Where are the Technical Reference manuals located?
Hello Peter,
The Cortex-M4 Devices Generic User Guide includes a more accessible description of the ARMv7-M instruction set.
http://infocenter.arm.com/help/topic/com.arm.doc.dui0553a/DUI0553A_cortex_m4_dgug.pdf
Also, if you use the Search function at the top right of the community.arm.com pages, and search for "MCU resources", you'll find some additional documents which might be useful to you.
Best regards,
Graham.
The full specification of behaviour is the ARM Architecture Reference Manual.
The links are under the "ARM architecture" > "Reference Manuals" headings here: ARM Information Center
If you follow the links to the PDFs you'll have to register and accept a click-through-license to get the reference manuals themselves, but registering is free.
Cheers, Pete