my DS1621 return no ack

[coconico]

When I write the configuration, I send 0xEE and on the scope I can see only 0xCC. This is my first problem. My second problem is that when I read a temp, it return no ACK.

I send the following:

0x90
0xAA
0x91

And he respond:

0x90 ACK
0xAA ACK
0x91 NACK
temp1 NACK
temp2 NACK

The temperature is always 0°C

Can anyone help me???

[jds-pic]

[coconico]

it all right my I2C goes very good. I had a very bad shematic from a colleg and the resistors were in serial. But they must be in pull-up.

Thank you for your reply.

[rnielsen]

<cleans off a small spot on the computer monitor>
<firmly grips both sides of monitor>
<bangs head on spot, sharply, several times>

AAAAAHHHHHHHhhhhhh........

<--- feels much better now.

[dyeatman]

It is EXTREMELY frustratiing when they dont do what you tell them to do isn't it? I hope you didn't damage anything important like your head or the monitor! Just remember, don't try it with an LCD, that could be expensive!