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参数资料
| 型号： | ST72F611F1M1 |
| 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, PDSO20 |
| 封装： | 0.300 INCH, PLASTIC, SOIC-20 |
| 文件页数： | 3/71页 |
| 文件大小： | 403K |
| 代理商： | ST72F611F1M1 |
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ST7261
11/71
3 FLASH PROGRAM MEMORY
3.1 Introduction
The ST7 dual voltage Flash is a non-volatile mem-
ory 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 Flash devices can be programmed and
erased off-board (plugged in a programming tool)
or on-board using ICP (In-Circuit Programming).
The array matrix organisation allows each sector
to be erased and reprogrammed without affecting
other sectors.
3.2 Main Features
s
Two Flash programming modes:
– Insertion in a programming tool. In this mode,
all sectors including option bytes can be pro-
grammed or erased.
– ICP (In-Circuit Programming). In this mode, all
sectors including option bytes can be pro-
grammed or erased without removing the de-
vice from the application board.
s
ICT (In-Circuit Testing) for downloading and
executing user application test patterns in RAM
s
Read-out protection against piracy
s
Register Access Security System (RASS) to
prevent accidental programming or erasing
3.3 Structure
The Flash memory is organised 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 (see Table 3). Each of these sectors
can be erased independently to avoid unneces-
sary 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 6). They are mapped in the upper part
of the ST7 addressing space so the reset and in-
terrupt vectors are located in Sector 0 (F000h-
FFFFh).
Table 3. Sectors available in FLASH devices
3.4 Program Memory Read-out Protection
The read-out protection is enabled through an op-
tion bit.
For Flash devices, when this option is selected,
the program and data stored in the program mem-
ory (Flash or ROM) are protected against read-out
piracy (including a re-write protection). In Flash
devices, when this protection is removed by repro-
gramming the Option Byte, the entire program
memory is first automatically erased.
Refer to the Option Byte description for more de-
tails.
Figure 6. Memory Map and Sector Address
Flash Memory Size
(bytes)
Available Sectors
4K
Sector 0
8K
Sectors 0,1
> 8K
Sectors 0,1, 2
4 Kbytes
2 Kbytes
SECTOR 1
SECTOR 0
16 Kbytes
SECTOR 2
8K
16K
32K
60K
DV FLASH
FFFFh
EFFFh
DFFFh
3FFFh
7FFFh
1000h
24 Kbytes
MEMORY SIZE
8 Kbytes
40 Kbytes 52 Kbytes
9FFFh
BFFFh
D7FFh
4K
10K
24K
48K
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