Quote:
|
Originally Posted by IronStone @gizmo
no, in your mod V2 stands nothing about lifting pin4. As far as i understood is pin 4 the pin where the ATTP-1 gehts the anode-signal of the thermal diode ? When i lift this pin the ATTP gets no more signal from the diode or misunderstood i something ? |
Just checking.
I'm just looking over the datasheet for the MAX6657 now. In the block diagram, it indicates that DXP is fed from an internal constant current source. This is your problem, as the diode already has a bias current applied from the 3.3v reference voltage (VREF) developed by the ATTP-1. In order to make your circuit work you will need to disconnect this bias. Probably the easiest thing to do would be to lift pin 7 (the VREF source) of the Attansic chip. You will need to power your MAX6657 from the +5VSB if you do this, though, otherwise the ATTP-1 won't let you boot the computer. This should allow you to still have the ATTP-1 protecting your CPU while you read the temp from the MAX6657.