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ST8500 数据表(PDF) 20 Page - STMicroelectronics |
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ST8500 数据表(HTML) 20 Page - STMicroelectronics |
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20 / 37 page ![]() Device architecture ST8500 20/37 DocID031029 Rev 3 “Reserved1” modes is selected the bootloader automatically jumps to the RAM code starting address. In this case, the user can access to the device through the JTAG if not locked. The system JTAG is not accessible during the execution of the bootloader procedure. At the end of the bootloader, it becomes accessible. It is also possible by means of an appropriate user security bit in the OTP memory (see Section 2.4.4 on page 14), to keep the JTAG port locked even after the boot procedure, to avoid unwanted accesses to the core and memories. |
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