Re: Erasing OTP's and EPROMS by heat?
- From: Mike Harrison <mike@xxxxxxxxxxxxxxx>
- Date: Mon, 18 Sep 2006 09:27:52 GMT
On Mon, 18 Sep 2006 15:09:33 +0800, Alan <me@xxxxxxxxxxxxxxxxxxxxxxxx> wrote:
On 17 Sep 2006 19:03:15 -0700, gpratt@xxxxxxxxxxxxxxxx wrote:
I once heard that if you heat up an EPROM in an oven to a sufficient
extent then the leakage of the cells increase to the point that the
stored charge is discharge and the EPROM is effectively erased. Would
this really work? The reason I need to know is that I just bought 1000
OTP microcontrollers for a very good price from China but every one of
them is already programmed with 00 to FF sequentially for the whole
EPROM space. If I can possible save them, then good but otherwise they
are just rubbish now and I have lost my money :-( The part number is
MC68HC705J1ACP.
If you're reading 00 to FF sequentially then it seems to me that you
are not actually reading the chip but just the "phantom" data which
corresponds to the bottom byte of the address!
Seems a strange pattern to be programmed into a device...
Is this maybe what they normally read when protection is enabled?
.
- Follow-Ups:
- Re: Erasing OTP's and EPROMS by heat?
- From: Dave (from the UK)
- Re: Erasing OTP's and EPROMS by heat?
- From: gpratt
- Re: Erasing OTP's and EPROMS by heat?
- From: Eeyore
- Re: Erasing OTP's and EPROMS by heat?
- References:
- Erasing OTP's and EPROMS by heat?
- From: gpratt
- Re: Erasing OTP's and EPROMS by heat?
- From: Alan
- Erasing OTP's and EPROMS by heat?
- Prev by Date: Re: Erasing OTP's and EPROMS by heat?
- Next by Date: Re: Erasing OTP's and EPROMS by heat?
- Previous by thread: Re: Erasing OTP's and EPROMS by heat?
- Next by thread: Re: Erasing OTP's and EPROMS by heat?
- Index(es):
Relevant Pages
|
|
