czietz wrote:Note that the values are wrong. From the 68060's errata sheet:S3- The nominal resistance and temperature coefficient of the internal die resistor connected
across the thermal sensing pins (THERM1, THERM0) as listed in the User's Manual (rev. 1)
on page 2-16 is incorrect. The correct value for the temperature coefficient is approximately
2.8 ohms/ degree C. The correct value for the nominal resistance is approximately 780
ohms at 25 degrees C.
Also, as willy notes, it says "approximately". Nowhere in the data sheet (or errata sheet) Motorola/Freescale/NXP commit to give actual minimum and maximum values for slope and resistance at 25°C. This means that they can be as inaccurate as they want! Uncalibrated, on-die sensor are usually fairly inaccurate, maybe in the range of +/-10°C, maybe even worse.
trecool wrote:I have this weird "bad tempreture values" message on cold boot.
I have send the board back at Willy and worked fine for him so I assume it has to do with the 060 cpu.
Can't be sure though since I have no spare 060 to try.
Anyone with the same experience?
troed wrote:Alright, thanks guys, I'll calibrate
786 Ohm is what I have at ambient desk temp (~23.5 degrees it seems) with the -004.
troed wrote:This difference was a lot larger than I expected.
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