MRF24J40-I/ML Microchip Technology, MRF24J40-I/ML Datasheet - Page 99

• 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

3.8.1.2
Values of Beacon Order (BO) and Superframe Order
(SO)
Superframe Duration (SD).
Beacon Interval (BI) in terms of BO can be expressed as:
Similarly, Superframe Duration (SD) in terms of SO can
be expressed as:
where aBaseSuperframeduration = 960 symbols.
BO and SO can be configured by programming the BO
(0x10<7:4>) bits and SO (0x10<3:0>) bits in the ORDER
register. For beacon-enabled networks, the values of BO
and SO should be in the range, 0 ≤ SO ≤ BO ≤ 14. If the
values of BO and SO are equal, then the superframe
does not have any inactive portion. A Beacon Interval
can be as short as 15 ms or a long as 251 seconds based
on the values of BO and SO.
FIGURE 3-5:
© 2010 Microchip Technology Inc.
Wait for GTS Slot
Wait for GTS Slot
SD = aBaseSuperframeduration * 2
BI = aBaseSuperframeduration * 2
determine
Transmit Complete
(clear TXG1TRIG)
Transmit Error
BO and SO
Switch TXGTSxFIFO
the
GTSSWITCH = 1
if Transmit Error
or
GTSFIFO STATE DIAGRAM
TXGTS1FIFO
TXGTS2FIFO
Beacon
Interval
Transmit Complete
or
Transmit Error
(clear TXG2TRIG)
(BI)
BO
SO
and
Preliminary
Wait for GTS Slot
Wait for GTS Slot
3.8.1.3
If a device wants to transmit or receive during CFP, it
sends out a “GTS request” in the CAP to the PAN coor-
dinator. The PAN coordinator broadcasts the address
of the device number for that device in the beacon
frame if resources are available.
To
TXGTS1FIFO and TXGTS2FIFO. The TXGTS1FIFO
and TXGTS2FIFO are ping-pong FIFOs and can be
assigned to different GTS slots or to the same slots. If
both are assigned to the same slot, they take turns for
transmission within that slot. TXGTS1FIFO and
TXGTS2FIFO can be triggered ahead of their slot time,
but transmission from the FIFO will take place exactly
at the assigned slot time.
Refer to Section 3.12 “Transmission” for information
on how to transmit a data frame using the
TXGTSxFIFOs.
Hold and wait TXGTSxFIFO
Complete
Transmit
support
GTSSWITCH = 0
if Transmit Error
TXGTS1FIFO
TXGTS2FIFO
GTS
GTS
Transmit
Complete
operation,
MRF24J40
Transmit Error
(clear TXG1TRIG
and TXG2TRIG)
Transmit Error
(clear TXG1TRIG
and TXG2TRIG)
MRF24J40
until Next GTS
Hold and Wait
DS39776C-page 99
uses