Product Info

Smart LTE Module Series
SC66 Hardware Design
SC66_Hardware_Design 33 / 118
pull-up to 1.8V.
If unused, keep
this pin open.
USIM2_RST
207
DO
(U)SIM2 card
reset signal
V
OL
max=0.4V
V
OH
min=
0.8 × USIM2_VDD
USIM2_CLK
208
DO
(U)SIM2 card
clock signal
V
OL
max=0.4V
V
OH
min=
0.8 × USIM2_VDD
USIM2_DATA
209
IO
(U)SIM2 card data
signal
V
IL
max=
0.2 × USIM2_VDD
V
IH
min=
0.7 × USIM2_VDD
V
OL
max=0.4V
V
OH
min=
0.8 × USIM2_VDD
USIM2_VDD
210
PO
(U)SIM2 card
power supply
Either 1.8V or
2.95V (U)SIM card
is supported.
UART Interfaces
Pin Name
Pin
o.
I/O
Description
DC Characteristics
Comment
DEBUG_TXD
5
DO
DEBUG transmit
data.
Debug port by
default.
V
OL
max=0.45V
V
OH
min=1.35V
1.8V power
domain.
If unused, keep
these pins open.
DEBUG_RXD
6
DI
DEBUG receive
data.
Debug port by
default.
V
IL
max=0.63V
V
IH
min=1.17V
UART1_TXD
7
DO
UART1 transmit
data
V
OL
max=0.45V
V
OH
min=1.35V
UART1_RXD
8
DI
UART1 receive
data
V
IL
max=0.63V
V
IH
min=1.17V
UART6_RXD
198
DI
UART6 receive
data
V
IL
max=0.63V
V
IH
min=1.17V
UART6_TXD
199
DO
UART6 transmit
data
V
OL
max=0.45V
V
OH
min=1.35V
UART6_RTS
245
DO
UART6 request to
send
V
OL
max=0.45V
V
OH
min=1.35V
UART6_CTS
246
DI
UART6 clear to
send
V
IL
max=0.63V
V
IH
min=1.17V