ST10F280_12 datasheet(32/239 Pages) STMICROELECTRONICS

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Internal Flash memory

ST10F280

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Doc ID 8673 Rev. 3

5.2.2

Instructions and commands

All operations besides normal read operations are initiated and controlled by command

sequences written to the Flash Command Interface (CI). The Command Interface (CI)

interprets words written to the Flash memory and enables one of the following operations:

●

Read memory array

●

Program word

●

Block erase

●

Chip erase

●

Erase suspend

●

Erase resume

●

Block protection

●

Block temporary unprotection

●

Code protection

Commands are composed of several write cycles at specific addresses of the Flash

memory. The different write cycles of such command sequences offer a fail-safe feature to

protect against an inadvertent write.

A command only starts when the Command Interface has decoded the last write cycle of an

operation. Until that last write is performed, Flash memory remains in Read Mode

Note:

As it is not possible to perform write operations in the Flash while fetching code from Flash,

the Flash commands must be written by instructions executed from internal RAM or external

memory.

Command write cycles do not need to be consecutively received, pauses are allowed, save

for Block Erase command. During this operation all Erase Confirm commands must be sent

to complete any block erase operation before time-out period expires (typically 96

μs).

Command sequencing must be followed exactly. Any invalid combination of commands will

reset the Command Interface to Read Mode.

Table 2.

512 Kbyte Flash memory block organization

Block

Addresses (segment 0)

Addresses (segment 1)

Size (Kbyte)

00’0000h to 00’3FFFh

00’4000h to 00’5FFFh

00’6000h to 00’7FFFh

01’8000h to 01’FFFFh

02’0000h to 02’FFFFh

03’0000h to 03’FFFFh

04’0000h to 04’FFFFh

05’0000h to 05’FFFFh

06’0000h to 06’FFFFh

07’0000h to 07’FFFFh

08’0000h to 08’FFFFh

01’0000h to 01’3FFFh

01’4000h to 01’5FFFh

01’6000h to 01’7FFFh

01’8000h to 01’FFFFh

02’0000h to 02’FFFFh

03’0000h to 03’FFFFh

04’0000h to 04’FFFFh

05’0000h to 05’FFFFh

06’0000h to 06’FFFFh

07’0000h to 07’FFFFh

08’0000h to 08’FFFFh

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