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EVB User Guide

M80_EVB_UGD_V1.0 - 18 -

Table 10: Pins of UART port3

1-1 1-2 1-3

1-4

1-5

1-7 1-8

1-9

Figure 11: Main UART

Table 11: Pins of serial port

Pin

Signal

I/O

Description

Note

1_1

DCD

O

Data carrier detection

1_2

TXD

O

Transmit data

1_3

RXD

I

Receive data

1_4

DTR

I

Data terminal ready

1_5

GND

Ground

1_7

RTS

I

Request to send

1_8

CTS

O

Clear to send

1_9

RI

O

Ring indicator

Pin

Signal

I/O

Description

Note

1_1

TXD_AUX

O

Transmit data

1_2

RXD_AUX

I

Receive data

1_3

GND

Ground

Quectel

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Quectel Cellular Engine 1
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