1. Use
th
PWRKE
2. Ensure
3.9. USIM
The USIM c
3.0V USIM
Table 9: Pin
Pin Name
USIM_VDD
USIM_DAT
USIM_CLK
USIM_RST
USIM_
PRESENC
USIM_GN
NOTES
E
VBAT
Modu
Status
RESE
he RESET_
EY pin failed
e that there is
M Card I
card interfac
cards are su
n Definition
Pin No.
D 14
TA 15
K 16
T 17
CE
13
D 10
EC25-A_Us
T
≥
T
le
s
RU
ET _N
Fig
N only whe
d.
s no large c
nterface
ce circuitrym
upported.
n of the USI
I/O
PO
IO
DO
DO
DI
ser_ManualC
V
Treset_min
R
UNNING
≤
gure 16: Tim
en turning
apacitance
meets ETSI
IM Interface
Description
Power supp
Data signal
Clock signa
Reset signa
USIM card i
Specified gr
Confidentia
V
IL
≤
0 .5V
RESETTING
Treset_max
ming of Res
off the mod
on the PWR
and IMT-20
e
n
ply for USIM
of USIM ca
al of USIM ca
al of USIM c
insertion det
round for US
al / Release
RUNNING
x
setting Mod
dule by the
RKEY and R
000 SIM inte
card.
rd.
ard.
ard.
tection.
SIM card.
d 32 / 6
V
IH
≥
1
dule
e command
RESET_N pin
erface requir
Comment
Either 1.8V
by the mod
L
EC25-AU
69
.3V
AT+QPOW
ns.
rements. Bo
V or 3.0V is
ule automat
LTE Module
ser Manua
WD
and the
oth 1.8V and
s supported
tically.
e
al
e
d
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