Data Terminal Ready (DTR) is a control signal in RS-232 serial communications, transmitted from data terminal equipment (DTE), such as a computer, to data communications equipment (DCE), for example a modem, to indicate that the terminal is ready for communications and the modem may initiate a communications channel.

Dec 8, 2023 · 在实际应用中，DTR 和 RTS 通常用于实现全双工通信，即在同一时刻，可以实现数据的发送和接收。 当 DTR 和 RTS 同时为高电平时，表示数据终端设备准备好发送数据，并请求串口设备开始接收数据。 此时，串口设备收到 RTS 信号后，会启动数据接收过程。 总之，DTR 和 RTS 是串口通信中用于控制数据传输的关键信号，它们分别表示数据终端设备的准备状态和传输请求。 通过这两个信号，可以实现数据终端设备与串口设备之间的协同工作，完成数据传输任 …

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Nov 11, 2020 · RTS/CTS, as name suggests, is a flow mechanism in which Data Terminal Equipment (DTE) i.e. host assets or send RTS to Data Communication Equipment (DCE). This is simply done to indicate that host is ready to send data and modem can initiate or form a communication channel.

To add a bit more detail, its a two level hierarchy so "officially" both must happen for communication to take place. The behavior is defined in the original CCITT (now ITU-T) standard V.28. The DCE is a modem connecting between the terminal and telephone network.

May 6, 2017 · Basically DTR is used to indicate the presence of some equipment, and RTS is one half of hardware flow control (along with CTS) to start and stop communication.

Hardware flow control uses the RTS/CTS (or DTR/DSR) signals to communicate. When connecting a serial device to a computer, connect the CTS pins to the RTS pins (for DTR/DSR flow control, DSR connects to DTR).

Nov 24, 2018 · 本文深入探讨了RTS/CTS和DTR/DSR在串口通信中的作用，解析了它们在流控制和链接建立中的区别与联系。 详细介绍了在全双工模式下，RTS/CTS如何协调数据发送与接收，以及DTR/DSR在建立通信链接时的应用。 同时，对比分析了不同物理连接方式对通信效率的影响。 摘要生成于 C知道 ，由 DeepSeek-R1 满血版支持， 前往体验 > 但是至今还是觉得，没有彻底明白，还有有一点点迷惑。 现在重新去整理相关知识。 What is the difference between …

This document describes the difference between DTR/DSR handshaking and RTS/CTS flow control in context of LM Technologies Serial Adapters – LM048, LM048SPA and LM058

Jan 4, 2024 · 串口通讯中的RTS（Request to Send）和DTR（Data Terminal Ready）是两个关键的控制信号，它们在保证串口正常通讯中扮演着至关重要的角色。 本文将深入探讨RTS和DTR的定义、作用和使用。 1. RTS是什么？ RTS是串口通信中的一种控制信号，用于告知接收端数据准备发送。 在传输数据之前，发送端会通过设置RTS信号来通知接收端准备接收数据。 RTS的作用在于确保数据在发送之前接收端已经准备好接收。 这样可以避免数据发送过程中的丢失或冲 …