TWR-WIFI-AR4100 - Freescale Semiconductor
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1. e Qualcomm Atheros world class leading 802 11n Wi Fi Integrated high power high efficiency Power Amplifier Low Density Parity Check LDPC encoding for improved uplink robustness over range Space Time Block Coding STBC for improved downlink robustness over range Wi Fi Protected Setup WPS 2 0 e Compatible with the Tower System including MQX based driver support e SPI interface to Tower MCU modules e On board SPI Flash for enabling minimal impact to MCU resources TWRWIFIAR4100UM TWR WIFI AR4100 User s Manual Page 3 of 10 7 freescale semiconductor A block diagram for the TWR WIFI AR4100 is shown in the figure below On board Antenna Qualcomm Atheros External AR41 00 Antenna ultra low power single stream Connector 1x1 IEEE 802 11n Serial Flash e en oO e O De AVA EE e qe cO a Ln gt LLI LL am TWR WIFI AR4100 Figure 2 TWR WIFI AR4100 Block Diagram The TWR WIFI AR4100 module connects to the Freescale Tower platform using the SPI interface and can be easily integrated using the TCP IP stack of the Freescale MQX system 2 Reference Documents The documents listed below should be referenced for more information on the Freescale Tower system and the TWR WIFI AR4100 Refer to http www freesale com tower for the latest revision of all Tower documentation e TWR2. jumpers that can be used to as test points to measure the voltage as well and current consumption Jumper Voltage Measurement Description Name Reference Used to measure the power consumption of the entire TWR WIFI AR4100 including AR4100 Serial Flash amp 3 3V gt 1 8V Power Regulator including the AR4100 amp 3 3V gt 1 8V Power Regulator Used to measure the Power consumption of the 1 8V rail of the AR4100 J1 Used to measure the power consumption of the AR4100 li 3 3 On board Serial Flash The TWR WIFI AR4100 includes a 16 Mbit Serial Flash memory The Qualcomm Atheros AR4100 interfaces directly with the Serial Flash allowing the AR4100 to access the required drivers and programming information with minimal impact to the MCU If required the TWR WIFI AR4100 allows the interface to be switched from the AR4100 to the Tower MCU via the TWR ELEV connections The interface to the Serial Flash can be switched by removing the following resistors R32 R33 R34 R35 and populating the following resistors R24 R25 R26 R27 Refer to the TWR WIFI AR4100 for additional details TWRWIFIAR4100UM TWR WIFI AR4100 User s Manual Page 6 of 10 e e freescale semiconductor 3 4 Debug UART Header For advanced debug purposes the TWR WIFI AR4100 provides access to a UART signals on J10 The following signals are accessible a J10 sn J
3. 22 UN 5 O O j Debug UART RX 6 5 10 o 8 7 m en ou NH AA Debug UART TX 12 OO 11 SPI Flash CS Figure 5 Debug UART Header The Debug UART RX signal is not configured as a UART signal by the AR4100 firmware Prior to firmware reconfiguring this pin DEBUG_UART_RX must not be connected to any external stimulus Jumper J22 is provided to isolate DEBUG_UART_RX from J10 This allows the required debug hardware UART transceiver to remain connected to J10 requiring the user to only remove the J22 shunt when the part is reset 3 5 Elevator Connections The TWR WIFI AR4100 features two expansion card edge connectors that interface to Elevator boards in a Tower system the Primary and Secondary Elevator connectors The Primary Elevator connector comprised of sides A and B is utilized by the TWR WIFI AR4100 while the Secondary Elevator connector only makes connections to ground GND Table 1 provides the pinout for the Primary Elevator Connector An X in the Used column indicates that there is a connection from the TWR WIFI AR4100 to that pin on the Elevator connector An X in the Jmp column indicates that a jumper is available that can configure or isolate the connection from the Elevator connector TWRWIFIAR4100UM TWR WIFI AR4100 User s Manual Page 7 of 10 e poss lt freescale semiconductor Table 1 TWR WIFI AR4100 Primary Elevator Connector Pin out TWR WIFI AR4100 Primary C
4. 4100 User s Manual Page 10 of 10
5. VO s fre escale semicon ductor TWR WIFI AR4100 User s Manual Rev 1 1 Freescale Semiconductor Inc TWRWIFIAR4100UM o 7 freescale semiconductor Contents 1 Overview 2 Reference Documents 3 Hardware Features 3 11 AR4100 Module SAS ASE 0 O en nO o ES UE 1 E EE 3 3 On board Serial Flash SE Se VART HCCI ER hEEEHRFTRrRrRERRREERFFRTRTT T FTPE 3 5 Elevator Connections 4 Jumper Table Revision History Revision Date Changes Jun 2011 Initial Release August 2011 Updated to reflect Qualcomm Atheros and WPS 2 0 support TWRWIFIAR4100UM TWR WIFI AR4100 User s Manual Page 2 of 10 7 freescale semiconductor 1 Overview The Qualcomm Atheros Wi Fi Tower Module TWR WIFI AR4100 is a low cost evaluation demonstration and development board that features an ultra low power 802 11n solution from Qualcomm Atheros TW NDAR Figure 1 TWR WIFI AR4100 Image The TWR WIFI AR4100 Wi Fi Tower System module features the AR4100 solution from Qualcomm Atheros The following is a brief summary of the TWR WIFI AR4100 s features e The Qualcomm Atheros AR4100 an ultra low power single stream 1x1 IEEE 802 11n System in package featuring e Low energy and Low system resource requirements e Simple low cost wireless system integration Near zero RBOM Integrated RF front end RF shield and clocks Direct connect to a 50 ohm antenna FCC and Wi Fi Certified
6. WIFI AR4100 Quick Start Guide e TWR WIFI AR4100 Lab Tutorial e TWR WIFI AR4100 Schematics For technical documents specific to the Qualcomm Atheros Wi Fi module refer to http www qca qualcomm com 3 Hardware Features This section provides more details about the features and functionality of the TWR WIFI AR4100 TWRWIFIAR4100UM TWR WIFI AR4100 User s Manual Page 4 of 10 7 freescale semiconductor Primary Elevator Connector Tower Configuration Jumpers i Expansion GPIO Header Serial Flash Onboard Antenna External Antenna Connector Secondary Elevator Qualcomm Atheros Connector AR4100 802 11n Figure 3 Callout Diagram for TWR WIFI AR4100 3 1 AR4100 Module The AR4100 is a small form factor single stream 802 11 b g n Wi Fi System in Package SIP solution The AR4100 has been developed to support applications hosted by low resource microcontrollers that send infrequent data packets over the network Typically these 802 11 applications will place a higher priority on system cost power consumption ease of use and fast wake up times as compared to high throughput The AR4100 integrates all Wi Fi functionality into a low profile 8 3mm x 9 2mm LGA package that can be easily mounted via low cost PCB manufacturing flows The device requires only a few external bypass capacitors and a connection to an antenna for a board level design As an added cost reduction and convenience the SIP module is pre cert
7. d for isolation configuration and feature selection Refer to the following table for details The default installed jumper settings are shown in bold Option Setting Description Supply 3 3V to AR4100 via Tower Elevator J1 can be used as AR4100 Power Source p a measurement point for AR4100 specific power usage Selection 2 3 Not Used On board power regulation is not implemented by default AR4100 1 8V Power p Supply 1 8V to the AR4100 J2 can be used as a measurement Regulation gig point specific to the AR4100 1 8V AR4100 Power Down 1 2 Power down the AR4100 NAS Tower System RSTOUT_b will control reset power down of AR4100 Reset Power AR4100 Down Selection Tower System GPIO3 will control reset power down of 23 AR4100 Interrupt Select IRQ_G Tower System IRQ_G will connect to AR4100 SPI_INT 1 2 Interrupt Select IRQ_E 1 2 Tower System IRQ_E will connect to AR4100 SPI_ INT Interrupt Select IRQ C 1 2 Tower System IRQ_C will connect to AR4100 SPI INT Interrupt Select IRQ_A 1 2 Tower System IRQ_A will connect to AR4100 SPI_INT Connects Debug UART RX from AR4100 to J10 This jumper Debug UART RX Enable 1 2 should not be connected until after SW reconfigures signals as UART RX Supply 3 3V to TWR WIFI AR4100 via Tower Elevator J23 can be used as a measurement point for the entire TWR WIFI AR4100 module J11 J2 J16 J15 J14 J13 J22 TWR WIFI AR4100 Power Connection TWRWIFIAR4100UM TWR WIFI AR
8. ified with the FCC and other major regulatory bodies The AR4100 employs the world s lowest power consumption embedded architecture It has been optimized for client applications in the home and enterprise that have lower data rates and transmit or receive data on an infrequent basis The AR4100 features standby current consumption as low as SUA Additional optimizations including a reduced host driver footprint allow easy integration with low cost microcontrollers The AR4100 also includes Qualcomm Atheros industry leading high efficiency high output EPA power amplifier with zero calibration and integrated LNAs RF matching circuits a reference crystal and a T R switch are also integrated eliminating the need for an external RF components and thus enabling direct antenna connection The end result is a device that is the best in class for ease of system design TWRWIFIAR4100UM TWR WIFI AR4100 User s Manual Page 5 of 10 7 freescale semiconductor a SPI Slave mm Host I F SPI Master lt Q NVRAMI F tama UART D Debug Ports m 5 m GPIO o gt OManagement E co E lt Battery Power Management System Controller 32kHz Sleep Clock System Clock x y Figure 4 AR4100 Block Diagram 3 2 System Power The TWR WIFI AR4100 is powered by 3 3V from the Primary Elevator connector There are number of
9. onnector Side A Usage Name Usage Used Jmp e es CAE x a omw EAT pes 33v laavpower x x as asw o 33vPower x x Ba ELE ps sense EtevatorPowersense a 33w 33vPower x x es en aroma x as e Ground S x O pee eno arma x as emo Ground S x Far sencas seriaro x am suo Ps sncsi soncicn aj o Duo sen cso somcicso sevatrisnsecs x aa eno em areioocpor x x mxo spa mosi sonci cmo Seriatrisn ser Mos x mo cpios soucor Loan spn MISOJSDHCL DO serial rieshspimiso x au coo7 soweon Mechanical Key uo mc mw wa meer O ts mw SC a ma TO aa emo Pes emo sl mem Pos mener ae mew wr mos O Jr mem 7 Pow emo us mew wo emo am mw SS amo emo amm mew pen eno araioocnoo x x am semu um eme O Pr sem Ces aos amemo x x as se an ow TT a mo I es won Js sine 826 GND aroma x ax a Eu 0 ABS poe A36 3 3V 3 3V Power REC TES PE pass TS IMEI fn A EJ MJ Ground SJ EI A 90 TN Ground ASA ee A34 RN MJ a3VPower mo mn AA xf pT a I NN EEN P se E NE AAA UE o E I xx NN a DA NN MN NN am RIDO y TWRWIFIAR4100UM TWR WIFI AR4100 User s Manual Page 8 of 10 7 freescale semiconductor TWR WIFI AR4100 P
10. rimary Connector Side B Side A Usage Used Pin Name TXDO A43 RXD1 Pin Name Used CANTX Usage Jmp B42 B43 1WIRE B82 A82 3 3V 3 3V Power Ww lt 3 3V Power ara w O ewe a em e eu somo ammo x aw me eis sonos arasoosrmiso x me eo we seco arssooseres x we e we soa waosa x we eo Pes co emus x wo cnn sme wo su oJ eo ewe eo eo aer o AE O O EE Coss use or room aes ono Cosa use om poown O aa vee CC we ac amm x ase ww er mar po er veve e Cosa mar amm x x ass we Paco mac amm x x ao wee S s e me Lo er we o Paco maa amesw x x ag arms ee meo me ww ees ano sme x as e sm ee mes mane er eee aer ems O we eem ae emo PE EE EE es ewe ae emu Cid wo eeo mw emo S en we al eeo e m ee am eme e ee or a er e es fos aes ems y we e we eme e e e fom res e wo fem we em e wo eo ao emo l O er omo eme x aer e sme a saveowr x x saveower x x TWRWIFIAR4100UM TWR WIFI AR4100 User s Manual Page 9 of 10 e w freescale semiconductor 4 Jumper Table There are several jumpers provide
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