Hi,
I am designing a power supply for the above DSP. I have got several questions.
From my understanding the powering up sequence is: CVDD -> DVDD1.8 -> DVDD3.3
1. If individual regulators are used for each of these rails can the sequencing be done by an external controller. ie enable CVDD wait 1ms enable DVDD1.8 etc?
2. To save power can static core logic supplies (RVDD etc), DVDD1.8 and DVDD3.3 be switched off when not in use? i.e. Keep CVDD with the core is in sleep mode. This way the state is held.
3. On wake-up RVDDs and DVDD's are brought up in sequence? Is this ok?
4. By switching off Static core logic supplies and DVDD's would there be a significant power reduction?
5. Is it ok to use MOSFET switches to gate the power supplies?
Look forward to your answers.
BR
Manjula