Deep Sleep; Figure 8: Current Measurement For A Wakeup Event From Deep Sleep; Table 3: Average Current Consumption In Slotted Mode Sleep - Sierra Wireless MC5720 Hardware Integration Manual

Table 3: Average current consumption in slotted mode sleep

Slot cycle
index
0
1
2
3
4
5
6
7

Deep sleep

The modem enters deep sleep mode after failing within 15 minutes to acquire
service on a CDMA channel. The modem exits deep sleep every three minutes to
attempt to acquire a CDMA channel. The figures for typical consumption in
Table 3 (page 27) are based on a complete absence of radio signal (no attempts to
register). If a viable channel is detected, the modem attempts to register. This
increases the power consumption for the duration of the attempt, bringing up the
average consumption.
Current consumption in deep sleep mode follows a pattern as shown in Figure 8.
Figure 8: Current measurement for a wakeup event from deep
sleep
There are small spikes at the SCI unit interval for the modem timing tasks. A
wakeup to check for coverage takes about 4.5 seconds, and requires about
150 mA.
Rev 1.2
A p r - 0 5
Cycle duration (seconds)
1.28
2.56
5.12
10.24
20.48
40.96
81.92
163.84
P r o p r i e t a r y a n d c o n f i d e n t i a l
P o we r I n t e r f a c e
Average current
consumption (mA)
10.4
5.8
3.4
2.2
1.6
1.3
1.1
1.0
2 7