MRF24J40-I/ML Microchip Technology, MRF24J40-I/ML Datasheet - Page 110

• Manufacturer Part Number: MRF24J40-I/ML
• Description: IC TXRX IEEE/ZIGBEE 2.4GHZ 40QFN
• Manufacturer: Microchip Technology

Specifications of MRF24J40-I/ML

• Package / Case: 40-QFN
• Frequency: 2.4GHz
• Data Rate - Maximum: 250kbps
• Modulation Or Protocol: 802.15.4
• Applications: ISM, ZigBee™
• Power - Output: 0dBm
• Sensitivity: -95dBm
• Voltage - Supply: 2.4 V ~ 3.6 V
• Current - Receiving: 18mA
• Current - Transmitting: 18mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Number Of Receivers: 1
• Number Of Transmitters: 1
• Wireless Frequency: 2.4 GHz
• Interface Type: 4 Wire SPI
• Noise Figure: 8 dB
• Output Power: + 0 dBm
• Operating Supply Voltage: 2.5 V, 3.3 V
• Maximum Operating Temperature: 85 C
• Mounting Style: SMD/SMT
• Maximum Supply Current: 22 mA
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Memory Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

beacon and MAC command frames are handled in four
beacon-Enabled mode. Configuring the MRF24J40 for
3.12
IEEE 802.15.4 Standard defines four frame types:
Acknowledgment, Data, Beacon and MAC Command
frame. The transmission of the Acknowledgment frame
is handled automatically in hardware by the MRF24J40
and is covered in Section 3.13 “Acknowledgement” .
Hardware management of the transmission of data,
transmit (TX) FIFOs.
Each TX FIFO has a specific purpose depending on if the
MRF24J40
beacon-enabled network operation is covered in
Section 3.8.1 “Beacon-Enabled Network” . Configuring
the MRF24J40 for nonbeacon-enabled network operation
is covered in Section 3.8.2 “Nonbeacon-Enabled
Network” .
The four TX FIFOs are:
TX Normal FIFO – Used for the transmission of data
and MAC command frames during the Contention
Access Phase (CAP) of the superframe if the device is
operating in Beacon-Enabled mode and for all
transmissions when the device is operating in
Nonbeacon-Enabled mode.
TX Beacon FIFO – Used for the transmission of the
beacon frames.
TX GTS1 FIFO and TX GTS2 FIFO – Used for the
transmission of data during the Contention Free Period
(CFP) of the superframe if the device is operating
in Beacon-Enabled mode. Refer to Section 3.8.1
“Beacon-Enabled Network” for more information
about guaranteed time slots in Beacon-Enabled mode.
DS39776C-page 110
MRF24J40
Transmission
is
configured
for
Beacon
or
Non-
Preliminary
Figure 3-10 summarizes the memory map for each of
the TX FIFOs. Each TX FIFO occupies 128 bytes of
memory and can hold one frame at a time.
Figure 3-11 shows the flow of data from the TX FIFO to
on air packet and summarizes the data, beacon and
MAC command frames.
FIGURE 3-10:
0x07F
0x0FF
0x17F
0x1FF
0x000
0x080
0x100
0x180
TX Beacon FIFO
TX Normal FIFO
Memory Space
TX GTS1 FIFO
TX GTS2 FIFO
Long Address
MEMORY MAP OF TX
FIFOS
© 2010 Microchip Technology Inc.
128 bytes
128 bytes
128 bytes
128 bytes