Could I use Cortex-A for embedded applications?

Yep it does sound like a lot of timers and I guess external clocks too. So it really depends on how much they each have to do and how quickly, but also you'll have storage requirements for all the routines and their data. Are you hoping to use the controller as a low level sequencer for most operations rather than get signals back as each job is done? That's a common sort of job for Cortex M microprocessors but a Cortex A series gives you extra speed and size.

Yep it does sound like a lot of timers and I guess external clocks too. So it really depends on how much they each have to do and how quickly, but also you'll have storage requirements for all the routines and their data. Are you hoping to use the controller as a low level sequencer for most operations rather than get signals back as each job is done? That's a common sort of job for Cortex M microprocessors but a Cortex A series gives you extra speed and size.