MRF24J40-I/ML Microchip Technology, MRF24J40-I/ML Datasheet - Page 30

• 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

REGISTER 2-16:
DS39776C-page 30
MRF24J40
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 7
bit 6
bit 5
bit 4-3
bit 2-0
Note 1:
NOCSMA
R/W-0
Refer to IEEE 802.15.4™-2003 Standard, Table 71 – MAC PIB attributes.
NOCSMA: No Carrier Sense Multiple Access (CSMA) Algorithm bits
1 = Disable CSMA-CA algorithm when transmitting in Unslotted mode with GTSSWITCH
0 = Enable CSMA-CA algorithm when transmitting in Unslotted mode with GTSSWITCH
BATLIFEXT: Battery Life Extension Mode bit (macBattLifeExt)
1 = Enable
0 = Disable (default)
SLOTTED: Slotted CSMA-CA Mode bit
1 = Enable Slotted CSMA-CA mode
0 = Disable Slotted CSMA-CA mode (default)
MACMINBE<1:0>: MAC Minimum Backoff Exponent bits (macMinBE)
The minimum value of the backoff exponent in the CSMA-CA algorithm. Note that if this value is set to
‘0’, collision avoidance is disabled.
Default: 0x3.
CSMABF<2:0>: CSMA Backoff bits (macMaxCSMABackoff)
The maximum number of backoffs the CSMA-CA algorithm will attempt before declaring a channel
access failure.
111 = Undefined
110 = Undefined
101 = 5
100 = 4 (default)
011 = 3
010 = 2
001 = 1
000 = 0
BATLIFEXT
R/W-0
(TXPEND 0x21<1>) bit set
(TXPEND 0x21<1>) bit set (default)
TXMCR: CSMA-CA MODE CONTROL REGISTER (ADDRESS: 0x11)
W = Writable bit
‘1’ = Bit is set
(1)
SLOTTED
R/W-0
MACMINBE1
R/W-1
(1)
Preliminary
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
MACMINBE0
R/W-1
CSMABF2
R/W-1
© 2010 Microchip Technology Inc.
x = Bit is unknown
CSMABF1
R/W-0
CSMABF0
R/W-0
bit 0