ST10F272M datasheet(25/175 Pages) STMICROELECTRONICS

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ST10F272M

Internal Flash memory

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Internal Flash memory

5.1

Overview

The on-chip Flash is composed of one matrix module, 256 Kbytes wide. This module is

called IFlash because it is on the ST10 Internal bus.

Figure 5.

Flash structure

The programming operations of the Flash are managed by an embedded Flash

Program/Erase Controller (FPEC). The high voltages needed for Program/Erase operations

are generated internally.

The Data bus is 32-bit wide for fetch accesses to IFlash, whereas it is 16-bit wide for read

accesses to IFlash Control Registers. Write accesses are possible only in the IFlash Control

Registers area.

5.2

Functional description

5.2.1

Structure

Table 3 below shows the address space reserved for the Flash module.

5.2.2

Modules structure

The IFlash module is composed of a bank (Bank 0) of 256 Kbytes of Program Memory

divided in eight sectors (B0F0...B0F7). Bank 0 also contains a reserved sector named Test-

Flash.

Flash Control

Bank 0: 256 Kbyte

Program Memory

HV and Ref.

Generator

Program/Erase

Controller

I-Bus Interface

8 Kbyte Test-Flash

IFlash

Control Section

Registers

Table 3.

Address space reserved for the Flash module

Description

Addresses

Size

IFlash sectors

0x00 0000 to 0x04 FFFF

256 Kbytes

Reserved IBus area

0x05 0000 to 0x07 FFFF

192 Kbytes

Registers and Flash internal reserved area

0x08 0000 to 0x08 FFFF

64 Kbytes

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