310-027

1300 Henley Court Pullman, WA 99163 509.334.6306 www.digilentinc.com PmodWiFi™ Reference Manual Revised January 7, 2015 This manual applies to the PmodWiFi rev. B Overview The PmodWiFi is an interface board for the Microchip® MRF24WB0MA Wi-Fi™ radio transceiver module. Features include:         IEEE 802.11-compliant RF transceiver Serialized unique MAC address Data rate: 1 and 2Mbps IEEE 802.11b/g/n-compatible Integrated PCB antenna Range: up to 400m (1300 ft.) Radio regulation certification for the United States (FCC), Canada (IC), Europe (ETSI), and Japan (ARIB) Wi-Fi certified (WFA ID: WFA7150) The PmodWiFi. 1 Functional Description The PmodWiFi provides IEEE 802.11b/g/n support for embedded applications at data rates of 1 and 2Mbps. It is designed for use with Microchip microcontroller families (PIC18, PIC24, dsPIC33, and PIC32) and the Microchip TCP/IP Stack (a free Microchip Application Libraries download including example applications and source code). The TCP/IP Stack is available at www.microchip.com/wireless. 1.1 Interface The primary communications interface with the PmodWiFi is an SPI bus. An RST pin provides the host with an active low, asynchronous hardware reset for the PmodWiFi. The PmodWiFi also provides an active low interrupt indicator pin (~INT), which is asserted low by the PmodWifi when data is available for the host device. The ~INT line is de-asserted high after the data transfer is complete. The SPI SCK speed can be up to 25 MHz. DOC#: 502-194 Copyright Digilent, Inc. All rights reserved. Other product and company names mentioned may be trademarks of their respective owners. Page 1 of 2 PmodWiFi™ Reference Manual Connector J1 – SPI Communications Pin Signal Description 1 ~SS Slave Select 2 3 MOSI MISO Master out/Slave in Data Master in/Slave out Data 4 SCK Serial Clock 5 6 7 GND VCC ~INT Power Supply Ground Power Supply (3.3V) Interrupt Output 8 9 10 ~RST ~WP HIB Hardware Reset Write Protect Hibernate 11 GND Power Supply Ground 12 VCC Power Supply (3.3V) Interface connector signal description. The SPI interface standard uses four signal lines. These are slave select (~SS), master out slave in (MOSI), master in slave out (MISO), and serial clock (SCK). These signals map to the following signals on the MRF24WB0MA: ~SS corresponds to the Chip Select signal (~CS), MOSI corresponds to Serial Data Input (SDI), MISO corresponds to Serial Data Output (SDO), and SCK corresponds to the Serial Clock signal (SCK). 1.2 Power Supply The PmodWiFi is designed to work with Digilent microcontroller boards that have 12-pin header connectors. The PmodWiFi requires a 2.7V-3.6V supply voltage. A 3.3V power supply voltage is available on all Digilent system boards and is provided as part of the 12-wire Pmod interface standard. Digilent system boards with Pmod interface connectors allow jumper selection of the power supply voltage being provided to the Pmod. Ensure that the system board is jumpered to provide 3.3V to the module before applying power to the board. For more information on the MRF24WB0MA, see the MRF24WB0MA datasheet which can be accessed on Microchip's website. Copyright Digilent, Inc. All rights reserved. Other product and company names mentioned may be trademarks of their respective owners. Page 2 of 2 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Digilent: 310-027P