Product Info

NB-IoT Module Series
BC660K-GL Hardware Design
BC660K-GL_Hardware_Design
3-18
/ 59
Debug UART Port
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
DBG_RXD
38
DI
Debug UART
receive
V
IL
max = 0.2 × VDD_EXT
V
IH
min = 0.7 × VDD_EXT
VDD_EXT
power domain.
DBG_TXD
39
DO
Debug UART
transmit
V
OL
max = 0.15
×
VDD_EXT
V
OH
min = 0.8
×
VDD_EXT
Ringing Signal*
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
RI
20
DO
Ring indication
V
OL
max = 0.15
×
VDD_EXT
V
OH
min = 0.8
×
VDD_EXT
VDD_EXT
power domain.
(U)SIM Interface
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
(U)SIM_VDD
14
DO
(U)SIM card
power supply
Vnorm = 1.8/3.0 V
(U)SIM_RST
12
DO
(U)SIM card
reset
V
OL
max = 0.15 × (U)SIM_VDD
V
OH
min = 0.8 × (U)SIM_VDD
(U)SIM_DAT
A
11
IO
(U)SIM card
data
V
IL
max = 0.2 × (U)SIM_VDD
V
IH
min = 0.7 × (U)SIM_VDD
V
OL
max = 0.15 × (U)SIM_VDD
V
OH
min = 0.8 ×(U)SIM_VDD
(U)SIM_CLK
13
DO
(U)SIM card
clock
V
OL
max = 0.15 × (U)SIM_VDD
V
OH
min = 0.8 × (U)SIM_VDD
(U)SIM_GND
10
Specified
ground for
(U)SIM card
Antenna Interface
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
ANT_RF
35
IO
RF antenna
interface
50 Ω
characteristic
impedance
GPIO Interfaces
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
GPIO1
3
IO
General-purpose
input/output
V
IL
max = 0.2
×
VDD_EXT
V
IH
min = 0.7
×
VDD_EXT
V
OL
max = 0.15
×
VDD_EXT
V
OH
min = 0.8 × VDD_EXT
VDD_EXT
power domain.
GPIO2
4
IO
General-purpose
input/output