Re: OTP Secure Digital ?

PeteS wrote:
larwe wrote:
On Jan 30, 5:20 pm, "Talal Itani" <tit...@xxxxxxxxxxx> wrote:

I am looking for SD (Secure Digital) memory that can be
programmed only once. Basically, once programmed, it cannot be
erased. I searched the web,

There is no such thing.

Mass-produced removable memories like this tend to use mask ROM.
If they resemble SD it's only cosmetically. Such devices have a
vested interest in NOT using a simple-to-duplicate storage format
where blank media are available off the shelf.

There are such things as OTP devices; we call them PROMs :)

Used to be lots of them. They contained fusible links which, once
blown, can't be unblown.

--
<http://www.cs.auckland.ac.nz/~pgut001/pubs/vista_cost.txt>

"A man who is right every time is not likely to do very much."
-- Francis Crick, co-discover of DNA
"There is nothing more amazing than stupidity in action."
-- Thomas Matthews


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