Quectel L80 EVB Guia do Utilizador descarregar pdf (Página 21)

UMTS/HSPA

UC20 EVB User Guide

UC20_EVB_User_Guide Confidential / Released 20 / 25

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Figure 11: Main UART Port

Table 5: Pin Assignment-Main UART

These pins are RS232 voltage level.

Pin No.

Signal Name

I/O

Description

1

DCD

O

Data carrier detection

2

RXD

I

Receive data

3

TXD

O

Transmit data

4

DTR

I

Data terminal ready

5

GND

/

GND

6

NC

/

NC

7

RTS

I

Request to send

8

CTS

O

Clear to send

9

RI

O

Ring indicator

NOTE

Quectel

Confidential

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