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参数资料
型号： STM8AF52A9TDX
厂商： STMICROELECTRONICS
元件分类： 微控制器/微处理器
英文描述： 8-BIT, FLASH, 24 MHz, MICROCONTROLLER, PQFP64
封装： 10 X 10 MM, ROHS COMPLIANT, LQFP-64
文件页数： 30/120页
文件大小： 2236K
代理商： STM8AF52A9TDX
STM8AF52/62xx, STM8AF51/61xx
Product overview
Doc ID 14395 Rev 7
17/120
5.4.2
Write protection (WP)
Write protection in application mode is intended to avoid unintentional overwriting of the
memory. The write protection can be removed temporarily by executing a specific sequence
in the user software.
5.4.3
Protection of user boot code (UBC)
If the user chooses to update the program memory using a specific boot code to perform in
application programming (IAP), this boot code needs to be protected against unwanted
modification.
In the STM8A a memory area of up to 128 Kbytes can be protected from overwriting at user
option level. Other than the standard write protection, the UBC protection can exclusively be
modified via the debug interface, the user software cannot modify the UBC protection status.
The UBC memory area contains the reset and interrupt vectors and its size can be adjusted
in increments of 512 bytes by programming the UBC and NUBC option bytes
(see Section 9: Option bytes on page 59).
Figure 2.
Flash memory organization of STM8A products
5.4.4
Read-out protection (ROP)
The STM8A provides a read-out protection of the code and data memory which can be
activated by an option byte setting (see the ROP option byte in section 10).
The read-out protection prevents reading and writing program memory, data memory and
option bytes via the debug module and SWIM interface. This protection is active in all device
operation modes. Any attempt to remove the protection by overwriting the ROP option byte
triggers a global erase of the program and data memory.
The ROP circuit may provide a temporary access for debugging or failure analysis. The
temporary read access is protected by a user defined, 8-byte keyword stored in the option
Programmable area from 1 Kbyte
Data
UBC area
Program memory area
Data memory area
(first two pages) up to program memory
EEPROM
Remains write protected during IAP
memory
Write access possible for IAP
Option bytes
end - maximum 128 Kbytes
Flash
program
memory
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相关代理商/技术参数
参数描述
STM8AF52A9TDY 功能描述:8位微控制器 -MCU 8-Bit Automotive MCU CAN Line 128kb Flash RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
STM8AF52AA 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Automotive 8-bit MCU, with up to 128 Kbytes Flash, data EEPROM
STM8AF52AATAY 功能描述:8位微控制器 -MCU 8-Bit Automotive MCU CAN Line 128kb Flash RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
STM8AF52AATCX 制造商:STMicroelectronics 功能描述:
STM8AF52AATCY 功能描述:8位微控制器 -MCU Automotive 8-Bit MCU Rev U 128KIbit 80Pin RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
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