Product Info

LPWA Module Series
BC66-NA Hardware Design
BC66-NA_Hardware_Design 23 / 59
Connected
CPU
Active
Idle
CPU
Light Sleep
PSM
CPU
Deep Sleep
Software control
1. RTC event
2. PSM_EINT
Software
control
Only 32KHz RTC is
act ive
Figure 3: Module Operating Modes
3.5. Power Saving Mode (PSM)
Based on system performance, the module consumes an ultra-low current (typically 3.5μA power
consumption) in PSM. PSM is designed to reduce power consumption of the module and improve battery
life. The following figure shows the power consumption of the module in different modes.
Idle
In idle mode, the module is in “Light Sleep” status and network
connection is maintained in DRX/eDRX state; paging messages can be
received. Transitions to connected mode or PSM can be initiated in idle
mode.
PSM
In PSM, the module is in “Deep Sleep” status and only the 32kHz RTC
is working. CPU is powered off; the network is disconnected and thus
cannot receive downlink data. Transitions to connected mode can be
initiated in PSM.