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参数资料
| 型号： | ST7SCR |
| 厂商： | 意法半导体 |
| 英文描述： | 8-BIT LOW-POWER, FULL-SPEED USB MCU WITH 16K FLASH, 768 RAM, SMARTCARD I/F, TIMER |
| 中文描述： | 8位低功耗，全速USB微控制器与16K的闪存，768内存，智能卡的I /楼，计时器 |
| 文件页数： | 14/102页 |
| 文件大小： | 1413K |
| 代理商： | ST7SCR |
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ST7SCR
14/102
4 FLASH PROGRAM MEMORY
4.1 Introduction
The ST7 dual voltage High Density Flash (HD-
Flash) is a non-volatile memory that can be electri-
cally erased as a single block or by individual sec-
tors and programmed on a Byte-by-Byte basis us-
ing an external V
PP
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
I
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.
I
ICT (In-Circuit Testing) for downloading and
executing user application test patterns in RAM
I
Read-out protection against piracy
I
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 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
Figure 6. Memory map and sector address
Flash Memory Size
(bytes)
Available Sectors
4K
8K
> 8K
Sector 0
Sectors 0,1
Sectors 0,1, 2
4 Kbytes
SECTOR 0
4 Kbytes
SECTOR 1
SECTOR 2
16K USER FLASH MEMORY SIZE
FFFFh
F000h
EFFFh
E000h
DFFFh
C000h
8 Kbytes
ex.: user program
ex.: user data
+ library
ex.: user system library
+ IAP BootLoader
1
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| ST7SCR1R4T1 | Enclosures; External Depth:18.50"; External Height:47.312"; External Width:22"; Panel Width:19.00"; Enclosure Color:Royal Blue; Enclosure Material:Steel; Panel Space:42.00" RoHS Compliant: Yes |
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| ST7SCR1E4M1 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-BIT LOW-POWER, FULL-SPEED USB MCU WITH 16K FLASH, 768 RAM, SMARTCARD I/F, TIMER |
| ST7SCR1R4 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-BIT LOW-POWER, FULL-SPEED USB MCU WITH 16K FLASH, 768 RAM, SMARTCARD I/F, TIMER |
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