Random Number Generator (RNG)
6-6
Freescale Semiconductor
MCF52235 ColdFire® Integrated Microcontroller Reference Manual, Rev. 6
6.4
Initialization/Application Information
The intended general operation of the RNG is as follows:
1. Reset/initialize.
2. Write to the RNG entropy register (optional).
3. Write to the RNG control register and set the interrupt mask, high assurance, and GO bits.
4. Poll RNGSR[OFL] to check for random data in RNGOUT.
5. Read available random data from RNGOUT.
6. Repeat steps 3 and 4 as needed.
Because
of
an
order
from
the
United
States
International
Trade
Commission,
BGA-packaged
product
lines
and
part
numbers
indicated
here
currently
are
not
available
from
Freescale
for
import
or
sale
in
the
United
States
prior
to
September
2010:MCF52234CVM60,
MCF52235CVM60
