what is difference between Arm7 and Arm cortex-m series??

what is difference between Arm7 and Arm cortex-m series??
what is difference between Arm7 and Arm cortex-m series??

what is difference between Arm7 and Arm cortex-m series??
what is the difference between ARM cortex M3 and ARM cortex A9

I need information about difference in registers and RAM and pins, i want to write CAN code to ARM cortex A9 by taking the reference of ARM cortex M3 code, can anyone please share information to me ASAP...
what is the difference between ARM cortex M3 and ARM cortex A9

I need information about difference in registers and RAM and pins, i want to write CAN code to ARM cortex A9 by taking the reference of ARM cortex M3 code, can anyone please share information to me ASAP...
Cortex-A72 and Cortex-A5x series boards

Hi Experts, Is there any sample development boards available on Cortex-A72/5x series ? Regards, Techguyz