RH850 datasheet(11/66 Pages) RENESAS

11 / 66 page

Data Flash Access Library - Type T01, European Release

Architecture

R01US0079ED0103

User Manual

Chapter 2

Architecture

This chapter introduces the basic software architecture of the FDL and provides the necessary

background for application designers to understand and effectively use the library. Please read this

chapter carefully before moving on to the details of the API description.

2.1 Layered Architecture

This chapter describes the function of all blocks belonging to the EEPROM Emulation System (EES).

Even though this manual describes the functional block FDL, a short description of all concerned

functional blocks and their relationship can be beneficial for the general understanding.

As depicted in the figure above, the software architecture of the EEPROM Emulation System is built up of

several blocks:



User Application: This functional block will use functions offered by the FDL and EEL. The user

shall take care that FDL functions are not used at the same time while EEL is operating. Please

refer to EEL documentation for how to stop EEL execution in order to safely access FDL

functions.



EEPROM Emulation Library (EEL): This functional block offers all functions and commands that

the “User Application” block can use in order to handle its EEPROM data.



Data Flash Access Library (FDL): The Data Flash Access Library is the subject of this manual.

It should offer an access interface to any user-

defined flash area, the so called “FDL-pool”

(described in next chapter). Beside the initialization function, the FDL allows the execution of

access-commands like write/blank check as well as suspend-able erase command.

User Application

EEL

FDL

Data Flash Hardware

Code Flash

Figure 1: Symbolic relationship between the EES functional blocks

RH850 Datasheet(PDF) 11 Page - Renesas Technology Corp