MRF24WN0MA datasheet(11/36 Pages) MICROCHIP

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DS50002410A-page 11

MRF24WN0MA/MB

2.0

CIRCUIT DESCRIPTION

2.1

Overview

The MRF24WN0MA/MB module interfaces to the

PIC32 MCU via a 4-wire SPI port, Interrupt and Hiber-

nate

pins

illustrated

Figure 2-1.

The

MRF24WN0MA/MB modules are designed to work

with Microchip's MPLAB® Harmony Integrated Soft-

ware Framework. The integrated framework imple-

ments the Application Programming Interface (API)

that is used for command and control, management

and data packet traffic.

The MPLAB Harmony basic framework is available via

a free download from the Microchip web site at

http://www.microchip.com/harmony. For more informa-

tion on the basic framework and available release ver-

sions, refer to the “MPLAB Harmony Release Notes

and Contents” found under the Documentation tab.

If you are new to the MPLAB Harmony framework, visit

http://www.microchip.com/harmony and go to the

Training > Getting Started tab.

The MPLAB Harmony Help document is available for

download from the MPLAB Harmony framework direc-

tory: c:\microchip\harmony\<version>\doc.

The PIC32 input/output ports (SPI, Interrupt and Hiber-

nate) are configured in the MPLAB Harmony frame-

work configuration files as described in the MPLAB

Harmony Help document.

2.2

MODE0 and MODE1 Pins

The MODE pins must be tied to the voltage levels for

normal operation of the module. Refer to Table 2-1.

The MODE pins are sampled at power on and wake-

up. Refer to Section 2.6, "Hibernate". In the case of

SPI_CS/MODE1 pin, pull-up using a 10 k

 resistor and

the host MCU allows an active-high signal during

power on and wake-up to ensure that the module start-

up in normal operation. Once the module is

operational, the pin becomes the SPI Port Chip Select

pin (active-low).

FIGURE 2-1:

HARMONY TO MRF24WN0MA/MB BLOCK DIAGRAM

TABLE 2-1:

MODE PIN OPERATION

Condition

MODE0

Connect to GND

SPI_CS/MODE1

Connect to VDD via 10 k



pull-up resistor

Application(s)

TCP/IP Stack

Wi-Fi Driver

PLIB

PIC32

MRF24WN0MA/MB

Power

Ground

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