Supported ICs

IC	RTL8721Dx	RTL8726E	RTL8720E	RTL8730E
Supported	N	N	N	Y

Introduction

The RSA supports key lengths of 1024, 2048 and 3072 bits.

Note

The RSA can be accessed by NP and AP, but if multi-cores call the API to operate the RSA simultaneously, it will cause RSA function error.
Users must implement protective measures to ensure that only one core operates RSA at a certain time.

Usage

Enabling Clock for RSA Engine

Make sure that the function and clock of the RSA are enabled; otherwise, the function will hang.
```
RCC_PeriphClockCmd(APBPeriph_RSA, APBPeriph_CLOCK_NULL, ENABLE);
```
Starting RSA Engine Calculation

Initialize the parameters and call RSA_HW_EXP_MOD() to start RSA engine calculation.