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STM8S007C8T6TR(2015) View Datasheet(PDF) - STMicroelectronics

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STM8S007C8T6TR Datasheet PDF : 92 Pages
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STM8S007C8
Product overview
The size of the UBC is programmable through the UBC option byte (Table 12), in increments
of 1 page (512 bytes) by programming the UBC option byte in ICP mode.
This divides the program memory into two areas:
ï‚· Main program memory: 64 Kbytes minus UBC
ï‚· User-specific boot code (UBC): Configurable up to 64 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
Data
EEPROM
memory
64 Kbytes
Flash
program
memory
Data memory area (up to 2 Kbytes)
Option bytes
UBC area
Remains write protected during IAP
Program memory area
Write access possible for IAP
Programmable area from 1 Kbyte
(2 first pages) up to 64 Kbytes
(1 page steps)
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.
DocID022171 Rev 5
13/92
25

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