ST72344S2 datasheet(27/247 Pages) STMICROELECTRONICS

27 / 247 page

ST72344xx, ST2345xx

Flash program memory

Doc ID 12321 Rev 6

27/247

Flash program memory

4.1

Introduction

The ST7 single voltage extended Flash (XFlash) is a non-volatile memory that can be

electrically erased and programmed either on a byte-by-byte basis or up to 32 bytes in

parallel.

The XFlash devices can be programmed off-board (plugged in a programming tool) or on-

board using In-Circuit Programming or In-Application Programming.

The array matrix organization allows each sector to be erased and reprogrammed without

affecting other sectors.

4.2

Main features

●

ICP (in-circuit programming)

●

IAP (in-application programming)

●

ICT (in-circuit testing) for downloading and executing user application test patterns in

RAM

●

Sector 0 size configurable by option byte

●

Read-out and write protection

4.3

Programming modes

The ST7 can be programmed in three different ways:

●

Insertion in a programming tool

In this mode, Flash sectors 0 and 1, option byte row and data EEPROM (if present) can

be programmed or erased.

●

In-circuit programming

In this mode, Flash sectors 0 and 1, option byte row and data EEPROM (if present) can

be programmed or erased without removing the device from the application board.

●

In-application programming

In this mode, sector 1 and data EEPROM (if present) can be programmed or erased

without removing the device from the application board and while the application is

running.

ST72344S2 Datasheet(PDF) 27 Page - STMicroelectronics

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