参数资料
型号: ST72F60E1M1
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDSO24
封装: 0.300 INCH, LEAD FREE, PLASTIC, SOP-24
文件页数: 49/139页
文件大小: 1993K
代理商: ST72F60E1M1
ST7260xx
Flash program memory
17/139
5
Flash program memory
5.1
Introduction
The ST7 dual voltage High Density Flash (HDFlash) is a non-volatile memory that can be
electrically erased as a single block or by individual sectors and programmed on a byte-by-
byte basis using an external VPP supply.
The HDFlash devices can be programmed and erased off-board (plugged in a programming
tool) or on-board using ICP (in-circuit programming) or IAP (in-application programming).
The array matrix organization allows each sector to be erased and reprogrammed without
affecting other sectors.
5.2
Main features
3 Flash programming modes:
Insertion in a programming tool. In this mode, all sectors including option bytes
can be programmed or erased.
ICP (in-circuit programming). In this mode, all sectors including option bytes can
be programmed or erased without removing the device from the application board.
IAP (in-application programming). In this mode, all sectors, except Sector 0, can
be programmed or erased without removing the device from the application board
and while the application is running.
ICT (in-circuit testing) for downloading and executing user application test patterns in
RAM
Readout protection
Register Access Security System (RASS) to prevent accidental programming or
erasing
5.3
Structure
The Flash memory is organized in sectors and can be used for both code and data storage.
Depending on the overall Flash memory size in the microcontroller device, there are up to
three user sectors (seeTable 6). Each of these sectors can be erased independently to avoid
unnecessary erasing of the whole Flash memory when only a partial erasing is required.
The first two sectors have a fixed size of 4 Kbytes (see Figure 5). They are mapped in the
upper part of the ST7 addressing space so the reset and interrupt vectors are located in
Sector 0 (F000h-FFFFh).
Table 6.
Sectors available in Flash devices
Flash size (bytes)
Available sectors
4K
Sector 0
8K
Sectors 0, 1
>8K
Sectors 0, 1, 2
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