Quectel EC25 series

state.
The followi
n
 Sendin
 When
E
3.5.1.4. US
B
If host doe
s
circuit to let
 Execut
 Ensur
e
 Discon
The followi
n
E
n
g figure sh
o
g data to E
C
E
C25has U
R
B
Applicati
o
s
not suppor
t
the modul
e
e AT comm
a
e
the DTR is
nect USB_
V
n
g figure sh
o
E
C25-A_U
s
o
ws the con
USB_
V
US
B
US
B
AP_R
E
Module
G
F
C
25through
R
C to repor
t
o
n without
t
USB susp
e
e
enter into
s
a
nd
A
T+QS
C
held in hig
h
V
BUS.
o
ws the con
US
B
U
U
A
P
Mod
u
Figure 6:
S
s
e
r
_Manual
C
nection bet
w
V
BU
S
B
_DP
B
_DM
E
AD
Y
G
ND
RI
F
igure 5: Sl
USB will w
a
t
, RI signal
w
USB Susp
e
e
nd functio
n
s
leep mode.
C
LK=1 to e
h
level or ke
e
nection bet
w
B
_VBUS
U
SB_DP
U
SB_DM
P
_READY
u
le
RI
GND
S
leep Appli
c
C
onfidenti
a
w
een the m
o
eep
A
pplic
a
a
ke up the
m
w
ill wake up
e
nd Functi
o
n
, you shoul
d
nable the sl
e
e
p it open.
w
een the m
o
Power
Switch
c
ation with
o
a
l / Release
o
dule and t
h
VD
D
US
B
US
B
GPI
O
GN
D
EIN
T
a
tion with
R
m
odule.
the host.
o
n
d
disconnec
t
e
ep mode.
o
dule and t
h
VDD
USB_
D
USB_
D
GPIO
H
EINT
GPIO
GND
o
ut Suspe
n
d 24 /
6
h
e host.
D
B
_DP
B
_DM
O
Host
D
T
R
I
t
USB_VBU
h
e host.
DP
D
M
H
ost
n
d Functio
n
L
EC25-AU
6
9
S with addi
t
n
L
TE Modul
e
ser Manu
a
t
ional contr
o
e
a
l
o
l