Resetting The Processor; Recommendations For Unused Pins - Analog Devices ADSP-BF506F Hardware Reference Manual

Resetting the Processor

Consult your CAD software tools vendor. Some companies offer demon-
stration versions of signal integrity software. Simply by using their free
software, you can learn:
• Transmission lines are real
• Un-terminated printed circuit board traces will ring and have over-
shoot and undershoot
• Simple termination will control signal integrity problems
Resetting the Processor
The reset pin requires a monotonic rise and fall. Therefore the pin should
not be connected directly to an R/C time delay because such a circuit
could be noise sensitive. In addition to the hardware reset mode provided
via the RESET pin, the processor supports several software reset modes.
For detailed information on the various modes, see Blackfin Processor Pro-
gramming Reference. The processor state after reset is also described in the
programming reference.

Recommendations for Unused Pins

Most often, there is no need to terminate unused pins, but the handful
that do require termination are listed at the end of the pin list description
section of the product data sheet.
Also note that unused peripherals may have separate power connections.
These should be driven to the specified value.
25-10 ADSP-BF50x Blackfin Processor Hardware Reference