Callum Flint

MC9S12A64 Power Supply

Discussion created by Callum Flint on Feb 24, 2012
Latest reply on Mar 1, 2012 by Callum Flint

I'm having trouble making head or tail of the datasheets with regards to supplying power to an S12A64CPVE chip. I've used the 'proposed layout' for a Colpitts oscillator on an 112-LQFP part, but I'm unsure as to levels to be supplied to each supply pair and what's connected internally - either to the on-chip regulator or by metal inside the part. I'm wanting to supply with 5V, use 2 ATD pins, 2 PWM pins and not bother with the PLL or digital logic.

 

I've included 2 screenshots - hopefully they give enough detail. The board isn't complicated in the slightest - I just don't want to have a PCB made, discover it's wrong and potentially break a uC.

 

Thanks for any help

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