CPUID values

Discussion created by lpcware Employee on Jun 15, 2016
Latest reply on Jun 15, 2016 by lpcware
Content originally posted in LPCWare by ktownsend on Wed Feb 03 16:26:03 MST 2010
I've been trying to setup a way to determine which mcu is being used (to determine SRAM size, revision number, available pins etc.), and it's easy enough to get the Revision, Part Number, and Variant values from the CPUID register, but I haven't found any information in the datasheet or user manual to say what these values actually mean. For example, the LPC1343FBD48 (QFP48, 8KB SRAM) reports:

Part Number = 0xC23
Variant = 2

How could I determine if this was an LPC1342 (part number = ???), or whether it was a 33 pin QFN or 48 pin QFP chip (variant?), for example? I'd like to make a simple enumeration for the various values, but haven't found this information on NXP's website.