EasyManuals Logo

ST STM32G0 1 Series User Manual

ST STM32G0 1 Series
1390 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Page #461 background imageLoading...
Page #461 background image
RM0444 Rev 5 461/1390
RM0444 True random number generator (RNG)
472
19.3.3 Random number generation
The true random number generator (RNG) delivers truly random data through its AHB
interface at deterministic intervals. Within its boundary the RNG implements the entropy
source model pictured on Figure 73.
It includes an analog noise source, a digitization stage with post-processing, a conditioning
algorithm, a health monitoring block and two interfaces that are used to interact with the
entropy source: GetEntropy and HealthTest.
Figure 73. Entropy source model
The components pictured above are detailed hereafter:
Noise source
The noise source is the component that contains the non-deterministic, entropy-providing
activity that is ultimately responsible for the uncertainty associated with the bitstring output
by the entropy source. It is composed of:
Two analog noise sources, each based on three XORed free-running ring oscillator
outputs. It is possible to disable those analog oscillators to save power, as described in
Section 19.3.8: RNG low-power usage.
A sampling stage of these outputs clocked by a dedicated clock input (rng_clk),
delivering a 2-bit raw data output.
This noise source sampling is independent to the AHB interface clock frequency (rng_hclk).
Note: In Section 19.6: RNG entropy source validation recommended RNG clock frequencies are
given.
MSv42099V2
Entropy source
Noise Source
Digitization
Post-processing
Raw data
Conditioning
Heath
tests
Output
(GetEntropy)
Error
message
(HealthTest)

Table of Contents

Questions and Answers:

Question and Answer IconNeed help?

Do you have a question about the ST STM32G0 1 Series and is the answer not in the manual?

ST STM32G0 1 Series Specifications

General IconGeneral
BrandST
ModelSTM32G0 1 Series
CategoryMicrocontrollers
LanguageEnglish

Related product manuals