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cu ("call Unix") is a Unix utility for establishing a connection between two computer systems via a serial port to another computer system. When cu was originally created, connections to remote systems were most often done by phone, and cu was used in conjunction with UUCP utilities to transfer data via a modem.
SCPI commands to an instrument may either perform a set operation (e.g. switching a power supply on) or a query operation (e.g. reading a voltage). Queries are issued to an instrument by appending a question-mark to the end of a command. Some commands can be used for both setting and querying an instrument.
Management Data Input/Output (MDIO), also known as Serial Management Interface (SMI) or Media Independent Interface Management (MIIM), is a serial bus defined for the Ethernet family of IEEE 802.3 standards for the Media Independent Interface, or MII. The MII connects media access control (MAC) devices with Ethernet physical layer (PHY ...
The name may refer to ARPANET's Terminal Interface Processor (TIP), a variant of the IMP, used to connect serial terminals directly with ARPANET. tip is referred to in the Solaris documentation as the preferred terminal emulator to connect to a Sun workstation's serial port for maintenance purposes, for example, to configure the OpenPROM firmware.
While interfaces such as Ethernet, FireWire, and USB also send data as a serial stream, the term serial port usually denotes hardware compliant with RS-232 or a related standard, such as RS-485 or RS-422. Modern consumer personal computers (PCs) have largely replaced serial ports with higher-speed standards, primarily USB.
Sending data from sub to main may use the opposite clock edge as main to sub. Devices often require extra clock idle time before the first clock or after the last one, or between a command and its response. Some devices have two clocks, one to read data, and another to transmit it into the device. Many of the read clocks run from the chip ...
The first version of the MIPI DSI, version 1.0 was released in 2005. MIPI DSI v1.1 was released in 2007, and added features such as "Command Mode" for directly sending commands and data to display modules using the display controller. [1] DSI v1.2 was released in 2011, and extended the video packet length and expanded the command mode. [2]
The difference between them lies in how much data is read and written by the operating system and hardware. These together can be called device special files in contrast to named pipes, which are not connected to a device but are not ordinary files either. MS-DOS borrowed the concept of special files from Unix but renamed them devices. [1]