Timeline for Is it okay to call a UART “RS-232” if it doesn’t respect voltage levels specified in the RS-232 standard?
Current License: CC BY-SA 4.0
11 events
| when toggle format | what | by | license | comment | |
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| S Jan 12 at 22:05 | vote | accept | pnatk | ||
| Jan 12 at 22:05 | vote | accept | pnatk | ||
| S Jan 12 at 22:05 | |||||
| Nov 23, 2023 at 20:29 | comment | added | periblepsis | @Justme Thanks for the correction. I should have checked before writing. Only excuse I have is that I got all my information from a book called "Technical Aspects of Data Communication" by John E. McNamara (both 2nd and 3rd/1988 editions.) And it appears he doesn't only discuss EIA-232-D there, but includes UART details as well, now that I pull the book from the shelf to look. I must have conflated things. Need to kick myself a few times for this. ;) | |
| Nov 23, 2023 at 19:15 | comment | added | Justme | @periblepsis The RS-232 standard specifically does not define the link layer. Not any version of the standard. Just like RS-485 or RS-422 or LVDS do not define anything else than logic levels, not how to send bits of data. | |
| S Nov 23, 2023 at 17:14 | history | suggested | user3840170 | CC BY-SA 4.0 |
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| Nov 23, 2023 at 16:19 | review | Suggested edits | |||
| S Nov 23, 2023 at 17:14 | |||||
| Nov 23, 2023 at 13:16 | answer | added | Justme | timeline score: 2 | |
| Nov 23, 2023 at 12:23 | answer | added | Neil_UK | timeline score: 3 | |
| Nov 23, 2023 at 12:21 | comment | added | Kartman | You correctly interpret what RS232 is but as you’ve noted there is confusion with RS232 supposedly meaning async/uart data. The module you refer to uses a logic level interface aka’TTL’. There’s a zillion other terms used incorrectly by vendors and it just proliferates. | |
| Nov 23, 2023 at 12:20 | comment | added | periblepsis | I'm not going to spend a lot of time reading. But RS-232 (version -D and later, for example) does specify both the physical layer and also the data link layer. These days, the physical layer is costly (it costs money to provide the voltages and noise immunity) but the async approach in the data link layer is still useful. So, the two different layers get often conflated together. Not sure what else to add. Just be wary, is all. | |
| Nov 23, 2023 at 12:09 | history | asked | pnatk | CC BY-SA 4.0 |