YUGE CLM920 NC3, Hardware Manual, Page: 37 / 80

CLM920_NC3_LTE Module hardware manual
Shanghai Yuge Information Technology co., LTD - 37 -
floating.
14
USIM_
VDD
PO
USIM
card
power
supply V3.0 2.75 3.0 3.05 USIM_VDD=
3.0V
V1.8 1.75 1.8 1.95
15
USIM_
DATA
IO
USIM
card
data
VIH 0.65*VDD 3.05 USIM_VDD=
1.8V
VIL -0.3 0 0.25*
VDD
VOH VDD-0.45 3.05
VOL 0 0 0.45
16
USIM_
CLK D
O
USIM
card
clock VOH VDD-0.45 3.05 USIM_VDD:3
.0V
/1.8V
VOL 0 0 0.45
17
USIM_
RST D
O
USIM
card
reset VOH VDD-0.45 3.05 USIM_VDD:3
.0V
/1.8V
VOL 0 0 0.45
3.7.1 USIM card reference circuit
The CLM920 NC3 module does not come with a USIM card slot. Users need to design a
USIM card slot on their own interface board.
USIM card interface reference circuit is as follows
：
Figure 3-16 USIM design circuit diagram