MRF24XA_15 Datasheet, PDF (238/258 Pages) Microchip Technology – Low-Power, 2.4 GHz ISM-Band IEEE 802.15.4™ RF

MRF24XA
The enhanced MAC and PHY feature set also
compresses the frame header time to achieve the
shortest possible radio ON time.
To reduce leakage current, ensure that GPIO weak pull
up is turned off in case it is not needed in Deep Sleep
mode.
EQUATION 10-1: BATTERY SELF-DISCHARGE
The discharge caused by 1 µA average current over one year: 1µA x 1 year = 8.76 mAh
TABLE 10-1: POLLING FOR PENDING DATA – NO PENDING DATA IS AVAILABLE⁽¹⁾
Wake-up
Consumed Battery Charge
Unit
Mode
Period
2 Mbps Extended Data 802.15.4 Compliant
Rate
Mode
Single wake-up
per wake-up
4480
17450
mA*µs = nC
Yearly average
1s
39.3
while waking up
20s
2
regularly in every
1 min
0.7
152.9
7.6
2.5
mAh/year = µA
mAh/year = µA
mAh/year = µA
5 min
0.1
0.5
mAh/year = µA
Note 1: The calculations are strongly depended on the used protocol. It may happen that a given protocol cannot
produce the listed battery life values.
TABLE 10-2: POLLING FOR PENDING DATA – 80 OCTETS OF PENDING DATA RECEIVED⁽¹⁾
Wake-up
Consumed Battery Charge
Mode
Period
2 Mbps Extended Data 802.15.4 Compliant
Unit
Rate
Mode
Single wake-up
per wake-up
12030
62620
mA*us = nC
Yearly average
while waking up
regularly in every
1s
20s
1 min
163.7
8.2
2.7
936.7
46.8
15.6
mAh/year = µA
mAh/year = µA
mAh/year = µA
5 min
0.5
3.1
mAh/year = µA
Note 1: The calculations are strongly depended on the used protocol. It may happen that a given protocol cannot
produce the listed battery life values.
TABLE 10-3: POLLING FOR PENDING DATA – TRANSMITTING 80 OCTETS TO COORDINATOR
(AS PIGGYBACK DATA – NO PENDING RECEIVED DATA)⁽¹⁾
Wake-up
Consumed Battery Charge
Mode
Period
2 Mbps Extended Data 802.15.4 Compliant
Unit
Rate
Mode
Single wake-up
per wake-up
10560
66090
mA*us = nC
Yearly average
1s
92.5
while waking up
20s
4.6
regularly in every
1 min
1.5
579
mAh/year = µA
28.9
mAh/year = µA
9.6
mAh/year = µA
5 min
0.3
1.9
mAh/year = µA
Note 1: The calculations are strongly depended on the used protocol. It may happen that a given protocol cannot
produce the listed battery life values.
DS70005023C-page 238
Preliminary
 2015 Microchip Technology Inc.