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M80 EVB User Guide

M80_EVB_UGD_V1.2 - 27 -

Table 10: Pins of Auxiliary UART

Note: The above pins are RS232 voltage level.

Table 11: Pins of debug UART

Note: The above pins are RS232 voltage level.

The CMOS level of UART signal can be test through the test points below. Customer can use

these test points to verify the design between customer device and the module.

Figure 27: Test points of Auxiliary and Debug port

Signal

I/O

Description

Note

1_2

TXD_AUX

Transmit data

1_3

RXD_AUX

Receive data

1_5

GND

Ground

Signal

I/O

Description

Note

2_2

DBG_TXD

Transmit data

2_3

DBG_RXD

Receive data

2_5

GND

Ground

Quectel

Confidential

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Sim2 M80 Guida Utente Pagina 28