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ST72411R bảng dữ liệu(PDF) 64 Page - STMicroelectronics

tên linh kiện ST72411R
Giải thích chi tiết về linh kiện  8-BIT MCU WITH SMARTCARD INTERFACE, LCD DRIVER, 8-BIT TIMER, SAFE RESET AND SUPPLY MONITORING
PDF  71 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST72411R bảng dữ liệu(HTML) 64 Page - STMicroelectronics

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8 DEVICE CONFIGURATION
Each device is available for production in user pro-
grammable versions (FLASH) as well as in factory
coded versions (ROM). FLASH devices are
shipped to customers with a default content (FFh),
while ROM factory coded parts contain the code
supplied by the customer. This implies that FLASH
devices have to be configured by the customer us-
ing the Option Bytes while the ROM devices are
factory-configured.
8.1 OPTION BYTE
The option byte allows the hardware configuration
of the microcontroller to be selected.
The option bytes have no address in the memory
map and can be accessed only in programming
mode (for example using a standard ST7 program-
ming tool). The default content of the FLASH is
fixed to FFh.
In masked ROM devices, the option bytes are
fixed in hardware by the ROM code (see option
list).
Bit 7:1 = Reserved, must always be 1.
Bit 0 = FMP
Full memory protection.
This option bit enables or disables external access
to the internal program memory (read-out protec-
tion). Clearing this bit causes the erasing (to 00h)
of the whole memory (including the option byte).
0: Program memory not read-out protected
1: Program memory read-out protected
OPTI ON BYTE
70
Reserved
FMP
Default
Value
1
111
11
1
0



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