MRF24J40-I/ML Microchip Technology, MRF24J40-I/ML Datasheet - Page 118

• 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

3.14
The MRF24J40 provides a battery monitor feature to
monitor the system supplied voltage. A threshold volt-
age level (BATTH) can be set and the system supplied
voltage can be monitored by the Battery Low Indicator
(BATIND) to determine if the voltage is above or below
the threshold. The following steps set the threshold and
enable battery monitoring:
TABLE 3-18:
DS39776C-page 118
MRF24J40
0x205 RFCON5
0x206 RFCON6
Addr.
0x30
Battery Monitor
RXSR
Name
REGISTERS ASSOCIATED WITH POWER MANAGEMENT
BATTH3
TXFIL
Bit 7
r
UPSECERR
BATTH2
Bit 6
r
BATTH1
BATIND
Bit 5
Preliminary
r
20MRECVR BATEN
BATTH0
Bit 4
1.
2.
3.
r
Set the battery monitor threshold (BATTH)
voltage in the RFCON5 (0x205<7:4>) register.
Enable battery monitoring by setting BATEN = 1
in the RFCON6 (0x206<3>) register.
Periodically, monitor the Battery Low Indicator
(BATIND) bit in the RXSR (0x30<5>) register to
determine if the system supply voltage is above
or below the battery monitor threshold (BATTH).
Bit 3
r
r
SECDECERR
Bit 2
© 2010 Microchip Technology Inc.
r
r
Bit 1
r
r
r
Bit 0
r
r
r