MRF24J40-I/ML Microchip Technology, MRF24J40-I/ML Datasheet - Page 117

• 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

3.13.2
The MRF24J40 features hardware automatic Acknowl-
edgment. It will automatically Acknowledge a frame if
the received frame has the Acknowledgment request
subfield in the frame control field set to ‘1’. This will
maintain the RX-TX timing requirements of the
IEEE 802.15.4 Specification.
Automatic Acknowledgment is enabled by clearing the
NOACKRSP (RXMCR 0x00<5>) bit = 0. To disable
automatic Acknowledgment, set the NOACKRSP
(RXMCR 0x00<5>) bit = 1.
The transmission of an Acknowledgment frame in a
nonbeacon-enabled network, or in the CFP, shall
commence aTurnaroundTime (12) symbols after the
reception of the data or MAC command frame. The
transmission of an Acknowledgment frame in the CAP
shall commence at a backoff slot boundary. In this
case, the transmission of an Acknowledgment frame
shall commence between aTurnaroundTime and
(aTurnaroundTime
symbols after the reception of the data or MAC
command frame.
The
aTurnaroundTime as a constant value of 12 symbol
periods. The aTurnaroundTime can be programmed
TABLE 3-17:
© 2010 Microchip Technology Inc.
Addr.
0x00 RXMCR
0x12 ACKTMOUT
0x1B TXNCON
0x1C TXG1CON
0x1D TXG2CON
0x21 TXPEND
0x24 TXSTAT
0x27 TXTIME
0x2E TXSTBL
IEEE
Name
ACKNOWLEDGMENT REQUEST –
RECIPIENT
802.15.4
REGISTERS ASSOCIATED WITH ACKNOWLEDGEMENT
TXG1RETRY1 TXG1RETRY0 TXG1SLOT2
TXG2RETRY1 TXG2RETRY0 TXG2SLOT2
TXNRETRY1
TURNTIME3
RFSTBL3
DRPACK
MLIFS5
Bit 7
r
r
+
aUnitBackoffPeriod)
Specification
TXNRETRY0
TURNTIME2
RFSTBL2
MAWD6
MLIFS4
Bit 6
r
r
NOACKRSP
TURNTIME1
RFSTBL1
CCAFAIL
MAWD5
MLIFS3
Bit 5
defines
r
Preliminary
TXG1SLOT1
TXG2SLOT1
TURNTIME0
TXG2FNT
RFSTBL0
MAWD4
FPSTAT
MLIFS2
Bit 4
r
by the TURNTIME (TXTIME 0x27<7:4>) and RFSTBL
(TXSTBL 0x2E<7:4>) bits where aTurnaroundTime =
TURNTIME + RFSTBL.
3.13.3
The status of the frame pending bit in the frame control
field of the received Acknowledgment frame is reflected
in the FPSTAT (TXNCON 0x1B<4>) bit.
3.13.4
The frame pending bit in the frame control field of an
Acknowledgment frame indicates that a device has
additional data to send to the recipient following the
current
Standard, Section 7.2.1.1.3 “Frame Pending Subfield”.
Acknowledgment of a data request MAC command – In
response to a data request MAC command, if the
MRF24J40 has additional (pending) data, it can set the
frame pending bit of the Acknowledgment frame by set-
ting DRPACK (ACKTMOUT 0x12<7>) = 1. This will
only set the frame pending bit for an Acknowledgment
of a data request MAC command.
TXG1SLOT0
TXG2SLOT0
PANCOORD
INDIRECT
TXG1FNT
MAWD3
MSIFS3
MLIFS1
Bit 3
transfer.
r
RECEPTION OF
ACKNOWLEDGMENT WITH FRAME
PENDING BIT
TRANSMISSION OF
ACKNOWLEDGMENT WITH FRAME
PENDING BIT
TXG1ACKREQ
TXG2ACKREQ
TXNACKREQ
TXG2STAT
COORD
MAWD2
Refer
MLIFS0
MSIFS2
Bit 2
r
MRF24J40
to
TXG1SECEN
TXG2SECEN
GTSSWITCH
TXNSECEN
TXG1STAT
IEEE
ERRPKT
MAWD1
MSIFS1
Bit 1
DS39776C-page 117
r
802.15.4-2003
TXG1TRIG
TXG2TRIG
TXNTRIG
TXNSTAT
MAWD0
MSIFS0
PROMI
FPACK
Bit 0
r