What is a 9 pin serial cable?
Many early PC designs used DB9 serial ports to communicate with other computers or hardware devices. This 9-pin layout become a de facto hardware standard that enabled device manufacturers to create products that worked on a wide range of computer platforms.
How many pins does a serial cable have?
Serial connectors. Serial communication devices make use of 9 or 25 pin D-type connectors for their cabled connections. They are commonly designated as DB-9 or DB-25 with the number used to differentiate between the pin counts.
Is DB9 the same as RS-232?
DB9, for example, is a 9 pin connector for a serial cable. You can see one here. RS-232, on the other hand, refers to the standard itself. RS-232 (sometimes called EIA-232) describes how systems can communicate between each other using a serial cable.
Can DB9 be used for a monitor?
Almost all modern monitors/displays are provided with dual or triple interfaces – a basic interface, typically VGA, and one, or more, of the newer types….CGA Monitor (DB9)
| DB9 Pin | Name | Function/Notes |
|---|---|---|
| 8 | HSYNC | Horizontal Sync. |
| 9 | VSYNC | Vertical Sync. |
What does a 9 pin RS232 cable do?
An RS232 pinout 9 pin cable features nine pins: 1. Data Carrier Detect – After a data terminal is detected, a signal is sent to the data set that is going to be transmitted to the terminal. 2.
What is the background of the 9 pin serial port?
The background of the 9 pin serial port First introduced in the 60s, RS-232 is a protocol that defines how the data is transferred, bit by bit from a Data Terminal Equipment (DTE) such as a computer terminal, to Data Communication Equipment (DCE) such as a modem. RS-232 is the common standard used in serial ports.
What do you need to know about RS-232 DB9?
RS-232 DB9 Pinout and Usage 1 RS-232 DB9 Overview. The RS232C DE-9, often mistakenly referred to as a DB-9 port used to be the industry standard for serial data transmission. 2 Standard RS232 data packet. A RS232 transmission begins with a start bit. 3 An example of how RS232 serial port works with the help of the serial mouse
How to pin out a serial RS-232 mouse?
An explanation of serial RS-232 mouse pinout When DTR link is toggled, the mouse should identify itself by sending one data byte containing the letter M (ASCII 77). For the mouse to work correctly, both RTS and DTR lines must be positive. Ensure the DTR-DSR and RTS-CTS lines are not shorted.