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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STM8S207MB датащи(PDF) 15 Page - STMicroelectronics |
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STM8S207MB датащи(HTML) 15 Page - STMicroelectronics |
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15 / 103 page  STM8S207xx, STM8S208xx Product overview Doc ID 14733 Rev 12 15/103 The size of the UBC is programmable through the UBC option byte (Table 13.), in increments of 1 page (512 bytes) by programming the UBC option byte in ICP mode. This divides the program memory into two areas: ● Main program memory: Up to 128 Kbytes minus UBC ● User-specific boot code (UBC): Configurable up to 128 Kbytes The UBC area remains write-protected during in-application programming. This means that the MASS keys do not unlock the UBC area. It protects the memory used to store the boot program, specific code libraries, reset and interrupt vectors, the reset routine and usually the IAP and communication routines. Figure 2. Flash memory organisation Read-out protection (ROP) The read-out protection blocks reading and writing the Flash program memory and data EEPROM memory in ICP mode (and debug mode). Once the read-out protection is activated, any attempt to toggle its status triggers a global erase of the program and data memory. Even if no protection can be considered as totally unbreakable, the feature provides a very high level of protection for a general purpose microcontroller. Programmable area from 1 Kbyte Data UBC area Program memory area Data memory area (2 Kbytes) (2 first pages) up to 128 Kbytes EEPROM Remains write protected during IAP memory 128 Kbytes Flash Up to Write access possible for IAP program memory (1 page steps) Option bytes |
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