MICROCHIP WFI32-IoT Development Board User Manual
- June 17, 2024
- MICROCHIP
Table of Contents
**MICROCHIP WFI32-IoT Development Board User Manual
**
This document covers the Regulatory Compliance information which will be part of the WFI32E02 Module datasheet and related documents shared with customers.
Antenna Considerations
Table 1-1 provides the list of Approved antennas along with the manufacturer and part number details.
Slno.| P/N| Vendor| Antenna Gain @ 2.4GHz
Band| Antenna type| Cable length/ Remarks
---|---|---|---|---|---
1| RFA-02-L2H1| Alead/ Aristotle| 2 dBi| Dipole| 150mm
2| RFA-02-C2H1-D034| Alead/ Aristotle| 2 dBi| Dipole| 150mm
3| RFA-02-D3| Alead/ Aristotle| 2dBi| Dipole| 150mm
4| RFDPA870920IMLB301| WALSIN| 1.84 dBi| Dipole| 200mm
5| RFDPA870920IMAB302| WALSIN| 1.82 dBi| Dipole| 200mm/ Black
6| RFDPA870920IMAB305| WALSIN| 1.82 dBi| Dipole| 200mm/ Grey
7| RFDPA870910IMAB308| WALSIN| 2 dBi| Dipole| 100mm
8| RFA-02-C2M2| Alead/ Aristotle| 2 dBi| Dipole| RP-SMA to u.FL cable length
of 100mm(Refer note 2 and 3)
9| RN-SMA-S-RP| Microchip| 0.56 dBi| Dipole| RP-SMA to u.FL cable length of
100mm.(Refer note 2 and 3)
Note:
- Antenna #1 to #11 are for WFI32E02UC/ WFI32E02UE
- If the end-product using the Module is designed to have an antenna port that is accessible to the enduser than a unique (non-standard) antenna connector (as permissible by FCC) must be used (e.g. RP (Reverse Polarity)-SMA socket).
- If an RF coaxial cable is used between the module RF output and the enclosure, then a unique (nonstandard) antenna connector must be used in the enclosure wall for interface with antenna.
WFI32E02 Usage Instructions under Modular Approval
Table 1-2: Features and supported modes of operation
| Frequency Range | Wi-Fi: 2.400 GHz ~ 2.4835 GHz (2.4 GHz ISM Band) |
|---|---|
| Number of Channels | Wi-Fi: 11 for North America |
The availability of some specific channels and/or operational frequency bands
are country dependent and
should be programmed at the Host product factory to match the intended
destination. Regulatory bodies prohibit exposing the settings to the end user.
This requirement needs to be taken care of via Host implementation.
The Host product manufacturer must ensure that the RF behavior adheres to the certification (e.g. FCC, ISED) requirements when the module is installed in the final Host product.
WFI32E02 Usage Instructions under Modular Approval
Host Board Top Layer Instructions:
PCB keep out area for RF Test Point
PCB keep out area for Test Point
The top layer (underneath the module) of the host PCB must be ground with as many GND vias as possible.
United States
The WFI32E02 modules have received Federal Communications Commission (FCC) CFR47 Telecommunications, Part 15 Subpart C “Intentional Radiators” single- modular approval in accordance with Part 15.212 Modular Transmitter approval. Single modular transmitter approval is defined as a complete RF transmission sub-assembly, designed to be incorporated into another device, that must demonstrate compliance with FCC rules and policies independent of any host. A transmitter with a modular grant can be installed in different end-use products (referred to as a host, host product, or host device) by the grantee or other equipment manufacturer, then the host product may not require additional testing or equipment authorization for the transmitter function provided by that specific module or limited module device.
The user must comply with all of the instructions provided by the Grantee, which indicate installation and/or operating conditions necessary for compliance. Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.
A host product itself is required to comply with all other applicable FCC equipment authorization regulations, requirements, and equipment functions that are not associated with the transmitter module portion. For example, compliance must be demonstrated: to regulations for other transmitter components within a host product; to requirements for unintentional radiators (Part 15 Subpart B), such as digital devices, computer peripherals, radio receivers, etc.; and to additional authorization requirements for the non- transmitter functions on the transmitter module (i.e., SDoC or Certification) as appropriate (e.g., Bluetooth and Wi-Fi transmitter modules may also contain digital logic functions).
Labeling and User Information Requirements
The WFI32E02 module has been labeled with its own FCC ID number. If the FCC ID is not visible when the module is installed inside another device, then the outside of the finished product into which the module is installed must display a label referring to the enclosed module. This exterior label can use wording as follows:
For the WFI32E02UE, WFI32E02UC:
Contains Transmitter Module FCC ID: 2ADHKWFI32E02 or Contains
FCC ID: 2ADHKWFI32E02
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.
A user’s manual for the finished product should include the following statement:
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 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 receiver
- Connect the equipment into 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
Additional information on labeling and user information requirements for Part 15 devices can be found in KDB Publication 784748, which is available at the FCC Office of Engineering and Technology (OET) Laboratory Division Knowledge Database (KDB) https://apps.fcc.gov/oetcf/kdb/index.cfm.
RF Exposure
All transmitters regulated by FCC must comply with RF exposure requirements. KDB 447498 General RF Exposure Guidance provides guidance 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).
From the FCC Grant: Output power listed is conducted. This transmitter is restricted for use with the specific antenna(s) tested in this application for Certification.
In the end product, the antenna(s) used with this transmitter must be installed to provide a separation distance of at least 20 cm from all persons and must not be co-located or operation in conjunction with any other antenna or transmitter. User and installers must be provided with antenna installation instructions and transmitter operating conditions for satisfying the RF exposure compliance.
Approved Antenna Types
To maintain modular approval in the United States, only the antenna types that
have been tested shall be used. It is permissible to use a different antenna,
provided the same antenna type and antenna gain (equal to or less than) is
used. An antenna type comprises antennas having similar in-band and out-of
band radiation patterns.
Antennas approved for WFI32E02 module with the antenna types are listed in Table 1-1.
Helpful Websites
Federal Communications Commission (FCC): http://www.fcc.gov FCC Office
of Engineering and Technology (OET) Laboratory Division Knowledge Database
(KDB): https://apps.fcc.gov/oetcf/kdb/index.cfm
Canada
The WFI32E02 module has been certified for use in Canada under Innovation, Science and Economic Development Canada (ISED, formerly Industry Canada) Radio Standards Procedure (RSP) RSP-100, Radio Standards Specifi- cation (RSS) RSS- Gen and RSS-247. Modular approval permits the installation of a module in a host device without the need to recertify the device.
Labeling and User Information Requirements
Label Requirements (from RSP-100 Issue 11, Section 3): The host device shall be properly labeled to identify the module within the host device.
The Innovation, Science and Economic Development Canada certification label of a module shall be clearly visible at all times when installed in the host device, otherwise the host device must be labeled to display the Innovation, Science and Economic Development Canada certification number of the module, preceded by the words “Contains”, or similar wording expressing the same meaning, as follows:
For the WFI32E02UE, WFI32E02UC:
Contains transmitter module IC: 20266-WFI32E02 Wireless MCU Module with IEEE® 802.11 b/g/n .
User Manual Notice for License-Exempt Radio Apparatus (from Section 8.4 RSS- Gen, Issue 5, April 2018): User manuals for license-exempt radio apparatus shall contain the following or equivalent notice in a conspicuous location in the user manual or alternatively on the device or both:
This device contains licence-exempt transmitter(s)/receiver(s) that comply with Innovation, Science and Economic Development Canada’s licence-exempt RSS(s). Operation is subject to the following two conditions:
- This device may not cause interference, and
- This device must accept any interference, including interference that may cause undesired operation of the device.
Transmitter Antenna (From Section 6.8 RSS-GEN, Issue 5, April 2018): User manuals, for transmitters shall display the following notice in a conspicuous location:
This radio transmitter [IC: 20266-WFI32E02] has been approved by Innovation, Science and Economic Development Canada to operate with the antenna types listed below, with the maximum permissible gain indicated. Antenna types not included in this list that have a gain greater than the maximum gain indicated for any type listed are strictly prohibited for use with this device.
Immediately following the above notice, the manufacturer shall provide a list of all antenna types approved for use with the transmitter, indicating the maximum permissible antenna gain (in dBi) and required impedance for each.
RF Exposure
All transmitters regulated by ISED must comply with RF exposure requirements listed in RSS-102 – Radio Frequency (RF) Exposure Compliance of Radio communication Apparatus (All Frequency Bands).
This transmitter is restricted for use with a specific antenna tested in this application for certification, and must not be co-located or operating in conjunction with any other antenna or transmitters within a host device, except in accordance with Canada multi-transmitter product procedures.
The module antenna must be installed to meet the RF exposure compliance
separation distance of “20 cm” and any additional testing and authorization
process as required.
The host integrator installing this module into their product must ensure that
the final composite product complies with the ISED requirements by a technical
assessment.
Approved Antenna Types
Antennas approved for WFI32E02 module with the antenna types are listed in
Table 1-1.
Helpful Web Sites
Industry Canada: http://www.ic.gc.ca/
References
- Language selection - Innovation, Science and Economic Development Canada Main Site / Sélection de la langue - Site principal d'Innovation, Sciences et Développement économique Canada
- OET Knowledge Database (KDB)
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