MRF24J40 datasheet(5/152 Pages) MICROCHIP

Part #	MRF24J40

Description	IEEE 802.15.4??2.4 GHz RF Transceiver

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Manufacturer	MICROCHIP [Microchip Technology]

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Preliminary

DS39776B-page 3

MRF24J40

1.0

OVERVIEW

The MRF24J40 is an IEEE 802.15.4™ Standard com-

pliant 2.4 GHz RF transceiver. It integrates the PHY

and MAC functionality in a single chip solution.

Figure 1-1 shows a simplified block diagram of a

MRF24J40 wireless node. The MRF24J40 creates a

low-cost, low-power, low data rate (250 or 625 kbps)

Wireless Personal Area Network (WPAN) device. The

MRF24J40 interfaces to many popular Microchip PIC®

microcontrollers via a 4-wire serial SPI interface,

interrupt, wake and Reset.

The MRF24J40 provides hardware support for:

•Energy Detection

• Carrier Sense

• Three CCA Modes

• CSMA-CA Algorithm

• Automatic Packet Retransmission

• Automatic Acknowledgment

• Independent Transmit, Beacon and GTS FIFO

Buffers

• Security Engine supports Encryption and

Decryption for MAC Sublayer and Upper Layer

These features reduce the processing load, allowing

the use of low-cost 8-bit microcontrollers.

The

MRF24J40

is

compatible

with

Microchip's

ZigBee®, MiWi™ and MiWi P2P software stacks. Each

software stack is available as a free download, includ-

ing source code, from the Microchip web site:

http://www.microchip.com/wireless.

FIGURE 1-1:

WIRELESS NODE BLOCK DIAGRAM

Matching

Circuitry

Antenna

I/O

SDO

SDI

SCK

INTx

I/O

PIC

® MCU

PHY

MAC

20 MHz

Crystal

SDI

SDO

SCK

INT

WAKE

CS

RESET

RFP

RFN

MRF24J40

Power

Management

Memory

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MRF24J40 Datasheet(PDF) 5 Page - Microchip Technology

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