The main limitations that jumped out for me are that its max speed is 62 kHz (not MHz) and that it has only 64 bytes of ram! (And the B version, oddly, has 60. Anybody know what it uses the other four for, especially because it lacks a timer?)
Sadly It's OTP ![Banging Head |O](https://www.eevblog.com/forum/Smileys/default/bangheadonwall.gif.pagespeed.ce.8iLbFYV4Bc.gif)
The English datasheet, in §1.2, says:
IO space and memory space are independent
but the Chinese datasheet, as translated by Google Translate*, has the wording:
Independent IO address and storage address for program development
which, to me, on first reading, suggested that it could use an external (rewritable) program memory. However, after having read the English version, I can read the Chinese wording to mean the same thing, so I'm guessing it doesn't actually support external program memory.
![Sad :(](https://www.eevblog.com/forum/Smileys/default/xsad.gif.pagespeed.ic.L3FGyzQrjB.png)
*Just paste the PDF's URL into the Google Translate field and click Translate.
i mean i thought 1 Kilo Watt, cant they find another shortcut for Word? for eg 1KWd?
Expecting SI units, it would have been a Kelvin * Watt.
W is fairly common for "word" and given the context, there is little chance for misunderstanding - unless, of course, the reader doesn't know what a "word" is when talking about memory. And if you don't know that, adding another d wouldn't probably help too much.
If I wasn't expecting a quantity of "words", I'd read KWd as kelvin-watt-day, which Wolfram|Alpha tells me is equivalent to 86.4 kilojoule-kelvins. (It also claims this to be a measurement of something it calls "entransy", though neither Wikipedia nor Wiktionary knows what that means.)