Smart LTE Module Series
SC650T Hardware Design
SC650T_Hardware_Design 29 / 131
2.95V SD card
：
V
OL
max=0.37V
V
OH
min=2.2V
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=1.84V
V
OL
max=0.37V
V
OH
min=2.2V
SD_DATA0
68
IO
High speed
bidirectional digital
signal lines 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=1.84V
V
OL
max=0.37V
V
OH
min=2.2V
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_LDO11
63
PO
Power supply for SD
card
Vnorm=2.95V
I
O
max=800mA
SD_LDO12
179
PO
1.8V/2.95V output
Vnorm=1.8V/2.95
V
I
O
max=50mA
Power supply for SD
card’s pull-up circuit.
TP (Touch Panel) Interfaces
Pin Name
Pin No.
I/O
Description
DC
Characteristics
Comment
TP0_RST
138
DO
Reset signal of
touch panel (TP0)
V
OL
max=0.45V
V
OH
min=1.35V
1.8V power domain.
Active low.
TP0_INT
139
DI
Interrupt signal of
touch panel (TP0)
V
IL
max=0.63V
V
IH
min=1.17V
1.8V power domain.
TP0_I2C_
SCL
140
OD
I2C clock signal of
touch panel (TP0)
1.8V power domain.
