N58 Hardware User Guide
Chapter 5 Application Interfaces
Copyright © Neoway Technology Co., Ltd. All rights reserved.
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USB data cables must adopt differential trace design, and the differential impedance must be
limited to 90 Ω. The cable from the interface to the module pin must be isolated from other signal
cables and must be wrapped by ground cables.
5.3.2 UART
Pin Name
Pin No.
I/O
Function
Remarks
UART1_TXD 69
DO
Data sending
Software (standard) version: These
pins are used for data transmission.
Software (open) version: These pins
are used for data transmission.
Note: UART1_CTS (pin 71) can be
used to capture the CP-side logs of
the module.
UART1_RXD 70
DI
Data receiving
UART1_CTS 71
DI
User
allowing
the
module to send data
UART1_RTS 72
DO
Module requesting the
user to send data
UART2_TXD 46
DO
Data sending
Software (standard) version: These
pins are used for AT command
communications.
Software (open) version: These pins
are used for data transmission.
UART2_RXD 47
DI
Data receiving
UART2_CTS 51
DI
User
allowing
the
module to send data
UART2_RTS 52
DO
Module requesting the
user to send data
UART3_RXD 11
DI
Data receiving
These pins are used only for module
debugging.
UART3_TXD 12
DO
Data sending
The N58 module can provide three UART interfaces, and two of them support hardware flow control.
The UART interfaces support 921600 bps at most. The level at the interfaces is 1.8 V. The following
figure shows the reference design of UART connections.
