NB-IoT Module Series
BC66 Hardware Design
BC66_Hardware_Design 16 / 57
Power Key Interface
Pin Name
Pin No.
I/O Description
DC Characteristics
Comment
PWRKEY
7
DI
Pull down
PWRKEY to turn
on the module
V
IL
max=0.3*VBAT
V
IH
min=0.7*VBAT
Reset Interface
Pin Name
Pin No.
I/O Description
DC Characteristics
Comment
RESET
15
DI
Reset the module
Active low.
PSM_EINT Interface
Pin Name
Pin No.
I/O Description
DC Characteristics
Comment
PSM_EINT
19
DI
Dedicated
external interrupt
pin.
Used to wake up
the module from
PSM.
Network Status Indication
Pin Name
Pin No.
I/O Description
DC Characteristics
Comment
NETLIGHT*
16
DO
Network status
indication
ADC Interface
Pin Name
Pin No.
I/O Description
DC Characteristics
Comment
ADC0*
9
AI
General purpose
analog to digital
converter
interface
Voltage range:
0V~1.4V
Main UART Port
Pin Name
Pin No.
I/O Description
DC Characteristics
Comment
RXD
18
DI
Receive data
1.8V power domain.
TXD
17
DO
Transmit data
Auxiliary UART Port
