Quectel BG950A-GL, Manual

Page: 22 / 91

LPWA Module Series
BG950A-GL&BG951A-GL_Hardware_Design 21 / 84
Require 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 = 0.54 V
V
IH
min = 1.26 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 = 0.36 V
V
OH
min = 1.44 V
1.8 V power
domain.
USIM_DATA 45 DIO (U)SIM card data
V
IL
min = -0.2 V
V
IL
max = 0.54 V
V
IH
min = 1.26 V
V
IH
max = 2.0 V
V
OL
max = 0.36 V
V
OH
min = 1.44 V
USIM_CLK 46 DO (U)SIM card clock
V
OL
max = 0.36 V
V
OH
min = 1.44 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 = 0.54 V
V
IH
min = 1.26 V
V
IH
max = 2.0 V
1.8 V power
domain.
If these pins are
unused, keep them
open.
MAIN_RXD 34 DI Main UART receive
MAIN_TXD 35 DO Main UART transmit
V
OL
max = 0.36 V
V
OH
min = 1.44 V
MAIN_CTS 36 DO
DTE clear to send signal
from DCE (Connect to
DTE’s RTS)
MAIN_RTS 37 DI
DTE request to send
signal from DCE
(Connect to DTE’s RTS)
V
IL
min = -0.2 V
V
IL
max = 0.54 V
V
IH
min = 1.26 V
V
IH
max = 2.0 V
MAIN_DCD 38 DO
Main UART data carrier
detect
V
OL
max = 0.36 V
V
OH
min = 1.44 V
MAIN_RI * 39 DO
Main UART ring
indication