topic Re: MC9S12 MEMORY QUESTION in S12 / MagniV Microcontrollers

MC9S12 MEMORY QUESTION

P0zburn — Sat, 26 Jul 2025 19:32:16 GMT

I’m working with firmware designed for the MC9S12GC16CPBE and encountered usage of address 0x0F1C in control logic. I noticed this address isn’t documented in the datasheet or reference manual. Can anybody clarify if this is tied to the mask set 1M34C, or if there’s supplemental documentation available detailing special diagnostic or status registers for this variant?
THANKS

Re: MC9S12 MEMORY QUESTION

lama — Tue, 29 Jul 2025 06:13:27 GMT

Hi,

the memory map says...

After reset the map is:
0x0000–0x03FF: Register Space ...... 1K Register Space mappable to any 2K Boundary
0x0C00–0x0FFF: 1K RAM ...... 1K Bytes RAM Space mappable to any 2K Boundary

So, your address is defined as RAM after reset by default.

Best regards,

Ladislav