Specifications

76
Key Features of the MRF24J40MB
Operates on ISM Band 2.405 – 2.475
GHz freq.
Small size: 22.9 mm x 33.0 mm
Supports ZigBee®, MiWi and MiWi
P2p wireless protocols
Surface mountable
Integrated PCB antenna
Up to 4000 ft. Range
Operating voltage 2.4V – 3.6 V (3.3V
typical)
Low current consumption
Table 22 Features of MRF24J40MB
The MRF24J40MB module is compatible with Microchip‟s ® Microcontroller
Families (Pic16F, PIC18F, PIC24F/H, dsPIC33). It is compatible with
Microchip‟s® ZigBee software stacks, available free to download from
Microchip‟s® website.
The main block diagram for the MRF24J40MB module is shown in Figure 34
below. This diagram depicts the main connections between the different
components within the RF transceiver module. The arrow on the right show how
it will connect with the microcontroller through the SPI wires.
Figure 34 MRF24J40MB Block Diagram (Reprinted with permission from
MicroChip® )
The MRF24J40MB module interfaces to the microcontroller via a four-wire serial
slave SPI interface, as well as the interrupt, external wake-up trigger, reset,
power and ground signals. In the Figure 35 below, we can see that input/ output
from the microcontroller will connect with the SPI Chip Select (CS) input and