Data Sheet

THUNDERCOMM TurboX™ C40x SoM Datasheet
37
VREG_L6_1P8
+1.8
-
100
Y
1.8V IO pull up voltage;
VREG_L11_SDC2
+2.95
+1.8--+3.3
100
Y
Power output for SD card
data pull up
VREG_L7_1P8
+1.8
+1.7--+1.89
100
N
1.8V LDO power
output,100mA
VREG_L13_3P3
+1.8
+1.8--+1.8
100
N
1.8V LDO power
output,100mA
Table 4-3 Output power
4.4 Digital-logic characteristics
The digital I/O's performance depeds on its pad type, usage, and power supply voltage.
The SoM IO voltage level is the same with P3 except the SD card and analog input/output.
The I2C, USB,MIPI and UART comply with the satndards, and additional specifications are not required.
All other digital I/Os require performance specifications and are organized within this section.
4.4.1 Digital GPIO characteristics
The GPIO ports are digital I/Os that can be programmed for a variety of configurations. General performance
specifications for are the different configurations.
The followint table shows the digital GPIO characteristics:
Parameter
Description
Min
Max
Units
VIH
High-level input voltage, CMOS/Schmitt,
0.65* P3
-
V
VIL
Low-level input voltage, CMOS/Schmitt,
-
0.35* P3
V
VSHYS
Schmitt hysteresis voltage
100
-
mV
VOH
High-level output voltage, CMOS
P3-0.45
-
V
VOL
Low-level output voltage, CMOS
-
0.45
V
RPULL-UP
Pull-up and Pull-down resistance
55
390
KΩ
Rk
Keeper resistance
30
150
KΩ
Table 4-4 digital IO voltage performance
4.4.2 SD card digital I/O characteristics
The SD card is powered by P2 supply; the power is 1.8V and 2.95V.the following table shows the SD card