P8X32A-M44 – The Longhorn Engineer https://longhornengineer.com Robotics, Pinball, Hacking, Portables Tue, 20 Dec 2022 20:01:25 +0000 en-US hourly 1 Appnote: Parallax Propeller layout. Dual SMD footprint. https://longhornengineer.com/2014/01/01/appnote-parallax-propeller-layout-dual-smd-footprint/ Thu, 02 Jan 2014 01:46:26 +0000 https://longhornengineer.com/?p=1969 Continue reading Appnote: Parallax Propeller layout. Dual SMD footprint. →]]> The Parallax Propeller MCU runs in 3 different flavors. A DIP-40 package (P8X32A-D40), a LQFP-44 package (P8X32A-Q44), and a QFN-44 package (P8X32A-M44). This appnote covers the two SMD packages; LQFP-44 and QFN-44.

The schematic is fairly simple as its just to show a typical layout of for the Propeller. The part number for the crystal is a 6MHz which will run the Propeller at 96MHz. It is a common HC-49/US package so the standard 5MHz type crystal can be used with this layout.

I made a special footprint that can use both the P8X32A-Q44 and P8X32A-M44. This way a part shortage on either package won’t hurt production. I made sure to leave plenty of room around the chip and supporting circuitry for easy fanout of the I/O. Just make sure to route away from the X0 and X1 crystal I/O to reduce EMF.

Files can be found on the GitHub repository and the footprint itself can be found in the my Eagle Library.

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