The formal standard that later became mainstream was EIA 232 C, where EIA is the standard institute and C is revision. This one is sloppily referred to as RS-232-C, since RS-232 is such a well-known name.
In RS232 serial communication as pictured below how does one ensure the bit stream is always read at the start/stop bits? I’m looking at this waveform and considering a case where two consecutive
From the info doc for PCB 1, the RS232 lines are a serial debug port with a bit rate of 250 kbps with voltage levels accurate to EIA/TIA-232 and an optional mounting variant to 3V3-TTL.
From the parts (complementary BJT transistors and discretes near the connector) I think it's a non-standard RS-232 port that idles at 0V rather than -9 or whatever.
wikipedia says that the RS-232-C (1969) specification fails to define many things, including character encoding, start and stop bits, and even the order of the bits. One of the things defined is that enormous 25 pin D connector. Later standards like 485 define more stuff, but whether they define the stop bits is another matter.
The between-signals twist would worsen crosstalk for RS-232, but again, it's highly unlikely this would be a problem. There will also be a modest reduction in capacitance between power and data pairs, which RS-232 may benefit from.
I want to control a hardware device which is controlled by its RS232 interface and it has female DB9(DE-9) port for serial communication. Normally the hardware device is controlled via a PC's seria...
RS-232 is a very simple serial protocol that was originally used for modems and teletypes. It is what is commonly called a serial port (or a COM port in MS-Windows).