mcf51jf128 Freescale Semiconductor, Inc, mcf51jf128 Datasheet - Page 607

• Manufacturer Part Number: mcf51jf128
• Description: Mcf51jf128 Reference Manual
• Manufacturer: Freescale Semiconductor, Inc

Chapter 27
Random Number Generator (RNGB)
27.1 Introduction
The purpose of the RNGB is to generate cryptographically strong random data. It uses a
true random number generator (TRNG) and a pseudo-random number generator (PRNG)
to achieve true randomness and cryptographic strength. The RNGB generates random
numbers for secret keys, per message secrets, random challenges, and other similar
quantities used in cryptographic algorithms.
This chapter describes the random number generator (RNGB), including a programming
model, functional description, and application information.
27.1.1 Block Diagram
The below figure shows the RNGB's three main blocks: PRNG, TRNG, and XSEED
generator.
Random Number Generator
XSEED
PRNG
TRNG
Generator
SIM
FSM
Reseed
Registers &
Internal Bus Interface
Internal Bus
Figure 27-1. RNG Block Diagram
MCF51JF128 Reference Manual, Rev. 2, 03/2011
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