CPU mpc8315e hangs if I touch its top surface

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CPU mpc8315e hangs if I touch its top surface

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zhenhuan
Contributor I

what  is possible reason?

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alexander_yakov
NXP Employee
NXP Employee

The most probable reason - some input pin may be left unconnected and acts as antenna.

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alexander_yakov
NXP Employee
NXP Employee

The most probable reason - some input pin may be left unconnected and acts as antenna.

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zhenhuan
Contributor I

It turned out that  TEST_MODE pin (D6) was left unconnected, it shold be the reason.

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LPP
NXP Employee
NXP Employee

Also, it migh be a failed joint under the package that bounces under the pressure. You can distinguish between two reasons by touching the package by a plastic stick rather than by a finger.

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