Hi,

It could be that the sensor is suffering the die=20
revision B7 EEPROM corruption issue.

Search for B7 on <www.1wire.org> and you will find=20
how to identify a possible bad B7 chip.

Are other chips also showing this error in Your=20
circuit?=20

Regards / Ruben


>=20
>     Hello guys,
>=20
>     i'm trying to read a dallas one wire thermometer....and i'm not sur=
e=20
> if i'm doing something wrong or the sensor is broken.
>=20
>     I'd like to know if the sensor is broken because when connecting it=
=20
> to a proto board i  inverted vcc and gnd pins for about 5 seconds, and=20
> the ic got hot.
>=20
>     Well, from the datasheet i saw that the default read value before=20
> starting a temp conversion is 85 degrees celcius. But i always get 40=20
> degres.
>=20
>     When operating....my sensor shows 103 degrees....and variates if i=20
> increase or decrease the temperature.
>=20
>     I also can read TL and TL which are read as 70 and 75....is it ok?
>=20
>     Finally, my sensor is a DS18B20. Makes any difference?
>=20
>     Thanks for the attention.
>=20
> []s Rafael.
>=20
>   =20
>   =20
> _______________________________________________
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>=20
>=20

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D
Ruben J=F6nsson
AB Liros Electronic
Box 9124, 200 39 Malm=F6, Sweden
TEL INT +46 40142078
FAX INT +46 40947388
ruben@pp.sbbs.se
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
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