Datasheet

ManualsBrandsMicrochip ManualsCommunications & Networking ModulesWLAN Module 802.11b/g, UART/TTL

 2014 Microchip Technology Inc. DS70005171A-page 1

RN171

Features:

• Complete, Embedded 2.4 GHz IEEE 802.11 b/g

Wireless LAN Module

• 14 General Purpose Input/Output (GPIO) Pins

(Four GPIOs shared with UART)

• Eight Analog Sensor Inputs

• Small Surface-Mount Module: 1.050” x 0.700” x

0.125” (26.67 mm x 17.78 mm x 3.18 mm)

• Integrated Crystal, Internal Voltage Regulator,

Matching Circuitry, Power Amplifier

• Integrates Easily into Final Product – Minimizes

Product Development, Provides Quicker Time to

Market

• Configured using Simple ASCII Commands

•Networking:

- Supports Infrastructure and SoftAp

Networking Modes

- Built-in Networking Applications: TCP, UDP,

DHCP, DNS, ICMP, ARP, HTTP Client, and

FTP Client

- Complete On-Board TCP/IP Networking

Stack

- Unique MAC Address

- Upgrade Firmware Over the Air using FTP

- Supports Wi-Fi

Protected Setup (WPS)

Power Management:

• Ultra Low-Power Sleep Mode (4 uA)

• Perfect for Portable Battery Operated Devices

• Battery Boost Control Circuitry

• Real-Time Clock for Time Stamping, Auto-Sleep,

and Auto-Wake

Antenna:

• External Antenna Connection via RF Pad

• Certified Antenna Types: Chip, Whip, PCB Trace,

and Wire

Compliance:

• Modular Certified for the United States (FCC) and

Canada (IC)

• European R&TTE Directive Assessed Radio

Module

• Australia, New Zealand, Korea, Taiwan

FIGURE 1:

Media Access Control (MAC)/Baseband

Features:

• Security: WEP-128, WPA-PSK (TKIP),

WPA2-PSK (AES)

Operational:

• Operating Voltage: 3.3V (typical)

• Temperature Range: -40C to +85C Industrial

• Low-Current Consumption:

- Rx mode: 40 mA

- Tx mode: 120 mA at 0 dBm

- Sleep: 4 µA

RF/Analog Features:

• Frequency: 2.412 to 2.462 GHz

• Modulation:

- 802.11b Compatibility: DSSS (CCK-11,

CCK-5.5, DQPSK-2, DBPSK-1)

- 802.11g: OFDM

- Receive Sensitivity: -83 dBm Typical

- Power Output: 0 to +12 dBm

Over-the-Air Data Rate:

• 1-11 Mbps for 802.11b

• 6-54 Mbps for 802.11g

Applications:

• Remote Equipment Monitoring

• Telemetry

• Industrial Sensors

• Home Automation

2.4 GHz IEEE Std. 802.11 b/g Wireless LAN Module

Summary of content (30 pages)

PAGE 1
RN171 2.4 GHz IEEE Std. 802.11 b/g Wireless LAN Module Features: FIGURE 1: • Complete, Embedded 2.4 GHz IEEE 802.11 b/g Wireless LAN Module • 14 General Purpose Input/Output (GPIO) Pins (Four GPIOs shared with UART) • Eight Analog Sensor Inputs • Small Surface-Mount Module: 1.050” x 0.700” x 0.125” (26.67 mm x 17.78 mm x 3.
PAGE 2
RN171 Table of Contents 1.0 2.0 3.0 4.0 5.0 Device Overview .......................................................................................................................................................................... 3 Circuit Description (Hardware Interface) ...................................................................................................................................... 9 Application Information ............................................................................
PAGE 3
RN171 1.0 DEVICE OVERVIEW The RN171 is a standalone, embedded 802.11 b/g Wireless Local Area Network (WLAN) module. The module incorporates an on-board TCP/IP networking stack, cryptographic accelerator, power management subsystem, real-time clock, versatile sensor interface, 2.4 GHz transceiver, and RF power amplifier (see Figure 1-1). With the RN171, designers can embed WiFi and networking functionality rapidly into virtually any device.
PAGE 4
RN171 1.1 ASCII Command & Data Interface 1.2 The “WiFly Command Reference, Advanced Features and Applications User's Guide” (DS50002230) provides a complete description of the ASCII command and data interface for the RN171 module. Figure 1-1 shows the RN171 pin diagram. Figure 1-3 shows the microcontroller to RN171 interface. Table 1-1 describes the RN171 pins.
PAGE 5
RN171 TABLE 1-1: PIN DESCRIPTION Pin Symbol Type Description 1 GND Power Ground reference 2 ISP_TX DO In-system programming transmit 3 ISP_RX DI In-system programming receive 4 GPIO9/SD_CLK/SCLK DIO 5 GPIO8/SD_D3/SS DIO General purpose I/O 8(2,4)/SDIO D3/SD-SPI slave select 6 GPIO7/SD_D2 DIO General purpose I/O 7(2,4)/SDIO D2 7 GPIO6/SD_D1/INT DIO General purpose I/O 6(2,4)/SDIO D1/SD-SPI slave INT 8 GPIO5/SD_D0/MISO DIO General purpose I/O 5(2,4)/SDIO D0/SD-SPI slave MISO
PAGE 6
RN171 TABLE 1-1: PIN DESCRIPTION 35 SENSOR4 AI Sensor interface 4(5) 36 SENSOR5 AI Sensor interface 5(5) 37 SENSOR6 AI Sensor interface 6(5) 38 SENSOR7 AI Sensor interface 7(5) 39 GND Power Ground reference 40 RESET DI Module Reset. Internal 100 kΩ pull-up resistor. Apply a pulse of at least 160 s 41 FORCE_AWAKE DI Module force awake. Internal 100 kΩ pull-down resistor. Apply pulse for at least 245 s.
PAGE 7
RN171 3DG 'HWDLO 0.190 0.200 0.250 0.300 0.350 0.400 0.450 0.500 0.575 Dimensions are in inches. Tolerances: PCB Outline: +/- 0.005” PCB Thickness: +/- 0.001” 0.040" 1 Note: 0.700 0.080" 1.035 0.550 Bottom View 0.060" 1.050 1.000 0.950 0.900 0.890 0.850 0.800 0.750 0.700 0.650 0.600 0.550 0.500 0.450 0.400 0.350 0.300 0.250 0.200 0.150 0.100 0.050 0.025 0.000 0.
PAGE 8
RN171 FIGURE 1-8: DS70005171A-page 8 SOLDER REFLOW CURVE  2014 Microchip Technology Inc.
PAGE 9
RN171 2.0 CIRCUIT DESCRIPTION (HARDWARE INTERFACE) The following sections describe the module’s hardware interface. 2.1 2.2 Use hardware flow control for baud rates of 115,200 and higher. SPI Master Interface The RN171 module contains a master SPI interface (SPI_CS, SPI_CLK, SPI_MISO, and SPI_MOSI) that is connected to an internal Flash memory. Do not connect these pins on the host PCB. 2.
PAGE 10
RN171 2.8 Power Management The module supports an ultra-low power sleep state, from which it can wake for a range of detected reasons. It transitions from asleep to CPU-active in 1.7 ms, and CPU active to network connection in less than 35 ms (typical). The RN171 also supports a keep-alive doze state that provides an instant transition to a wake state. 2.8.1 FORCE AWAKE The RN171 may be forced awake by asserting the FORCE_AWAKE pin for at least 245 ms.
PAGE 11
RN171 3.0 APPLICATION INFORMATION 3.1 Figure 3-1 and Figure 3-2 shows the RN171 application schematic for direct power and battery boost modes, respectively. Figure 3-3 shows a diagram with the optional ISP header. The following sections provide application information, such as an application schematic and antenna informtion. FIGURE 3-1: Schematic RN171 APPLICATION SCHEMATIC – DIRECT POWER MODE 'LUHFW 3RZHU 0RGH 9ROWDJH 5HJXODWRU RU %DWWHU\ 9 3&% 7UDFH &HUDPLF &KLS :LUH 'LSROH ([WHUQDO $QWHQ
PAGE 12
RN171 FIGURE 3-2: RN171 APPLICATION SCHEMATIC – BATTERY BOOST POWER MODE %DWWHU\ %RRVW 3RZHU 0RGH 9 9 3&% 7UDFH &HUDPLF &KLS :LUH 'LSROH ([WHUQDO $QWHQQD 5(6(7 6: *3,2 8$57 8$57 65(*B 9 B&75/ 9 *1' *1' )/$6+B3:5 6(1625 63,B026, 6(1625 63,B6&. 6(1625 63,B0,62 6(1625 63,B&6 6(1625B3:5 *1' 9'' *3,2 6(1625 8 *3,2 6(1625 51 , 50 *3,2 6(1625 9'' 6(1625 *3,2 *1' *3,2 5(6(7 *3,2 )25&(B$:$.
PAGE 13
RN171 TABLE 3-1: TESTED EXTERNAL ANTENNA TYPES Type WIRE ANTENNA Gain PCB Trace 0 dBi Chip 1.07 dBi Wire 0 dBi Whip 2.2 dBi Note 1: 3.2.1 FIGURE 3-5: An antenna type comprises antennas having similar in-band and out-of-band radiation patterns. PCB TRACE ANTENNA Modular certification of the RN171 module was performed with the PCB trace antenna shown in Figure 3-4. The exact dimensions of the trace antenna must be followed.
PAGE 14
RN171 NOTES: DS70005171A-page 14  2014 Microchip Technology Inc.
PAGE 15
RN171 4.0 REGULATORY APPROVAL This section outlines the regulatory information for the RN171 module for the following countries: • • • • • • • United States Canada Europe Australia New Zealand Korea Other Regulatory Jurisdictions 4.1.
PAGE 16
RN171 4.1.2 RF EXPOSURE All transmitters regulated by FCC must comply with RF exposure requirements. OET Bulletin 65, Evaluating Compliance with FCC Guidelines for Human Exposure to Radio Frequency Electromagnetic Fields, provides assistance in determining whether proposed or existing transmitting facilities, operations or devices comply with limits for human exposure to Radio Frequency (RF) fields adopted by the Federal Communications Commission (FCC).
PAGE 17
RN171 Transmitter Antenna (from Section 7.1.2 RSS-Gen, Issue 3, December 2010): User manuals for transmitters shall display the following notice in a conspicuous location: Under Industry Canada regulations, this radio transmitter may only operate using an antenna of a type and maximum (or lesser) gain approved for the transmitter by Industry Canada. To reduce potential radio interference to other users, the antenna type and its gain should be so chosen that the equivalent isotropically radiated power (e.i.
PAGE 18
RN171 The R&TTE Compliance Association provides guidance on modular devices in document Technical Guidance Note 01 available at: http://www.rtteca.com/html/download_area.htm Note: 4.3.1 facturer’s installation instructions requires no further evaluation under Article 3.2 of the R&TTE Directive and does not require further involvement of an R&TTE Directive Notified Body for the final product. [Section 2.2.
PAGE 19
RN171 4.4 Australia The Australia radio regulations do not provide a modular approval policy similar to the United States (FCC) and Canada (IC). However, RN171 module RF transmitter test reports can be used in part to demonstrate compliance in accordance with ACMA Radio communications “Short Range Devices” Standard 2004 (The Short Range Devices standard calls up the AS/NZS 4268:2008 industry standard). The RN171 module test reports can be used as part of the product certification and compliance folder.
PAGE 20
RN171 4.7 Taiwan The RN171 module has received compliance approval in accordance with the Telecommunications Act. Customers seeking to use the compliance approval in their product should contact Microchip Technology sales or distribution partners to obtain a Letter of Authority. Integration of this module into a final product does not require additional radio certification provided installation instructions are followed and no modifications of the module are allowed. 4.
PAGE 21
RN171 5.0 ELECTRICAL CHARACTERISTICS TABLE 5-1: ENVIRONMENTAL CONDITIONS Parameter Value Temperature Range (Operating) -40o C-85o C Temperature Range (Storage) -40o C-85o C Relative Humidity (Operating) 90% Relative Humidity (Storage) 90% Moisture Sensitivity Level TABLE 5-2: 1 ELECTRICAL CHARACTERISTICS (PROVISIONAL) Supply Voltage Min Typ Max Units Supply Voltage (VBATT Option) 3.0 3.3 3.7 VDC Digital Input 2.3 Input Logic High VIH VDC Input Logic Low VIL 1.
PAGE 22
RN171 TABLE 5-5: RADIO CHARACTERISTICS Parameters Specification Frequency 2.412 to 2.462 GHz Modulation 802.11b Compatibility: DSSS (CCK-11, CCK-5.5, DQPSK-2, DBPSK-1) 802.11g: OFDM Channel Intervals 5 MHz Channels 1-11 Transmission Rate (Over the Air) 1-11 Mbps for 802.11b/6-54 Mbps for 802.11g Receive Sensitivity -83 dBm Typical Output Level (Class1) -2 dBm to +12 dBm (Configurable via Software) TABLE 5-6: Note 1: TRANSMITTER AC CHARACTERISTICS Output Power 802.
PAGE 23
RN171 APPENDIX A: REVISION HISTORY Revision A (February 2014) This is the initial released version of the document in the Microchip format. This replaces Roving Networks RN171 Data Sheet.  2014 Microchip Technology Inc.
PAGE 24
RN171 NOTES: DS70005171A-page 24  2014 Microchip Technology Inc.
PAGE 25
RN171 THE MICROCHIP WEB SITE CUSTOMER SUPPORT Microchip provides online support via our WWW site at www.microchip.com. This web site is used as a means to make files and information easily available to customers.
PAGE 26
RN171 NOTES: DS70005171A-page 26  2014 Microchip Technology Inc.
PAGE 27
RN171 PRODUCT IDENTIFICATION SYSTEM To order parts, including industrial, or obtain information, for e.g., on pricing or delivery, refer to the factory or the listed sales office. PART NO. I RM Device Temp Range Radio Module XXX Firmware F Revision Number Device RN171; VDD range 3.0V to 3.7V Temperature Range I = -40C to +85C (Industrial Temperature)  2014 Microchip Technology Inc.
PAGE 28
RN171 NOTES: DS70005171A-page 28  2014 Microchip Technology Inc.
PAGE 29
Note the following details of the code protection feature on Microchip devices: • Microchip products meet the specification contained in their particular Microchip Data Sheet. • Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions. • There are dishonest and possibly illegal methods used to breach the code protection feature.
PAGE 30
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