RH850 datasheet(12/66 Pages) RENESAS

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Data Flash Access Library - Type T01, European Release

Architecture

R01US0079ED0103

User Manual



Data Flash Hardware: This functional block represents the Flash Programming Hardware

controlled by the FDL.

2.2 Pool Definitions

The FDL pool defines the Flash blocks, the user application and a potential EEPROM Emulation (EEL)

may use for FDL Flash access. The limits of the FDL pool are taken into consideration by any of the FDL

Flash access commands. The user can define the size of the FDL pool freely at project run-time during

library initialization.

The FDL pool provides the space for the EEL Pool which is allocated by the EEL inside the FDL pool. The

EEL Pool provides the Flash space for the EEL to store the emulation data and management information.

All FDL pool space not allocated by the EEL Pool is freely usable by the user application, so is called the

User Pool.

2.3 Architecture related notes



All Data Flash related operations are executed by the FDL. Thus, the application cannot access

(Erase, Write ...) the Data Flash directly. An exception is Reading the Flash contents. As the

Flash is mapped to the CPU address space, it can be directly read by the CPU. The FDL provides

an additional read operation that will take care of possible ECCs (error correction code) errors to

allow error polling.



The FDL allows accessing the Data Flash only.

Figure 2: Pools overview

User Pool

EEL Pool

User Pool

Data Flash / FDL Pool

FDL Pool

RH850 Datasheet(PDF) 12 Page - Renesas Technology Corp