Descriptions Of Uart2 Interface; Sim Card Interface; Figure 4-6 Uart2 Dce－Dte Connection Relationship Diagram; Table 4-4 Uart2 Interface Definitions - Zte MG2639_V3 User Manual

4.2.2

Descriptions of UART2 interface

Figure 4-6 UART2 DCE－DTE connection relationship diagram
See the definitions of UART2 interface in table 4-4.
Classification No.
43
UART
44
4.3 SIM card interf ace
MG2639_V3 module supports 1.8V or 3.0V SIM card. Refer to figure 4-7 for design.
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Table 4-4 UART2 interface definitions

Definitions I/O
RXD2 Input
TXD2 Output
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Descriptions
Receiving data
Transmitting data
User Manual
Remarks
DTE transmits serial data
DTE receives serial data
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