ATmega169 rev number

Can anyone help with Atmel ATmega169
rev numbers, I have two chips marked code
0339 and another 0352, is thisjust
week 39 and week 52 of 2003? How
can I tell what REV number are they?
They both behave different so they are
either REV B & REV C or REV C & REV D.
Anyone help?

Phil

Phil wrote:
> Can anyone help with Atmel ATmega169
> rev numbers, I have two chips marked code
> 0339 and another 0352, is thisjust
> week 39 and week 52 of 2003? 

Yes,

> How can I tell what REV number are they?
> They both behave different so they are
> either REV B & REV C or REV C & REV D.
> Anyone help?

You need to look under the device, and for Atmel IC's
and Rev ID is normally the last letter of one
of the lines.
-jg

> > How can I tell what REV number are they?
> > They both behave different so they are
> > either REV B & REV C or REV C & REV D.
> > Anyone help?
>
> You need to look under the device, and for Atmel IC's
> and Rev ID is normally the last letter of one
> of the lines.

Thanks, but still none the wiser as reverse markings are:
week 52 chip: 3H0106   35579D 1-A 3H0345
week 39 chip: 3G0822A 35579D 1-A 3G0339

The week 52 device takes an extra 100uA with
the LCD which is what the REV C device should do.

Phil

"Phil" <please@sendmejunkmail.com> wrote in message
news:c8uple$mji$1@hercules.btinternet.com...
> Can anyone help with Atmel ATmega169
> rev numbers, I have two chips marked code
> 0339 and another 0352, is thisjust
> week 39 and week 52 of 2003? How
> can I tell what REV number are they?
> They both behave different so they are
> either REV B & REV C or REV C & REV D.
> Anyone help?
>
> Phil

According to the datasheet, the top 4 bits of the device identification
register (accessible via jtag only), 0 = REVA ... 3 = REVD

Cheers,
Alf

> > Can anyone help with Atmel ATmega169
> > rev numbers, I have two chips marked code
> > 0339 and another 0352, is thisjust
> > week 39 and week 52 of 2003? How
> > can I tell what REV number are they?
> > They both behave different so they are
> > either REV B & REV C or REV C & REV D.
> > Anyone help?
> >
> According to the datasheet, the top 4 bits of the device identification
> register (accessible via jtag only), 0 = REVA ... 3 = REVD

Thanks for the info.

Phil