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MRF24J40MC
1.0 DEVICE OVERVIEW
The MRF24J40MC is a 2.4 GHz IEEE Std. 802.15.4?
compliant, surface mount module with integrated
crystal, internal voltage regulator, matching circuitry,
Power Amplifier (PA), Low Noise Amplifier (LNA) with
50 ? external antenna connector. The MRF24J40MC
module operates in the non-licensed 2.4 GHz
frequency band. The integrated module design frees
The MRF24J40MC module has been tested and
conforms to ETS EN 300 328 V1.7.1 (2006-10)
European Standards. The module tests can be applied
toward final product certification and Declaration of
Conformity (DoC). To maintain conformance for
Europe, refer to module settings in Section 3.3.1
“MRF24J40MC Settings” . Additional testing may be
required depending on the end application.
the integrator from extensive RF and antenna design,
and regulatory compliance testing allowing quicker
1.1
Interface Description
time to market.
The MRF24J40MC module is compatible with
Microchip’s ZigBee ? , and MiWi? Development
Environment software stacks. The MiWi Development
Environment software stack including the source code
is available as a free download, from the Microchip web
site: http://www.microchip.com/wireless .
The MRF24J40MC module has received regulatory
approvals for modular devices in the United States
(FCC) and Canada (IC). Modular approval removes the
need for expensive RF and antenna design, and allows
the end user to place the MRF24J40MC module inside
a finished product and does not require regulatory
testing for an intentional radiator (RF transmitter). To
maintain conformance, refer to module settings in
Section 3.1.1 “MRF24J40MC Settings” for the
United States and Section 3.2.1 “MRF24J40MC
Settings” for Canada.
Figure 1-1 shows a simplified block diagram of the
MRF24J40MC module. The module is based on the
Microchip Technology MRF24J40 IEEE 802.15.4?
2.4 GHz RF Transceiver IC. The module interfaces to
many popular Microchip PIC ? microcontrollers
through a 4-wire SPI interface, interrupt, wake, reset,
power and ground, as shown in Figure 1-2 . Table 1-1
provides the pin descriptions.
Serial communication and module configuration for the
MRF24J40MC module are documented in the
“MRF24J40 Data Sheet” (DS39776). Refer to the
datasheet for specific serial interface protocol and
register definitions.
Also, see Section 1.3 “Operation” for specific register
settings that are unique to the MRF24J40MC module.
FIGURE 1-1:
PIC18FXXXX BLOCK DIAGRAM
PIC18FXXXX IEEE Std. 802.15.4? Module
MRF24J40
Antenna
U.FL
PA
Physical
MAC
Interface
SPI
Digital
I/O
Connector
LNA
Power
Management
Power
20 MHz
Crystal
? 2011 Microchip Technology Inc.
Preliminary
DS75002A-page 5
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