................................................67
8.2.6 FCC Labeling Requirements for the End Product.........................................................68
8.3 IC Compliance ......................................................................................................68
8.3.1 IC Grant..........................................................................................................................69
8.3.2 IC Statement..................................................................................................................71
8.3.3 IC Caution......................................................................................................................71
8.3.4 IC RF-exposure Statement............................................................................................71
8.3.5 IC Labeling Requirements for the End Product.............................................................72
8.3.6 IC Label Information BlueMod+S42 ..............................................................................72
8.4 KC Certification.....................................................................................................73
8.4.1 KC Certificate.................................................................................................................73
8.4.2 KC Mark.........................................................................................................................74
8.5 MIC Certification ...................................................................................................75
8.5.1 MIC Certificate ...............................................................................................................76
8.6 Anatel Certification................................................................................................77
8.7 Australian RCM Mark............................................................................................78
8.8 Bluetooth Qualification..........................................................................................79
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8.9 RoHS Declaration .................................................................................................80
9Packing ......................................................................................................................81
9.1 Tape&Reel Packing ..............................................................................................81
9.1.1 Tape...............................................................................................................................82
9.1.2 Reel................................................................................................................................82
9.2 Tray Packing.........................................................................................................83
9.2.1 Module Orientation.........................................................................................................83
9.2.2 Tray Dimensions............................................................................................................83
9.3 Moisture Sensitivity Level......................................................................................84
10 Evaluation Kit.........................................................................................................85
11 Safety Recommendations .....................................................................................86
12 Document History ..................................................................................................87
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BlueMod+S42 Hardware User Guide
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Figures
Figure 1: BlueMod+S42/AI Block Diagram..........................................................................................17
Figure 2: BlueMod+S42 Example Power Supply with LDO................................................................18
Figure 3: BlueMod+S42 Example Reset.............................................................................................19
Figure 4: Connection BlueMod+Sx to Host.........................................................................................21
Figure 5: Host wake-up from deep-sleep via RESET.........................................................................22
Figure 6: UART Interface with UICP Signals 7-wire (incl. GND)........................................................24
Figure 7: 5-Wire (incl. GND) Interface supporting UICP (min. signals needed).................................24
Figure 8: UART Interface without UICP Signals (5-wire incl. GND)...................................................25
Figure 9: UART Interface without UICP Signals 4-wire (incl. GND)...................................................26
Figure 10: BlueMod+S42 Serial Interface (RS-232 COM Port) Supporting UICP .............................27
Figure 11: BlueMod+S42 Example Serial Interface (Mixed Signal Level)..........................................27
Figure 12: BlueMod+S42 I2C Interface................................................................................................30
Figure 13: BlueMod+S42 SPI Interface (Example: Master Mode)......................................................31
Figure 14: BlueMod+S42 NFC Antenna Tuning .................................................................................32
Figure 15: BlueMod+S42 connection of external XTAL......................................................................34
Figure 16: ADC Signal Input Structure................................................................................................38
Figure 17: BlueMod+S42 Pin Numbering (Top View).........................................................................40
Figure 18: Typical Antenna Radiation Pattern at 2402MHz................................................................57
Figure 19: Typical Antenna Radiation Pattern at 2441MHz................................................................58
Figure 20: Typical Antenna Radiation Pattern at 2480MHz................................................................58
Figure 21: BlueMod+S42/AI Dimensions............................................................................................60
Figure 22: BlueMod+S42 Land Pattern TOP VIEW............................................................................60
Figure 23: Soldering Temperature-Time Profile (for reflow soldering)...............................................61
Figure 24: BlueMod+S42/AI Placement Recommendation ................................................................62
Figure 25: Typical Application Schematics .........................................................................................64
Figure 26: Module Orientation in Carrier Tape....................................................................................81
Figure 27: Carrier Tape Dimensions...................................................................................................82
Figure 28: Reel Dimensions ................................................................................................................82
Figure 29: Module Orientation on Tray................................................................................................83
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Figure 30: Tray Dimensions ................................................................................................................83
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BlueMod+S42 Hardware User Guide
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Tables
Table 1: Power up Rise Time Requirements ......................................................................................19
Table 2: Pin States during Reset.........................................................................................................20
Table 3: Wake-Up Sources AT+SYSTEMOFF...................................................................................23
Table 4: Deviation of Baud rates.........................................................................................................28
Table 5: 32,768kHz Crystal Oscillator.................................................................................................33
Table 6: Testmode# / Boot0 Logic.......................................................................................................35
Table 7: ADC Functionality versus Firmware......................................................................................37
Table 8: TACQ versus R(VSOURCE) max..................................................................................................39
Table 9: General Pin Assignment........................................................................................................41
Table 10: Application Specific Pin Assignments, CEN .......................................................................42
Table 11: Application specific pin assignments, ADC/TWI.................................................................44
Table 12: Application specific pin assignments, ADC/LUA.................................................................46
Table 13: Absolute Maximum Ratings.................................................................................................48
Table 14: DC Operating Conditions ....................................................................................................48
Table 15: Environmental Requirements..............................................................................................48
Table 16: DC Characteristics, Digital IO..............................................................................................49
Table 17: DC Characteristics, EXT-RES#...........................................................................................49
Table 18: Supply Current Sleep Modes, no Radio Activity.................................................................51
Table 19: Supply Current BLE Terminal I/O Profile, Peripheral Device Role.....................................52
Table 20: Supply Current Sleep Modes, no Radio Activity, ATEX .....................................................53
Table 21: Supply Current BLE Terminal I/O Profile, Peripheral Device Role, ATEX.........................54
Table 22: RF Performance BLE Receiver...........................................................................................55
Table 23: RF Performance BLE Transmitter.......................................................................................57
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BlueMod+S42 Hardware User Guide
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1 Introduction
1.1 Scope
This document providesinformation how theBlueMod+S42/AIcan be integrated into customer
systems. It addresses hardware specifications of the BlueMod+S42/AI and requirements of the
hardware environments for the BlueMod+S42/AI.
NOTE:
The description text “BlueMod+S42” refers to all modules listed in the applicability table.
1.2 Audience
This document is intended for Telit customers, especially system integrators, about to
implement Bluetooth modules in their application.
1.3 Contact Information, Support
For general contact, technical support, to report documentation errors and to order manuals,
contact Telit Technical Support Center (TTSC) at:
[e-mail]
[e-mail]
[e-mail]
or
[e-mail] for global Bluetooth support
Alternatively, use:
https://www.telit.com/contact-us
For detailed information about where you can buy the Telit modules or for recommendations
on accessories and components visit:
https://www.telit.com
To register for product news and announcements or for product questions contact Telit
Technical Support Center (TTSC).
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.
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1.4 Document Organization
This document contains the following chapters:
“Chapter 1: “Introduction” provides a scope for this document, target audience, contact and
support information, and text conventions.
“Chapter 2: General Product Description” gives an overview of the features of the product.
“Chapter 3: Application Interface” describes in details the interfaces of the product.
“Chapter 4: Module Pins” describes the signal mapping and specification.
“Chapter 5: Electrical Characteristics” describes in details the characteristics of the product.
“Chapter 6: Mechanical Characteristics” describes the mechanical characteristics.
“Chapter 7: Application Diagramm” describes a typical application of BlueMod+S42.
“Chapter 8: “Compliances” provides some fundamental information on conformity and
compliances.
“Chapter 9: Packing” describes the Tape&Reel and the tray packing of BlueMod+S42.
“Chapter 10: Evaluation Kit” contains a reference on the availability of BlueEva+S42
evaluation kit.
“Chapter 11: “Safety Recommendation” provides some safety recommendations that must be
follow by the customer in the design of the application that makes use of the BlueMod+S42.
1.5 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.
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1.6 Related Documents
•[1] Nordic: nRF52_Series_Reference_Manual
•[2] Nordic: nRF52832_PS v1.x.pdf (Product Specification)
•[3] BlueMod+S42/Central AT Command Reference, 80512ST10771A
•[4] BlueMod+S42 Software User Guide, 1VV0301318
•[5] UICP_UART_Interface_Control_Protocol, 30507ST10756A
•[6] BlueMod+S42 Testmode Reference, 80512NT11496A
•[7] Bluetooth SIG Core Specification V4.2
•[8] BlueMod+S42/Central AT Command Reference 80512ST10771A
•[9] BlueMod+S42/ADC/TWI AT Command Reference 80512ST10874A
•[10] BlueMod+S42/ADC/LUA AT Command Reference 80512ST10860A
•[11] BlueMod+S42 Lua API Documentation 30512ST10861A
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2 General Product Description
2.1 Feature Summary
▪Bluetooth specification V4.2 compliant
▪Supports Bluetooth low energy
▪Fully qualified Bluetooth V4.2 Single Mode LE
▪CE certified
▪FCC and IC certified
▪Nordic nRF52832 inside
▪Fast Connection Setup
▪RF output power -20 up to +4dBm EIRP
▪RF output power -40dBm EIRP in Whisper Mode
▪RSSI detector on board
▪High sensitivity design
▪Supply voltage range 1,7V to 3,6V
▪Internal crystal oscillator (32 MHz)
▪LGA Surface Mount type. BlueMod+S42: 17 x 10 x 2.6 mm3
▪Pin compatible to Telit BlueMod+S BLE and BlueMod+SR dual mode module
▪Shielded to be compliant to FCC full modular approval
▪Flexible Power Management
▪128-bit AES encryption
▪NFC peripheral communication signal interface type A with 106 kbps bit rate
▪High-speed UART interface
▪I2C Master
▪SPI Master/Slave interface
▪Low power comparator
▪Real Time Counter
▪Up to 19 digital IO’s for individual usage by embedded software
▪Up to 8 analog inputs for individual usage by embedded software
▪8/9/10/12bit ADC
▪Arm® CortexTM-M4F core for embedded profiles or application software
▪Manufactured in conformance with RoHS2
▪Operating temperature -40 ... +85 °C
▪Weight: 0,7 g
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2.2 Applications
The BlueMod+S42 is designed to be used in low power applications, like sensor devices.
Some typical applications are described in this chapter.
Supported profiles are:
•Terminal I/O
•GATT based LE-profiles
NOTE:
Support for any additional profile is possible on request.
2.3 General Cable Replacement
In case there is no standardized application specific profile available the BlueMod+S42 offers
Telit’s Terminal I/O profile, which allows transparent data transfer over UART and supports
Secure Simple Pairing, making the pairing process easy and the connection secure. Terminal
I/O is available for iOS and Android as well as implemented in Telit’s dual mode module
BlueMod+SR.
2.3.1 Industry
BlueMod+S42 can be used to monitor and control motors, actuators, values and entire
processes.
2.3.2 POS/Advertising
BlueMod+S42 supports iBeacon or similar applications.
2.3.3 Healthcare and Medical
Usage of Bluetooth is aimed mainly at devices that are used for monitoring vital data. Typical
devices are blood glucose meter, blood pressure cuffs and pulse ox meters. Bluetooth
BR/EDR and low energy were chosen by the Continua Health Alliance as transports for
interoperable end to end communication.
2.3.4 Sports and Fitness
In the sports and fitness segment the BlueMod+S42 is used in devices for positioning as well
as monitoring vital data. Typical devices in this market are heart rate monitors, body
temperature thermometers, pedometers, cadence meters, altimeter, positioning / GPS tracking
and watches displaying information from sensors.
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2.3.5 Entertainment
Bluetooth technology is already used in a wide variety of devices in the entertainment sector,
namely set-top boxes / gaming consoles. BlueMod+S42 is especially suited for use in remote
controls, gaming controller and wireless mouse/keyboard applications.
2.4 Block Diagram
nRF52832
VSUP
BlueMod+S42/AI
RESET
I2C
UART
SPI
1
2
up to 7
3
GND
3.0V
32MHz
opt. 32kHz
Serial Wire Debug
onboard
antenna
2
GPIO
up to 19
Analog In
up to 6
NFC-Antenna
2
32,768kHz
optional
Figure 1: BlueMod+S42/AI Block Diagram
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BlueMod+S42 Hardware User Guide
1VV0301303 Rev.10 –2021-03-17
Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.
Page 18 of 88
3 Application Interface
3.1 Power Supply
BlueMod+S42 require a power supply with the following characteristics:
Typical: 3,0VDC, min.: 1,7VDC, max.: 3,6VDC, thereby delivering > 25 mA peak
BlueMod+S42 is designed to be powered from 3V coin cell batteries e.g. CR2032 directly, or
any other power source complying with the given requirements. For optimal performance, a
stable supply is recommended. Furthermore, it is recommended to place a capacitor in parallel
to the CR2032 3V coin cell battery in order to prolong battery lifetime, by compensating the
effects of the rising source resistance of the battery to pulsed loads. Since the isolation
resistance of this capacitor will discharge the battery in a not insignificant scale, the capacitor
should be chosen under consideration of the following rules:
•capacitance as small as necessary
•nominal voltage as high as possible
•case size as large as possible
•use X7R instead of X5R
In case of using an NFC antenna in conjunction with batteries attend to chapter 3.8.2 Power
Back Feeding.
BlueMod+S42
XC6209F-3.3
E-6,F-6
VSUP
GND:
A-7,E-7,F-7,B-[5:8],
C-[5:8],D-8,E-8,F-8
1µ + 100n
1µ
VOUT
VSS
VIN
CE
5 1
3
2
+5VDC
Figure 2: BlueMod+S42 Example Power Supply with LDO
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BlueMod+S42 Hardware User Guide
1VV0301303 Rev.10 –2021-03-17
Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.
Page 19 of 88
3.1.1 Power-up Slew-Rate
Parameter
Min
Max
Unit
VSUP rise time rate (1)
0
60
ms
(1) 0V to 1,7V
Table 1: Power up Rise Time Requirements
3.2 Reset
BlueMod+S42 are equipped with circuitry for generating reset from three sources:
•A reset is held active, when VSUP falls below the threshold of the brownout detector
(VBOR = 1,2V … 1,7V), and is released when VSUP rises above VBOR + VHYST .
The brownout detector also holds the reset active during power up, until VSUP >
VBOR.
•A reset is generated, when VSUP is > VBOR and increases 300 mV or more, within
300 ms or less.
•By holding pin B-1 (EXT-RES#) at ≤ VSUP*0,25V for tHOLDRESETNORMAL ≥0,2µs, an
external reset (pin reset) is generated. EXT-RES# may be left open if not used. This
pin has:
ofor all the variants except BlueMod+S42/AI/ATEX a fixed internal pull-up
resistor (RPU = 11kΩ... 16kΩ) and a series resistor of 470Ω
ofor BlueMod+S42/AI/ATEX a fixed internal pull-up resistor (RPU = 11kΩ...
16kΩ). A series resistor less than 560Ωshould be added externally.
BlueMod+S42
E-6,F-6
VSUP
GND
+3V3
EXT-RES# B-1
Reset-Switch is optional
Please Note: EXT-RES# of BlueMod+S42 has approx. 13k internal pullup.
Reset signal is optional
Host MCU
GPIO
VDD
Figure 3: BlueMod+S42 Example Reset
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BlueMod+S42 Hardware User Guide
1VV0301303 Rev.10 –2021-03-17
Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.
Page 20 of 88
The following table shows the pin states of BlueMod+S42 during reset active.
Pin Name
State: BlueMod+S42
EXT-RES#
Input with pull-up(1)
XL-IN
Input floating (disconnected)
XL-OUT
Input floating (disconnected)
UART-TXD
Input floating (disconnected)
UART-RXD
Input floating (disconnected)
UART-RTS#
Input floating (disconnected) with pull-up resistor 470kΩ(2)
UART-CTS#
Input floating (disconnected)
IUR-OUT#
Input floating (disconnected)
IUR-IN#
Input floating (disconnected)
GPIO[0:14]
Input floating (disconnected)
TESTMODE#
Input floating (disconnected)
BOOT0
Input floating (disconnected)
SWDIO
Input with pull-up(1)
SWCLK
Input with pull-down (1)
(1) pull-up, pull-down: RPU, RPD is typ. 13kΩ(11kΩto 16kΩ)
(2) a discrete resistor is used
Table 2: Pin States during Reset
The pin states as indicated in Table 2 are kept until hardware initialization has started.
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