LPWA Module Series
BG950A-GL&BG951A-GL_Hardware_Design
22 /89
differential
impedance of
90 Ω.
(-)
(U)SIM Interface
Pin Name
Pin No. I/O
Description
DC
Characteristics
Comment
USIM_DET
*
42
DI
(U)SIM card hot-plug
detect
V
IL
min = -0.2 V
V
IL
max = 0.57 V
V
IH
min = 1.19 V
V
IH
max = 2.0 V
1.8 V power
domain.
If unused, keep
this pin open.
USIM_VDD
43
PO
(U)SIM card power
supply
Vmax = 1.9 V
Vmin = 1.7 V
Only 1.8 V (U)SIM
card is supported.
USIM_RST
44
DO
(U)SIM card reset
V
OL
max = 0.38 V
V
OH
min = 1.36 V
1.8 V power
domain.
USIM_DATA
45
DIO
(U)SIM card data
V
IL
min = -0.2 V
V
IL
max = 0.57 V
V
IH
min = 1.19 V
V
IH
max = 2.0 V
V
OL
max = 0.38 V
V
OH
min = 1.36 V
USIM_CLK
46
DO
(U)SIM card clock
V
OL
max = 0.38 V
V
OH
min = 1.36 V
USIM_GND
47
Specified ground for
(U)SIM card
Main UART Interface
Pin Name
Pin No. I/O
Description
DC
Characteristics
Comment
MAIN_DTR
30
DI
Main UART data
terminal ready
V
IL
min = -0.2 V
V
IL
max = 0.57 V
V
IH
min = 1.19 V
V
IH
max = 2.0 V
1.8 V power
domain.
If unused, keep
this pin open.
MAIN_RXD
34
DI
Main UART receive
MAIN_TXD
35
DO
Main UART transmit
V
OL
max = 0.38 V
V
OH
min = 1.36 V
MAIN_CTS
36
DO
Main UART clear to
send
MAIN_RTS
37
DI
Main UART request
to send
V
IL
min = -0.2 V
V
IL
max = 0.57 V
V
IH
min = 1.19 V
V
IH
max = 2.0 V
MAIN_DCD
38
DO
Main UART data
carrier detect
V
OL
max = 0.38 V
V
OH
min = 1.36 V
MAIN_RI
*
39
DO
Main UART ring
indication
