ST10F280_12 datasheet(31/239 Pages) STMICROELECTRONICS

31 / 239 page

ST10F280

Internal Flash memory

Doc ID 8673 Rev. 3

31/239

Internal Flash memory

5.1

Overview

●

512K Byte on-chip Flash memory

●

Two possibilities of Flash mapping into the CPU address space

●

Flash memory can be used for code and data storage

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32-bit, zero waitstate read access (50ns cycle time at fCPU = 40MHz)

●

Erase-Program Controller (EPC) similar to M29F400B STM’s stand-alone Flash

memory

–

Word-by-Word Programmable (16

μs typical)

–

Data polling and Toggle Protocol for EPC Status

–

Internal Power-On detection circuit

●

Memory Erase in blocks

–

One 16K Byte, two 8K Byte, one 32K Byte, seven 64K Byte blocks

–

Each block can be erased separately (1.5 second typical)

–

Chip erase (8.5 second typical)

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Each block can be separately protected against programming and erasing

–

Each protected block can be temporary unprotected

–

When enabled, the read protection prevents access to data in Flash memory using

a program running out of the Flash memory space. Access to data of internal

Flash can only be performed with an inner protected program

●

Erase Suspend and Resume Modes

–

Read and Program another Block during erase suspend

●

Single Voltage operation, no need of dedicated supply pin

●

Low Power Consumption:

–

45mA max. Read current

–

60mA max. Program or Erase current

–

Automatic Stand-by-mode (50

μA maximum)

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100,000 Erase-Program Cycles per block, 20 year data retention time

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Operating temperature: -40 to +125oC

5.2

Operational overview

5.2.1

Read mode

In standard mode (the normal operating mode) the Flash appears like an on-chip ROM with

the same timing and functionality. The Flash module offers a fast access time, allowing zero

waitstate access with CPU frequency up to 40MHz. Instruction fetches and data operand

reads are performed with all addressing modes of the ST10F280 instruction set.

In order to optimize the programming time of the internal Flash, blocks of 8K Bytes,

16K Bytes, 32K Bytes, 64K Bytes can be used. But the size of the blocks does not apply to

the whole memory space, see details in Table 2.

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