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TMP86FS28DFG 데이터시트(PDF) 252 Page - Toshiba Semiconductor

부품명 TMP86FS28DFG
상세설명  8 Bit Microcontroller
PDF  272 Pages
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제조업체  TOSHIBA [Toshiba Semiconductor]
홈페이지  http://www.semicon.toshiba.co.jp/eng
Logo TOSHIBA - Toshiba Semiconductor

TMP86FS28DFG 데이터시트(HTML) 252 Page - Toshiba Semiconductor

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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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