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  1. 问一下大家什么是USB转TTL? - 知乎

    Aug 15, 2020 · USB转TTL是一种 串口通信 转换器,它可以将USB接口转换为TTL串口通信接口。 TTL串口通信是一种常见的数字通信方式,常用于单片机、传感器等设备之间的数据传输。 通 …

  2. How does TTL serial work? - Electrical Engineering Stack Exchange

    Point of terminology: "TTL serial" is a severely over-broad term, " (point-to-point) asynchronous serial (at TTL levels)" seems to be what you're asking about. (Though that's still probably …

  3. 带你一分钟了解编码器基础知识 - 知乎

    此外,增量编码器的信号输出电平标准也是多样的,常见的有TTL、HTL、PNP和NPN等。 TTL和HTL是常见的电平标准,其中TTL为长线差分驱动,而HTL也称为推拉式或推挽式输出,适用 …

  4. 既然IP数据包有TTL跳数限制,那它是如何实现远距离(横跨大半个 …

    既然IP数据包有TTL跳数限制,那它是如何实现远距离(横跨大半个地球)通信的? 首先对问题进行补充解释一下:IP数据包有TTL跳数限制,跳数变为零时数据包就被丢弃。 那么问题来了, …

  5. digital logic - What is meant by TTL in this context? - Electrical ...

    Jun 22, 2023 · TTL requires that logic 1 input must be at least 2V, and TTL drivers are designed to guarantee that. That is far short of what this driver requires to register as logic 1.

  6. 当TTL等于1时经过的最大路由个数为0,当TTL等于255时,能经过 …

    因为每经过一个路由器路由器会将ttl减1后发给下一跳,当ttl等于0路由器会丢弃该IP包。 所以ttl等于1时,路由器收到该包,减1,为0丢弃。

  7. 路由器的电路板上如何找出ttl电平的RXD,TXD,VCC,GND的口?

    2月2日补充:有时候厂家的TTL线路有电阻接到SoC,但是电阻空着没有焊接,需要自己补上。 另外有些厂家的uboot串口没有输出信息,接上啥也没有。

  8. USART, UART, RS232, USB, SPI, I2C, TTL, etc. what are all of these …

    Aug 14, 2012 · TTL mean Transistor-Transistor-Logic and has its level for logical zero near 0V and for logical one near 5V. Often any 5V logic is called TTL, although most circuits nowadays …

  9. 域名解析中的 TTL 是什么? 它设置的时间长短对网站有什么影响?

    TTL是 递归DNS 缓存域名解析的时间,以秒为单位。 过期了递归DNS就会去找 权威DNS 重新查询。 ( 什么是TTL值? ) 如果你的域名解析改动较频繁,比如使用 动态IP 等,就应该把TTL …

  10. ttl - 10k Resistor Pull Up/Down Standard for 74 series chips ...

    Mar 10, 2018 · I've been having some issues lately with the usage of 10k ohm resistors as pull down resistors for 74ls series chips. Most people seem to choose 10k resistors as their default …