5G Module Series
RG255C-GL_Mini_PCIe_Hardware_Design 44 / 57
6.2. Digital I/O Characteristic
The following table shows the I/O requirements of RG255C-GL Mini PCIe.
Table 23: I/O Requirements
Table 24: (U)SIM High/Low-voltage I/O Requirements (Unit: V)
1. The PCM
*
and I2C interfaces are 1.8 V power domain.
2. The maximum voltage value of V
IL
for PERST# and W_DISABLE# is 0.5 V.
6.3. ESD Protection
Static electricity occurs naturally and it may damage the module. Therefore, applying proper ESD
countermeasures and handling methods is imperative. For example, wear anti-static gloves during the
development, production, assembly and testing of the module; add ESD protection components to the
ESD sensitive interfaces and points in the product design.
Parameter
Description
Min.
Max.
Unit
V
IH
High-level input voltage
0.7 × VCC_3V3
V 0.3
V
V
IL
Low-level input voltage
-0.3
0.3 × VCC_3V3
V
V
OH
High-level output voltage VCC_3V3 - 0.5
VCC_3V3
V
V
OL
Low-level output voltage
0
0.4
V
Parameter
Description
Min.
Max.
V
IH
High-level input voltage
0.7 × USIM_VDD
US 0.3
V
IL
Low-level input voltage
-0.3
0.2 × USIM_VDD
V
OH
High-level output voltage
0.8 × USIM_VDD
-
V
OL
Low-level output voltage
-
0.4
NOTE
S
