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参数资料
| 型号： | ST72324K6B3/XXX |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP32 |
| 封装： | 0.400 INCH, SHRINK, PLASTIC, DIP-32 |
| 文件页数： | 67/157页 |
| 文件大小： | 1037K |
| 代理商： | ST72324K6B3/XXX |
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ST72324J/K
17/157
4 FLASH PROGRAM MEMORY
4.1 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 individu-
al sectors and programmed on a Byte-by-Byte ba-
sis 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 organisation allows each sector
to be erased and reprogrammed without affecting
other sectors.
4.2 Main Features
s
Three 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.
– IAP (In-Application Programming) In this
mode, all sectors except Sector 0, can be pro-
grammed or erased without removing the de-
vice from the application board and while the
application is running.
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
4.3 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 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 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
4.3.1 Read-out Protection
Read-out protection, when selected, makes it im-
possible to extract the memory content from the
microcontroller, thus preventing piracy. Even ST
cannot access the user code.
In flash devices, this protection is removed by re-
programming the option. In this case, the entire
program memory is first automatically erased.
Read-out protection selection depends on the de-
vice type:
– In Flash devices it is enabled and removed
through the FMP_R bit in the option byte.
– In ROM devices it is enabled by mask option
specified in the Option List.
4.3.2 Flash Write/Erase Protection
Write/erase protection, when set, makes it impos-
sible to both overwrite and erase program memo-
ry. Once set, the Write/erase protection can never
be removed.
Write/erase protection is enabled through the
FMP_W bit in the option byte.
Figure 6. Memory Map and Sector Address
Flash 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
FLASH
FFFFh
EFFFh
DFFFh
3FFFh
7FFFh
1000h
24 Kbytes
MEMORY SIZE
8 Kbytes
40 Kbytes 52 Kbytes
9FFFh
BFFFh
D7FFh
4K
10K
24K
48K
相关PDF资料 |
PDF描述 |
|---|---|
| ST72324J6B3/XXX | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP42 |
| ST72324J6T3/XXX | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP44 |
| ST72325J4B6/XXX | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP42 |
| ST72325J6B3/XXX | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP42 |
| ST72325K6B6/XXX | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP32 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ST72324K6T | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-BIT MCU WITH NESTED INTERRUPTS, FLASH, 10-BIT ADC, 4 TIMERS, SPI, SCI INTERFACE |
| ST72324Kx | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5V RANGE 8-BIT MCU WITH 8 TO 32K FLASH,10-BIT ADC, 4 TIMERS,SPI,SCI INTERFACE |
| ST72324LJ2 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:3V range 8-bit MCU with 8 to 32K Flash/ROM, 10-bit ADC, 4 timers, SPI, SCI interface |
| ST72324LJ4 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:3V range 8-bit MCU with 8 to 32K Flash/ROM, 10-bit ADC, 4 timers, SPI, SCI interface |
| ST72324LJ6 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:3V range 8-bit MCU with 8 to 32K Flash/ROM, 10-bit ADC, 4 timers, SPI, SCI interface |
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