MC6812/MC9S12 naming scheme

[jgharston]

Does anybody know what the parts of the Freescale MC9S12 device names mean?
MC9S12A, MC9S12B, MC9S12C, MC9S12D128, MC9S12D256, MC9S12XD256, MC9S12E, MC9S12XE, etc.
The suffix number is a memory size, (tho' what memory size I can't work out, just that a '256 has more than a '128).
What's the difference between a -C, a -D, an -E, a -D and a -DX, an -E and an -XE, etc.
I've spent all morning trawling through online documents (while listening to a Dr Who docu on the radio), and it's brick wall after brick wall; I've managed to get as far as putting together <a href="https://mdfs.net/Docs/Comp/6812/MemoryMap">this</a>.
Thanks in advance.

 

[jgharston]

Ok, I've got this so far:

MC9S12[X][AAA][P][NNN][AAAA]
...|...|...|...|...|....+------ package, eg temperature, voltage, etc
...|...|...|...|...+----------- flash size in K in power of two, or in M *100
...|...+---|---|--------------- X=Contains XGATE mmu/dma
...+-------|---|--------------- CPU
...........|...+--------------- P=???
...........+------------------- NE ???
...............................  A ???
...............................  B ???
...............................  C ???
...............................  D ???
...............................  E ???