6331 accelerometers/fake nunchuks?/Kionix?/stuck bits

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6331 accelerometers/fake nunchuks?/Kionix?/stuck bits

Postby yardleydobon » May 2nd, 2012, 8:58 pm

I just posted an article about the results of my examination of three different nunchuks: one official, one knock-off, and one official looking but probably fake. The two fake nunchuks used an accelerometer with the markings 6331 over QS***, where the asterisks stand in for a three letter code. I've read that newer nunchuk might have Kionix accelerometers. Are the 6331 accelerometers Kionix? The accelerometer data I get from 6331 nunchuks have bits that are permanently fixed at zero or one. Both nunchuks have stuck bits in the exact same bit positions. Does anyone know why these bits are stuck?


6331 accelerometers/fake nunchuks?/Kionix?/stuck bits
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Re: 6331 accelerometers/fake nunchuks?/Kionix?/stuck bits

Postby dkedr » May 3rd, 2012, 1:15 am

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Re: 6331 accelerometers/fake nunchuks?/Kionix?/stuck bits

Postby semicolo » May 3rd, 2012, 6:22 am

Maybe the resolution of the circuit sampling data is too low and they padded the missing bits, screwing where to place them in the process.
Are the 3 LSBs very important for accuracy? 7 bits of resolution doesn't seem that bad.
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