Smart LTE Module Series
SC66 Hardware Design
SC66_Hardware_Design 32 / 139
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
UART6_CTS
246
DI
UART6 clear to
send
V
IL
max=0.63V
V
IH
min=1.17V
LPI_UART_2_
TXD
60
DO
LPI_UART_2
transmit data
V
OL
max=0.45V
V
OH
min=1.35V
Cannot be multiplexed
into general-purpose
GPIOs.
LPI_UART_2_
RXD
61
DI
LPI_UART_2
receive data
V
IL
max=0.63V
V
IH
min=1.17V
SD Card Interface
Pin Name
Pin
No.
I/O
Description
DC Characteristics Comment
SD_CLK
70
DO
High speed digital
clock signal of SD
card
1.8V SD card:
V
OL
max=0.45V
V
OH
min=1.4V
2.95V SD card:
V
OL
max=0.36V
V
OH
min=2.13V
SD_CMD
69
IO
Command signal of
SD card
1.8V SD card:
V
IL
max=0.58V
V
IH
min=1.27V
V
OL
max=0.45V
V
OH
min=1.4V
2.95V SD card:
V
IL
max=0.73V
V
IH
min=1.85V
V
OL
max=0.36V
V
OH
min=2.13V
SD_DATA0
68
IO
High speed
bidirectional digital
signal lines of SD
card
SD_DATA1
67
IO
SD_DATA2
66
IO
SD_DATA3
65
IO
SD_DET
64
DI
SD card insertion
detection
V
IL
max=0.63V
V
IH
min=1.17V
Active low.
SD_VDD
63
PO
Power supply for SD
card
Vnorm=2.95V
I
O
max=600mA
SD_PU_VDD
179
PO
1.8V/2.95V output
Vnorm=1.8V/2.95V
I
O
max=50mA
Power supply for SD
card’s pull-up circuit
only.
TP (Touch Panel) Interfaces
Pin Name
Pin N
I/O
Description
DC Characteristics Comment
