NB-IoT Module Series
BC66 Hardware Design
BC66_Hardware_Design 20 / 57
VBAT
VDD_EXT
RUNNING
OFF
Module
Status
PSM_EINT
4ms
Figure 4: Timing of Waking up Module from PSM
Among all GPIO interrupts, only the dedicated external interrupt pin PSM_EINT can successfully wake up
the module from PSM. The module cannot be woken up by any other general purpose GPIO interrupts.
3.6. Power Supply
3.6.1. Power Supply Pins
BC66 provides two VBAT pins for connection with an external power supply. The table below describes
the module's VBAT and ground pins.
Table 6: Power Supply Pins
Pin Name
Pin No.
Description
Min.
Typ.
Max.
Unit
VBAT_BB
42
Power supply for the
module
’s baseband
part
2.1
3.3
3.63
V
VBAT_RF
43
Power supply for the
module
’s RF part
2.1
3.3
3.63
V
GND
1, 27, 34,
36, 37, 40, 41
GND
NOTE
