User's Manual

LTE Module
EC20 Hardware Design
EC20_Hardware_Design Confidential / Released 19 / 83
USIM card.
Vmax=1.9V
Vmin=1.7V
For 3.0V USIM:
Vmax=3.05V
Vmin=2.7V
I
O
max=50mA
supported by the
module automatically.
USIM_DATA
15
IO
Data signal of USIM
card.
For 1.8V USIM:
V
IL
max=0.6V
V
IH
min=1.2V
V
OL
max=0.45V
V
OH
min=1.35V
For 3.0V USIM:
V
IL
max=1.0V
V
IH
min=1.95V
V
OL
max=0.45V
V
OH
min=2.55V
USIM_CLK
16
DO
Clock signal of USIM
card.
For 1.8V USIM:
V
OL
max=0.45V
V
OH
min=1.35V
For 3.0V USIM:
V
OL
max=0.45V
V
OH
min=2.55V
USIM_RST
17
DO
Reset signal of
USIM card.
For 1.8V USIM:
V
OL
max=0.45V
V
OH
min=1.35V
For 3.0V USIM:
V
OL
max=0.45V
V
OH
min=2.55V
USIM_PRE
SENCE
13
DI
USIM card insertion
detection.
V
IL
min=-0.3V
V
IL
max=0.6V
V
IH
min=1.2V
V
IH
max=2.0V
1.8V power domain.
If unused, keep it
open.
UART Interface
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
RI
62
DO
Ring indicator
V
OL
max=0.45V
V
OH
min=1.35V
1.8V power domain.
If unused, keep it
open.