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ST72344S4 bảng dữ liệu(PDF) 34 Page - STMicroelectronics

tên linh kiện ST72344S4
Giải thích chi tiết về linh kiện  SCI asynchronous serial interface
PDF  247 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
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ST72344S4 bảng dữ liệu(HTML) 34 Page - STMicroelectronics

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Data EEPROM
ST72344xx, ST2345xx
34/247
Doc ID 12321 Rev 6
5.6
Data EEPROM readout protection
The readout protection is enabled through an option bit (see Section 15.1: Option bytes).
When this option is selected, the programs and data stored in the EEPROM memory are
protected against read-out (including a rewrite protection). In Flash devices, when this
protection is removed by reprogramming the option byte, the entire Program memory and
EEPROM is first automatically erased.
Note:
Both program memory and data EEPROM are protected using the same option bit.
Figure 10.
Data EEPROM programming cycle
E2LAT
ERASE CYCLE
WRITE CYCLE
E2PGM
tPROG
READ OPERATION NOT POSSIBLE
WRITE OF
DATA
READ OPERATION POSSIBLE
INTERNAL
PROGRAMMING
VOLTAGE
LATCHES
I bit in CC register
All interrupts must be masked 1)
Note 1: refer to Programming of EEPROM data



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