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WFM200S Data Sheet

The Silicon Labs WFM200S is an Ultra Low Power Wi-Fi

transceiver or network co-pro-

cessor (NCP) SiP module targeted for applications where optimal RF performance, low-

power consumption, and secure end-to-end solution, together with fast time to market,

are key requirements.

The very compact 6.5mm x 6.5mm WFM200S SiP module contains an embedded an-

tenna, high frequency crystal, and shield. This all-inclusive module offer the fastest time

to market.

The WFM200S integrates a balun, T/R switch, LNA and PA for the best possible RF per-

formance. Co-existence with external 2.4GHz transceivers is supported via a PTA inter-

face.

WFM200S has been optimized for resource and power constrained devices at the RF,

protocol and firmware levels. Power conscious devices can take advantage of these fea-

tures in both active and idle/sleep modes.

For security sensitive applications, the WFM200S provides secure boot and a secure,

encrypted host interface. Robust security is made possible with the native integrated

True Random Number Generator and OTP memory for confidential encryption key stor-

age.

The WFM200S fits well witl Linux-based and RTOS-based host processors. WFM200S

supports both the 802.11 split MAC architecture and the 802.11 full MAC software archi-

tecture. WFM200S communicates with the external host controller over the SPI or SDIO

interface.

KEY POINTS

• IEEE 802.11 b/g/n compliant

• Embedded high efficiency antenna

• Integrated crystal and shield

• 105°C ambient temp support

• TX power: up to +15.1 dBm

• RX sensitivity: -96.3 dBm

• Integrated switched antenna diversity

support

• Ultra low power consumption

• Secure and signed software

• Encrypted host interface communication

• Linux and RTOS host support

• Certifications

• CE, FCC, ISED, Japan

• 6.5 x 6.5 mm SiP Module

silabs.com | Building a more connected world. Preliminary Rev. 0.51

This information applies to a product under development. Its characteristics and specifications are subject to change without notice.

Summary of content (46 pages)

PAGE 1
WFM200S Data Sheet The Silicon Labs WFM200S is an Ultra Low Power Wi-Fi® transceiver or network co-processor (NCP) SiP module targeted for applications where optimal RF performance, lowpower consumption, and secure end-to-end solution, together with fast time to market, are key requirements. The very compact 6.5mm x 6.5mm WFM200S SiP module contains an embedded antenna, high frequency crystal, and shield. This all-inclusive module offer the fastest time to market.
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Table of Contents 1. Features List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2. Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3. System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3.2 Wi-Fi Supported 2.4 GHz Bandwidth and Channels . . . . . . . . . . . . . . . . . 7 4. Electrical Specifications .
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10. Tape and Reel Specifications . . . . . . . . . . . . . . . . . . . . . . . . 32 10.1 Tape and Reel Packaging. . . . . . . . . . . . . . . . . . . . . . . . . .32 10.2 Reel and Tape Specifications . . . . . . . . . . . . . . . . . . . . . . . .32 10.3 Orientation and Tape Feed . . . . . . . . . . . . . . . . . . . . . . . . .34 10.4 Tape and Reel Box Dimensions . . . . . . . . . . . . . . . . . . . . . . .
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WFM200S Data Sheet Features List 1. Features List The WFM200S Wi-Fi SiP module key features are listed below. Applications • Industrial, Home and Buidling automation • Home appliances • Security solutions • Retail and Commercial • Commercial transportation • Consumer medical • Sports and Fitness Features • 802.11 b/g/n Wi-Fi NCP including the radio, baseband, MAC, security and host interface • Integrated LNA, PA and Balun • Integrated 38.
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WFM200S Data Sheet Ordering Information 2. Ordering Information This section contains ordering information for WFM200S. Note: The parts may be referred to by the product family friendly name (WFM200S), or by the model names (WFM200SA, WFM200SN), or by the full orderable part numbers throughout this document Table 2.1. WFM200S Ordering Information (R indicates Full Reel) Part Number Description Antenna Type Package WFM200S022XNA2(R) WFM200S 802.11bgn NCP Embedded 6.5x6.
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WFM200S Data Sheet System Overview 3. System Overview 3.1 Introduction WFM200S is a WiFi network co-processor module optimized for RF performance, low energy, and low cost, with two antenna ports, Crystal Oscillator, One Time Programmable Memory, and several GPIOs for interfacing with multi-protocol and RF Front End Module controls. Figure 3.1. WFM200SA Block Diagram Figure 3.2. WFM200SN Block Diagram silabs.com | Building a more connected world. Preliminary Rev. 0.
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WFM200S Data Sheet System Overview 3.2 Wi-Fi Supported 2.4 GHz Bandwidth and Channels Supported operating frequencies and bandwidth Table 3.1. Supported Wi-Fi Modulations, BW, and Channels Parameter Channel Center Frequency Symbol Test Condition Min CHAN Subject to Regulatory Agency 2412 Channel Bandwidth BW — Typ 20 Max Unit 2484 MHz — MHz Note: 1. Channel 14 only supports 1 and 2 Mbps modulations. silabs.com | Building a more connected world. Preliminary Rev. 0.
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WFM200S Data Sheet Electrical Specifications 4. Electrical Specifications All electrical parameters in all tables are specified under the following conditions, unless stated otherwise: • Typical values are based on TA = 25 °C; VVDD_IO, VVDD, VVDD_PA= 3.3V • Radio performance numbers are measured in conducted mode, based on Silicon Labs reference designs • WFM200S features and benefits depend on system configuration and may require specific driver, firmware or service activation. Learn more at https://www.
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WFM200S Data Sheet Electrical Specifications 4.2 Operating Conditions Table 4.2. Recommended Operating Conditions Parameter Symbol Ambient operating temperature Test Condition Min Typ Max Unit TA -40 — 105 °C Junction operating temperature TJ -40 — 125 °C DC supply voltage to VDD_PA1 VVDD_PA 3.0 3.3 3.6 V Nominal supply voltage to VDD VVDD 1.62 1.8 3.6 V Nominal supply voltage to VDD_IO VVDD_IO 1.62 1.8 3.6 V Note: 1.
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WFM200S Data Sheet Electrical Specifications 4.3 Power Consumption Unless otherwise indicated, VVDD_PA = 3.3 V, VVDD = VVDD_IO = 1.8 V. Table 4.3. Power Consumption Parameter Symbol Test Condition TX mode current ITX RX mode current Sleep current on power supply pins1 IRX ISLEEP silabs.com | Building a more connected world. Min Typ Max Unit 802.11.b: 1 Mbps, from VDD_PA at 3.3 V — 99.4 — mA 802.11.b: 11 Mbps, from VDD_PA at 3.3 V — 95.6 — mA 802.11.g: 6 Mbps, from VDD_PA at 3.
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WFM200S Data Sheet Electrical Specifications Parameter Symbol Test Condition Snooze current on power supply pins2 ISNOOZE Shutdown current on power supply pins3 Average current for DTIM=1 Interval Profile4 Average current for DTIM=3 Interval Profile4 ISHUTDOWN ILP_DTIM1 ILP_DTIM3 Average current for DTIM=10 ILP_DTIM10 Interval Profile4 Min Typ Max Unit VDD_PA pin, VVDD_PA = 3.3 V — 66 — nA VDD pin, VVDD = 1.8 V — 1146 — µA VDD_IO pin, VVDD_IO = 3.
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WFM200S Data Sheet Electrical Specifications 4.4.1 RF Transmitter Characteristics Table 4.4. RF Transmitter Characteristics Parameter Symbol RMS output power with com- POUTMAX_RMS_ pliance for antennas up to HPPA 2:1 VSWR Second Harmonic Level for POUT_MAX_PA Setting HD2MAX Carrier Suppression per CSUP 802.11-2012 for POUT_MAX PA setting POUTMAX_VAR_ Test Condition Min Typ Max Unit 802.11b: 1 Mbps — 15.1 — dBm 802.11b: 11 Mbps — 13.0 — dBm 802.11g: 6 Mbps — 12.5 — dBm 802.
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WFM200S Data Sheet Electrical Specifications 4.5.1 RF Receiver Characteristics Table 4.5. RF Receiver Characteristics Parameter Symbol Test Condition Min Typ Max Unit RX Sensitivity for 8% FER (1024 Octet) SENSB 802.11b: 1 Mbps — -96.3 — dBm 802.11b: 11 Mbps — -88.0 — dBm RX Sensitivity for 10% PER (1024 Octet) SENSG 802.11g: 6 Mbps — -91.5 — dBm 802.11g: 54 Mbps — -74.6 — dBm RX Sensitivity for 10% PER (4096 Octet) SENSEN 802.11n: MCS=0 — -91.0 — dBm 802.
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WFM200S Data Sheet Electrical Specifications Parameter Symbol Test Condition Min Typ Max Unit RX Channel Power Indicator Accuracy worst case with input swetp from -60 dBm to RX_SAT RCPITOLS 802.11b: 1 Mbps — -4.5 — dB 802.11g: 6 Mbps — -2.8 — dB 802.11n: MCS=7 — -3.3 — dB RX Channel Power Indicator RCPITOLW Accuracy Worst Case with input signal swept from reference sensitivity to -69 dbm 802.11b: 1 Mbps — -1.3 — dB 802.11g: 6 Mbps — -1.4 — dB 802.11n: MCS=7 — -1.
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WFM200S Data Sheet Electrical Specifications 4.7.2 Digital I/O Terminal Specifications Table 4.7. Digital I/O Terminal Specifications Parameter Symbol Voltage input low (relative to VVDD_IO) Test Condition Min Typ Max Unit VIL — — 30 % Voltage input high (relative to VIH VVDD_IO) 70 — — % Logic low output voltage (rel- VOL ative to VVDD_IO) Sinking 5 mA, VVDD_IO ≥ 1.62 V — — 25 % Logic high output voltage (relative to VVDD_IO) VOH Sourcing 5 mA, VVDD_IO ≥ 1.
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WFM200S Data Sheet Electrical Specifications Table 4.9. Host Interface Speeds Parameter SDIO V2.0 clock rate SPI clock rate Symbol Test Condition Min Typ Max Unit SDRate Host Interface SDIO DS Mode — — 26 MHz Host Interface SDIO HS Mode — — 52 MHz Host Interface SPI — — 52 MHz SPIRate Besides the main host interface signals, a couple of other pins also complement the host interface.
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WFM200S Data Sheet Electrical Specifications 4.8.1 SPI Specification Figure 4.1. SPI Interface Timing Parameters Table 4.10. SPI Interface Timing Specifications Symbol Description Min. Typ. Max. Unit tCLK Clock period 19.231 ns tCLK_HI Clock high 9 ns tCLK_LO Clock low 9 ns tCS_DIS_MI CS disable to MISO. VDDIO = 3.3V 8 ns CS disable to MISO. VDDIO = 1.
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WFM200S Data Sheet Electrical Specifications 4.8.2 SDIO Specification Figure 4.2. SDIO Interface Timing Parameters Table 4.11. SDIO Interface Timing Specifications Symbol Description tCLK_HS Clock period in high speed mode tCLK_DS Clock period in default speed mode tCLK_LO tCLK_HI Min Typ Max Unit Conditions 19.23 ns CL ≤ 20pF 38.
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WFM200S Data Sheet Typical Applications and Connections 5. Typical Applications and Connections 5.1 Typical Application Circuit for SDIO Host Interface Figure 5.1. Typical Application Circuit SDIO Host Interface Note: • The SDIO pin pullup resistors are only required if the Host does not integrate internal pull-ups on SDIO signals as required by the SDIO standard. • Refer to UG395: WFM200S Hardware Design User's Guide for more details on the application circuit. silabs.
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WFM200S Data Sheet Typical Applications and Connections 5.2 Typical Application Circuit for SPI Host Interface Figure 5.2. Typical Application Circuit SPI Host Interface Note: • Refer to UG395: WFM200S Hardware Design User's Guide for more details on the application circuit. silabs.com | Building a more connected world. Preliminary Rev. 0.
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WFM200S Data Sheet Typical Applications and Connections 5.3 Power States and Low-Power Modes The current consumption on WFM200S is highly dynamic. It varies significantly depending on its activity, the activation of power-save modes, and when it is in shutdown. There are four main modes, each of them having several power states as detailed below. Traffic mode: The Traffic mode is defined as the mode when WFM200S is transmitting data, receiving data, or listening to the channel.
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WFM200S Data Sheet Typical Applications and Connections 5.5.2 LP_CLK Port A 32.768KHz clock source should be supplied to LP_CLK pin to enable the lowest power operation in power save modes. The frequency tolerance of this source affects wake up scheduling. 5.6 Multi-Protocol Coexistence In case an RF transceiver using the same 2.4 GHz band (e.g.
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WFM200S Data Sheet Pin Descriptions 6. Pin Descriptions Figure 6.1. WFM200S Pinout Table 6.1. Pin Definitions Pin # Pin Name Pin Type 1 GND GND 2 2G4ANT_IN Analog Embedded 2.4 Ghz antenna Port. To use the embedded antenna, this pin should be connected to RF_1. For OPNs without an embedded antenna, the pin is a No Connect 3 RF_1 Analog RF_1 port + matching. Can be connected to 2G4ANT_IN pin 4-8 GND GND 9 RF_2 Analog RF_2 port + matching.
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WFM200S Data Sheet Pin Descriptions Pin # Pin Name Pin Type Description / Default 14 GPIO/PTA_TX_CONF I/O 15 GPIO/PTA_RF_ACT I/O As part of PTA interface, these pins can be used to manage coexistence with another 2.4 GHz radio, or can be used as GPIO 16 GPIO/PTA_STATUS I/O 17 GPIO/PTA_FREQ I/O 18 LP_CLK Input Low Power clock input. This pin is typically connected to the 32 KHz clock.
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WFM200S Data Sheet Package Outline 7. Package Outline Figure 7.1. WFM200S Package Outline silabs.com | Building a more connected world. Preliminary Rev. 0.
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WFM200S Data Sheet Package Outline Table 7.1. Package Outline Dimensions (in mm) Dimension MIN NORM MAX A 1.20 1.30 1.40 A1 0.26 0.30 0.34 A2 0.95 1.00 1.05 b 0.27 0.32 0.37 D 6.50 BSC e 0.50 BSC E 6.50 BSC L 0.43 0.48 0.53 L1 0.11 0.16 0.21 L2 0.34 0.39 0.44 L3 0.24 0.29 0.34 L4 0.14 0.19 0.24 L5 0.62 0.67 0.72 Dimensions MIN MAX aaa 0.10 bbb 0.10 ccc 0.10 ddd 0.10 eee 0.10 silabs.com | Building a more connected world. NORM Preliminary Rev.
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WFM200S Data Sheet Package Outline Pad Number Pad Coord (X,Y) Pad Size (X,Y) Pad Number Pad Coord (X,Y) Pad Size (X,Y) Note: These coordinates correspond to the BOTTOM view. Please refer to UG395: WFM200S Hardware Design User's Guide for the stencil design. 1 2.850 1.300 0.480 0.320 30 -2.850 2.300 0.480 0.320 2 2.850 0.800 0.480 0.320 31 -2.850 2.800 0.480 0.320 3 2.850 0.300 0.480 0.320 32 -2.250 2.850 0.320 0.480 4 2.850 -0.200 0.480 0.320 33 -1.750 2.850 0.
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WFM200S Data Sheet Package Outline Note: • The dimensions in parenthesis are reference • All dimensions in millimeters (mms) • Unless otherwise specified tolerances are: • Decimal: • X.X = ±0.1 • X.XX = ±0.05 • X.XXX=±0.03 • Angular: ±0.1 (In Deg) • Hatching lines means package shielding area • Pad coordinates located from package center (0,0) • Dimensioning and Tolerance per ANSI Y14.5M-1994 silabs.com | Building a more connected world. Preliminary Rev. 0.
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WFM200S Data Sheet Land Pattern 8. Land Pattern Figure 8.1. WFM200S Land Pattern Table 8.1. PCB Land Pattern Dimension mm b 0.32 D1 5.50 D2 4.77 D3 3.70 D4 2.63 D5 1.65 D6 4.00 D7 0.05 eD1 1.00 eD2 0.60 eD3 0.15 e 0.50 silabs.com | Building a more connected world. Preliminary Rev. 0.
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WFM200S Data Sheet Land Pattern Dimension mm E1 5.70 E2 5.10 E3 2.92 E4 2.85 E5 1.65 E6 4.50 E7 2.40 E8 1.20 E9 4.50 L 0.48 L1 0.67 eE1 0.60 eE2 0.60 Notes: 1. General a. All feature sizes shown are at Maximum Material Condition (MMC) and a card fabrication tolerance of 0.05mm is assumed. b. Dimensioning and Tolerancing is per the ANSI Y14.5M-1994 specification. 2. Stencil Design a.
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WFM200S Data Sheet Top Marking 9. Top Marking Figure 9.1. WFM200S Top Marking Table 9.1. Top Marking Definition OPN Line 1 Marking Line 2 Marking Line 3 Marking WFM200S022XNA2 WFM200SA 200022XNA2 See note below WFM200SS22XNA2 WFM200SA 200S22XNA2 See note below WFM200S022XNN2 WFM200SN 200022XNN2 See note below WFM200SS22XNN2 WFM200SN 200S22XNN2 See note below Note: YY = Year. WW = Work Week silabs.com | Building a more connected world. Preliminary Rev. 0.
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WFM200S Data Sheet Tape and Reel Specifications 10. Tape and Reel Specifications 10.1 Tape and Reel Packaging This section contains information regarding the tape and reel packaging for the WFM200S Module. 10.
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WFM200S Data Sheet Tape and Reel Specifications Figure 10.2. Cover tape information Table 10.2. Cover Tape Dimensions Symbol Dimensions [mm] Thickness (T) 0.061 Width (W) 25.5 + 0.2 Figure 10.3. Tape information silabs.com | Building a more connected world. Preliminary Rev. 0.
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WFM200S Data Sheet Tape and Reel Specifications 10.3 Orientation and Tape Feed The user direction of feed, start and end of tape on reel and orientation of the Modules on the tape are shown in the figures below. Figure 10.4. Module Orientation and Feed Direction 10.4 Tape and Reel Box Dimensions Figure 10.5. Tape and Reel Box Dimensions Table 10.3. Tape and Reel Box Dimensions Symbol Dimensions [mm] W2 368 W3 338 W4 72 10.
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WFM200S Data Sheet Software Reference 11. Software Reference This section gives a short overview of the software involved to run applications based on this device. The firmware running in the WFM200S allows it to be used at Lower MAC level (in split MAC) or at the Upper Mac level (in Full MAC). 11.1 Host and Device Software This device is intended to be used as a Network Co-Processor (NCP) which means that it requires a host processor to run the application.
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WFM200S Data Sheet Software Reference 11.1.2 Full MAC In this scenario, both the lower MAC and upper MAC are running in WFM200S. The WFM200S contains a WPA/WPA2 personal supplicant, allowing it to handle full MAC responsibilities without utilizing the host MCU. The host receives an IP packet and implements all stack layers necessary above it. The figure below shows the typical software architecture in Full MAC implementations. Figure 11.2.
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WFM200S Data Sheet Software Reference 11.2.2 Secure Boot Secure Boot includes several features related to boot and firmware security. Firmware authentication and encryption do not have any impact on host software, whereas firmware roll back prevention requires more flexibility and is managed by each customer through software. • Firmware authentication: The downloaded firmware is authenticated such that only Firmware provided by Silicon Labs can run in WFM200S.
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WFM200S Data Sheet Software Reference 11.3.3 Shutdown Mode The shutdown mode can be used if the Wi-Fi feature is not needed for a long period of time. This mode achieves the lowest current consumption on the device but requires a full power-up reset and boot sequence to come back to the operational mode. This mode should be initiated by the host. Note: A similar behavior could be achieved by asserting RESETn pin low, but would draw more current. silabs.com | Building a more connected world.
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WFM200S Data Sheet Certifications 12. Certifications This section details certification status of the module in various regions. The address for the module manufacturer and certification applicant is: SILICON LABORATORIES FINLAND OY Alberga Business Park, Bertel Jungin aukio 3, 02600 Espoo, Finland 12.1 Qualified External Antenna Types This device has been certified with an embedded antenna with an external loop as well as external dipole whip antennas connected to either RF port or both.
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WFM200S Data Sheet Certifications 12.3 FCC 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 undesirable operation. Any changes or modifications not expressly approved by Silicon Labs could void the user’s authority to operate the equipment.
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WFM200S Data Sheet Certifications 12.4 ISED Canada ISED This radio transmitter (WFM200S) has been approved by Innovation, Science and Economic Development Canada (ISED Canada, formerly Industry Canada) to operate with the antenna types listed above, with the maximum permissible gain indicated. Antenna types not included in this list, having a gain greater than the maximum gain listed, are strictly prohibited for use with this device. This device complies with ISED’s license-exempt RSS standards.
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WFM200S Data Sheet Certifications ISED (Français) ISED a approuvé l’utilisation de cet émetteur radio (WFM200S) en conjonction avec des antennes de type dipolaire à 2.14dBi ou de son antenne intégrée. L’utilisation de tout autre type d’antenne avec ce composant est proscrite. Ce composant est conforme aux normes RSS, exonérées de licence d'ISED. Son mode de fonctionnement est soumis aux deux conditions suivantes: 1. Ce composant ne doit pas générer d’interférences. 2.
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WFM200S Data Sheet Certifications 12.5 Japan The WFM200S modules are certified in Japan with certification number 006-000781 Since September 1, 2014 it is allowed (and highly recommended) that a manufacturer who integrates a radio module in their host equipment places the certification mark and certification number on the outside of the host equipment (same marking/number might also appear on the label of the radio module).
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WFM200S Data Sheet Certifications 12.6 Locating the Module Close to Human Body When using the module in an application where the radio is located close to human body, the human RF exposure must be evaluated. FCC, ISED, and CE all have different standards for evaluating the RF exposure, and because of this, each standard will require a different minimum separation distance between the module and human body. Certification of WFM200S allows for the minimum separation distances detailed in Table 12.
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WFM200S Data Sheet Revision History 13. Revision History Revision 0.51 October 2019 • Minor updates to Certifications section September 2019 • Updated Sections 2,3, and 5 with new text • Minor specification updates in section 4 Revision 0.3 July 2019 • Updated Pin Descriptions, Package Outline and Land Pattern sections with new pinout Revision 0.31 August 2019 • Updated pin description for pin 47 Revision 0.32 August 2019 • Added Certifications section Revision 0.5 silabs.
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