If I write a byte to 9-pin serial port will it go through pin 3 serially bit-by-bit or the complete byte will be written together on the different pins? How? Will the value written will sustain there if not overwritten?
Yes.
No.
No, because of the serial bit-wise asynchronous transmission. Depending on your serial configuration (mostly 1 startbit, 8 data bits,
1 stopbit) the bits run out in this way, so the last bit ist the stop bit.For example, see
Regards,
-- Bernhard Roessmann Don't Fear The Penguins!
it will be trnsfered serily bit-by-bit
No the value will only be written once and will terminate after the stop bit/s
Craig
In a normal situation, it will go thru 3 or 2 serially. I'm not sure who invented it, but the laplink or pc anywhere or someone started using multiple wires in the serial bundle to transmit data at faster rates than was possible with a normal serial link. If you have control of both ends, you can do some non-standard things with a standard serial port. mike
-- Bunch of stuff For Sale and Wanted at the link below. 21' RV, 400cc Dirt Bike Police Scanner, LCD overhead projector Tek 2465, ham radio, 30pS pulser Tektronix Concept Books, spot welding head... http://www.geocities.com/SiliconValley/Monitor/4710/
It will go through on pins 1-8, with pin 9 left over as a spare. That's why its a 9 pin connector. Don't send more than one byte a second because otherwise it will overheat the connector pins and they'll melt together. The value will sustain there until overwritten but will evaporate within a few hours if left alone.
Go get you a book on serial ports if you don't believe me.
Unless you're doing 9-bit serial, like the Intel 8051. Then all 9 pins are used.
--
Grant Edwards grante Yow! .. Should I get
at locked in the PRINCIPAL'S
visi.com OFFICE today -- or have
a VASECTOMY??
why
I thought bit 9 was used for parity...
ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.