Speech Recognition Module User Manual Make sure to read the safety precautions before installing and using the product and always use the product correctly. This information is intended to keep the user and installer safe and prevent property damage. After reading the user manual, keep it in a place where users can access it at any time. PWSAF2 (Speech Recognition Module) Ver.1.1 2 TABLE OF CONTENTS 1. Introduction ......................................................................................................... 3 1.1 Overview..........................................................................................................................................................3 1.2 Main Functions and Dimensions .....................................................................................................................3 2. Hardware Composition ...................................................................................... 4 2.1 Block Diagram .................................................................................................................................................4 2.2 Command Information ......................................................................................................................................4 3. Electrical Data ..................................................................................................... 5 3.1 Absolute maximum ratings ..............................................................................................................................5 3.2 Electro Static Discharge (ESD) .......................................................................................................................5 3.3 Recommended Operation Conditions .............................................................................................................5 3.4 Power consumption .........................................................................................................................................5 3.5 RF performance...............................................................................................................................................6 4. Interface............................................................................................................... 7 5. Applied Information ............................................................................................ 8 5.1 Power Supply Device ......................................................................................................................................8 5.2 FLASH .............................................................................................................................................................8 5.3 RTOS boot .......................................................................................................................................................8 5.4 UART Serial Interface ......................................................................................................................................8 5.4.1 UART 1 ..................................................................................................................................................8 5.4.2 UART 2 ..................................................................................................................................................8 5.5 RF Interface .....................................................................................................................................................8 5.6 Environmental Guidelines................................................................................................................................8 6. Package Specifications...................................................................................... 9 6.1 Mechanical overview of speech recognition module circuit board...................................................................9 6.2 Label attached to the speech recognition module ...........................................................................................9 7. Compliance with Standards ............................................................................ 10 7.1 IEEE / IETF....................................................................................................................................................10 7.2 Wi-Fi ..............................................................................................................................................................10 8. Product specifications ..................................................................................... 11 3 1. Introduction 1.1 Overview This module is an integrated microprocessor that supports Wi-Fi wireless communication and air conditioner voice recognition, and is designed to be able to operate as an independent communication module. It supports various interfaces, allowing it to connect with a variety of external devices. In addition, its cost-effective performance based on RTOS makes it suitable for IoT devices. It provides scalability for connecting with a variety of devices and provides data transfer speeds up to 72 Mbit/s for Wi-Fi. It can be operated as a single Wi-Fi module or connected to the host through a serial interface. 1.2 Main Functions and Dimensions 1. ARM Cortex-R4 32bit RISC-based MCU 2. IEEE 802.11b/g/n 1X1 2.4Ghz (up to 72.2Mbps) 3. Supports TX/RX LDPC 4. Supports hardware-based AES/TKIP encryption 5. Supports RTOS-based integrated SW development environment 6. Supports TCP/IP Stack 7. Air conditioner control through server-based natural language speech recognition 8. Input Power: dual DC 12V/5V 9. Mic. spec : 2Ch. Analog MEMS Mic. 10. Spk output: 1.9W/4 Product picture 4 2. Hardware Composition 2.1 Block Diagram 1p 4p 5V Figure 2-1 Block Diagram 2.2 Command Information Air conditioner uses the Main PCBA and LGAP, for other internal communication, see block diagram in Fig. 2-1. 5 3. Electrical Data 3.1 Absolute maximum ratings Table 3-1 Absolute maximum ratings. Exceeding one of the absolute maximum ratings can lead to performance degradation or damage. Values are conditions that apply one at a time. Rating Supply voltage Input RF level Storage temperature Min. 4.5
-20 Max. 17 17
+70 Unit V dBm C 3.2 Electro Static Discharge (ESD) Wi-Fi modules can withstand ESD voltages up to 1000 V HBM (Human Body Model). According to JESD22-A114 and JESD22-A115, it can withstand up to 450 V CDM (Charge Device Model). 3.3 Recommended Operation Conditions Table 3-2 Recommended operation conditions Rating
*Supply Voltage VCC
*Supply Voltage VCC Operating temperature Wi-Fi module voltage at the same time. Min. 4.5 2.7
-20 Typ. 12 5
+25 Max. 17 6.6
+70 Unit V V C You can select between 12V/5V input by changing the wiring of the Wafer Connector. Do not apply 3.4 Power consumption 3.4.1 Current consumption Table 3-3 Current consumption of the WiFi module when the system clock is 320MHz in Normal mode Mode Conditions Parameter Voltage Min. Typ. Max. Unit All modes TX [802.11b], 11 Mbps TX [802.11g], 54 Mbps TX [802.11n], MCS7 RX [802.11b], 11 Mbps RX [802.11g], 54 Mbps RX [802.11n], MCS7 Peak 25C 25C 25C 25C 25C 25C VCC VCC VCC VCC VCC VCC VCC 3.3 V 3.3 V 3.3 V 3.3 V 3.3 V 3.3 V 3.3 V 480 480 420 410 150 150 150 mA mA mA mA mA mA mA 380 320 310 100 100 100 6 3.4.2 Power consumption This data measures the power consumption in a scenario where the voice recognition module is in operation mode and the voice recognition function is being used. Conditions: Tamb = 25C, VCC = 12V Table 3.4 Power consumption in Normal mode. *Output power value WLAN module's antenna port Typ. Output value. Max Output Power*
Typ. Power Consumption Comments
+17 dBm 1100 mW 11 Mbps, 320 MHz, when voice is speaking 3.5 RF performance Conditions: WLAN module's antenna port radiation test VCC = 12V, Tamb = -20 to + 70C, Shield Can applied Table 3-5 RF performance Frequency(MHz) Efficiency (%) Avg. Gain(dBi) Peak Gain(dBi) 2400 2442 2485 70.02 74.40 62.27
-1.55
-1.28
-2.06 1.80 2.18 1.63 4. Interface 2Ch. MIC input Spk Power/UART 7 Figure 4-1 Voice recognition module pin Connector type Description CN_MAIN 6 pin 2.00 mm pin header CN_MIC1 CN_MIC2 CN_SPK TP102 / TP103 TP312 - TP317 3 pin 2.00 mm pin header 3 pin 2.00 mm pin header Test Point Test Point TP305 / TP306 Test Point Power Supply and UART
(Application dependent) Left MIC input Right MIC input UART (to Main PCBA) JTAG for development
(development only) UART for debugging
(function test only) 2 pin 2.00 mm pin header Mono Speaker output (1.9W / 4) 8 5. Applied Information 5.1 Power Supply Device The voice recognition module must be powered by a DC 5 V or 12 V constant voltage supply unit. 5.2 FLASH Out of the speech recognition module's 16 MB, 16 MB is available for a user application. 5.3 RTOS boot RTOS booting finishes about 10 seconds before the console interface can be used. 5.4 UART Serial Interface It has two UART interfaces for communicating with the speech recognition module. 5.4.1 UART 1 This interface is a user application. 5.4.2 UART 2 The UART2 interface is used for configuration and debugging. The pins are configured as follows. Pin 1 is located on the PCB's outer edge. Pin 1: DC 12 V Pin 2: GND Pin 3: Reset Pin 4: DC 5 V Pin 5 : RX_D (B18 on AP) Pin 6 : TX_D (B15 on AP) The UART port's maximum baud rate is 115200. 5.5 RF Interface The voice recognition module has high-performance chip antennas like the basic RF interface. 5.6 Environmental Guidelines Speech recognition modules are designed and produced in compliance with ROHS regulations and environmental guidelines. 6. Package Specifications 6.1 Mechanical overview of speech recognition module circuit board 9 m m 0 1 m m 0 4 60 mm 6.2 Label attached to the speech recognition module P/no, S/W version information and MAC address are displayed. 1. PCB Assy P/no 2. MAC Address 3. S/W P/no 4. S/W Version 5. CRC Check Sum 6. Byte Check Sum 7. KC certification number 8. Rated output 10 7. Compliance with Standards 7.1 IEEE / IETF Table 7.1 Relevant IEEE Standards Standard Revision 802.11 802.11b 802.11d 802.11e 802.11g 802.11i 802.11k 802.11n 802.11r 802.11h RFC1023 802.11 R2003 802.11 R2003 802.11 R2003 D9,0 Aug. 2004
-2003
-2004 Spec released Oct 29tn 2009 Draft 9.0, 2008 1997 edition Inherent 7.2 Wi-Fi Table 7.2 Relevant Wi-Fi Standards Description WLAN MAC& PHY High rate DSSS (5,5/11 Mbit/s) Operation in different regulatory domains QoS enhancements Extended rate PHY (ERP-PBCC, DSS-OFDM) Security enhancements Longer Range, Faster Throughput Fast BSS transition Bridge tunneling Frame encapsulation Draft 11.0, 2008 Wireless network management Specification Description Revision Wi-Fi 802.11b with WPA system inter Operability test plan for IEEE 802.11b devices 802.11b devices with WPA Wi-Fi 802.11g with WPA system inter Operability test plan 802.11g devices with WPA 2.1 2.0 Company name: LG Electronics Inc. Device name: Specified low-output wireless device (PWFSA2) Manufacture year/month: 2017. 12. Manufacturer/Country of Origin: LG Electronics Inc./Republic of Korea Authentication identifier: R-CRM-LGE-PWFSA2 The relevant wireless device may experience radio interference, which could make safety related services unavailable. This device is registered for electromagnetic compatibility at home (Class B), it is mainly intended for use at home, and can be used in any region. The user should keep a distance of 20 cm or more from the wireless device. 11 8. Product specifications Model PWFSA2 Equipment Specific low-power wireless data communication system
(Wireless devices for wireless data communication system) Operating Temperature
-20 C ~ 70 C Power usage DC 12.0 V / 5.0 V Frequency Transmit 2412 MHz ~ 2462 MHz (11b, 11g, 11n_HT20) To 2412 MHz ~ 2462 MHz (11b, 11g, 11n_HT20) Output 10 mW Name of company receiving conformity assessment LG Electronics, Inc. Manufacturer LG Electronics, Inc. Country of Manufacture Korea Authentication number R-CRM-LGE-PWFSA2 12
[USA ]
FCC Notice This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and the receiver.
- Connect the equipment to an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help. This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions:
(1) this device may not cause harmful interference and
(2) this device must accept any interference received, including interference that may cause undesired operation of the device. Any changes or modifications in construction of this device which are not expressly approved by the party responsible for compliance could void the users authority to operate the equipment. FCC RF Radiation Exposure Statement This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter. This equipment should be installed and operated with a minimum distance of 20 cm (7.8 inches) between the antenna and your body. Users must follow the specific operating instructions for satisfying RF exposure compliance. 13
[CANADA]
Industry Canada Statement This device contains licence-exempt transmitter(s)/receiver(s) that comply with Innovation, Science and Economic Development Canadas licence-exempt RSS(s). Operation is subject to the following two conditions:
(1) This device may not cause interference.
(2) This device must accept any interference, including interference that may cause undesired operation of the device. Le prsent appareil est conforme aux CNR dIndustrie Canada applicables aux appareils radio exempts de licence. Lexploitation est autorise aux deux conditions suivantes :
(1) lappareil ne doit pas produire de brouillage, et
(2) lutilisateur de lappareil doit accepter tout brouillage radiolectrique subi, mme si le brouillage est susceptible den compromettre le fonctionnement. IC Radiation Exposure Statement This equipment complies with IC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with a minimum distance of 20 cm (7.8 inches) between the antenna and your body. Lantenne (ou les antennes) doit tre installe de faon maintenir tout instant une distance minimum de au moins 20 cm entre la source de radiation (lantenne) et toute personne physique. NOTE: THE MANUFACTURER IS NOT RESPONSIBLE FOR ANY RADIO OR TV INTERFERENCE CAUSED BY UNAUTHORIZED MODIFICATIONS TO THIS EQUIPMENT. SUCH MODIFICATIONS COULD VOID THE USERS AUTHORITY TO OPERATE THE EQUIPMENT. NOTA: EL FABRICANTE NO ES RESPONSABLE DE NINGUNA INTERFERENCIA DE RADIO O TV CAUSADA POR MODIFICACIONES NO AUTORIZADAS A ESTE EQUIPO. DICHAS MODIFICACIONES PODRAN ANULAR LA AUTORIDAD DEL USUARIO PARA OPERAR EL EQUIPO.
[Wireless Spec. Information for USA & CANADA]
Wireless LAN module Specifications Model PWFSA2 Frequency Range 2412 MHz - 2462 MHz Output Power (Max) IEEE 802.11b: 23.42 dBm IEEE 802.11g: 21.11 dBm IEEE 802.11n: 20.28 dBm 14 Regulatory notice to host manufacturer according to KDB 996369 D03 OEM Manual v01>
This module has been granted modular approval as below listed FCC rule parts. List of applicable FCC rules FCC Rule parts 15C(15.247) Summarize the specific operational use conditions The OEM integrator should use equivalent antennas which is the same type and equal or less gain then an antenna listed in 2.7 in this instruction manual. RF exposure considerations The module has been certified for integration into products only by OEM integrators under the following condition:
The antenna(s) must be installed such that a minimum separation distance of at least 20 cm is maintained between the radiator (antenna) and all persons at all times. The transmitter module must not be co-located or operating in conjunction with any other antenna or transmitter except in accordance with FCC multi-transmitter product procedures. Mobile use As long as the three conditions above are met, further transmitter testing will not be required. OEM integrators should provide the minimum separation distance to end users in their end-product manuals. Antennas list This module is certified with the following integrated antenna. Type: Dielectric Chip antenna (Peak gain (dBi): 2.87 dBi) Any new antenna type, higher gain than listed antenna should be met the requirements of FCC rule 15.203 and 2.1043 as permissive change procedure. Label and compliance information End Product Labeling The module is labeled with its own FCC ID and IC Certification Number. If the FCC ID and IC Certification Number are not visible when the module is installed inside another device, then the outside of the device into which the module is installed must also display a label referring to the enclosed module. In that case, the final end product must be labeled in a visible area with the following:
Contains FCC ID: BEJ-PWFSA2 Contains IC: 2703N-PWFSA2 Information on test modes and additional testing requirements OEM integrator is still responsible for testing their end-product for any additional compliance requirements required with this module installed (for example, digital device emissions, PC peripheral requirements, additional transmitter in the host, etc.). Additional testing, Part 15 Subpart B disclaimer The final host product also requires Part 15 subpart B compliance testing with the modular transmitter installed to be properly authorized for operation as a Part 15 digital device. tiquetage du produit final (IC) Le module PWFSA2 est tiquet avec sa propre identification FCC et son propre numro de certification IC. Si lidentification FCC et le numro de certification IC ne sont pas visibles lorsque le module est install lintrieur dun autre dispositif, la partie externe du dispositif dans lequel le module est install devra galement prsenter une tiquette faisant rfrence au module inclus. Dans ce cas, le produit final devra tre tiquet sur une zone visible avec les informations suivantes :
Contient module metteur identification FCC ID: BEJ- PWFSA2 Contient module metteur IC : 2703N-PWFSA2 15
[CE]
Simplified EU Declaration of Conformity Hereby, LG Electronics Inc. declares that the radio equipment type Voice Recognition Module is in compliance with Directive 2014/53/EU. The full text of the EU declaration of conformity is available at the following internet address: http://www.lg.com/global/support/cedoc/cedoc#
RF Exposure The antenna (or antennas) must be installed so as to maintain at all times a distance minimum of at least 20 cm between the radiation source (antenna) and any individual. This device may not be installed or used in conjunction with any other antenna or transmitter Manufacturer name: LG Electronics Inc. The postal address: LG Electronics European Shared Service Center B.V. Krijgsman 1, 1186 DM Amstelveen, The Netherlands The host manufacturer has the responsibility that the host device should be compliance with all essential requirement of RED.