NB-IoT Module Series
BC66&BC660K-GL Compatible Design
BC66&BC660K-GL
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Compatible_Design 13 / 30
10
SIM_GND
Dedicated ground
for USIM card
USIM_GND
Dedicated Ground for
USIM card
11
SIM_DATA
DIO
USIM card data
USIM_DATA
DIO
USIM card data
12
SIM_RST
DO
USIM card reset
USIM_RST
DO
USIM card reset
13
SIM_CLK
DO
USIM card clock
USIM_CLK
DO
USIM card clock
14
SIM_VDD
PO
USIM card power
supply
USIM_VDD
PO
USIM card power supply
15
RESET
DI
Reset the module
RESET_N
DI
Reset the module
16
NETLIGHT
DO
Indicate the
module's network
activity status
NETLIGHT*
DO
Indicate the module's
network activity status
17
TXD
DO
Main UART transmit MAIN_TXD
DO
Main UART transmit
18
RXD
DI
Main UART receive
MAIN_RXD
DI
Main UART receive
19
PSM_EINT
DI
External interrupt
pin dedicated to
waking up the
module from Deep
Sleep mode.
PSM_EINT
DI
External interrupt pin
dedicated to waking up
the module from Deep
Sleep/Light Sleep mode.
20
RI
DO
Ring indication
RI
DO
Ring indication
24
VDD_EXT
PO
Provide 1.8 V
voltage for external
circuits.
No voltage output in
Deep Sleep mode.
VDD_EXT
PO
Provide 1.8/3.3 V
voltage for external
circuits.
No voltage output in
Deep Sleep/Light Sleep
mode.
28
RXD_AUX
DI
Auxiliary UART
receive
RESERVED
-
-
29
TXD_AUX
DO
Auxiliary UART
transmit
RESERVED
-
-
35
RF_ANT
DIO
Antenna interface
ANT_RF
DIO
Antenna interface
38
RXD_DBG
DI
Debug UART
receive
DBG_RXD
DI
Debug UART receive
39
TXD_DBG
DO
Debug UART
transmit
DBG_TXD
DO
Debug UART transmit
42
VBAT_BB
PI
Power supply for the
module
’s baseband
part
VBAT
PI
Power supply for the
module
