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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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TMP86FS28DFG датащи(PDF) 252 Page - Toshiba Semiconductor |
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TMP86FS28DFG датащи(HTML) 252 Page - Toshiba Semiconductor |
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252 / 272 page  Page 240 18. Serial PROM Mode 18.10 Passwords TMP86FS28DFG Figure 18-5 Password Comparison 18.10.1Password String The password string transmitted from the external controller is compared with the specified data in the flash memory. When the password string is not matched to the data in the flash memory, the device enters the halt condition due to the password error. 18.10.2Handling of Password Error If a password error occurs, the device enters the halt condition. In this case, reset the device to reactivate the serial PROM mode. 18.10.3Password Management during Program Development If a program is modified many times in the development stage, confusion may arise as to the password. Therefore, it is recommended to use a fixed password in the program development stage. Example :Specify PNSA to F000H, and the password string to 8 bytes from address F001H (PCSA becomes F001H.) Password Section code abs = 0F000H DB 08H : PNSA definition DB “CODE1234” : Password string definition 08H 01H 02H 03H 04H 05H 08H F012H F107H F108H Flash memory F109H F10AH F10BH F10CH UART F0H 12H F1H 07H 01H 02H 03H 04H 05H 06H 07H 08H PNSA PCSA Password string 06H 07H F10DH F10EH "08H" becomes the umber of passwords 8 bytes Compare Example PNSA = F012H PCSA = F107H Password string = 01H,02H,03H,04H,05H 06H,07H,08H RXD pin |
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