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TMP92FD54AI データシート(PDF) 26 Page - Toshiba Semiconductor

部品番号 TMP92FD54AI
部品情報  CMOS 32-bit Micro-controller
PDF  84 Pages
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メーカー  TOSHIBA [Toshiba Semiconductor]
ホームページ  http://www.semicon.toshiba.co.jp/eng
Logo TOSHIBA - Toshiba Semiconductor

TMP92FD54AI データシート(HTML) 26 Page - Toshiba Semiconductor

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2006-01-27
92FD54AI-26
TMP92FD54AI
Single Boot Mode
(2-A) Using the rewrite algorithm in the internal boot ROM
(Step 1)
The state of the flash memory is not important; it may contain the old version of the
user program or it may have been erased. Since the rewriting routine and rewrite data
are transferred via SIO (SIO1), the device’s SIO (SIO1) and the external controller should
be connected on the board. The user must ensure that (a), the rewrite routine, is present
on the controller.
(Step 2)
To turn the boot ROM on, Reset must be de-asserted by setting the input pins
accordingly. (a), the rewriting routine, must be transferred from the source (the
controller) into the device via SIO. Before this is carried out, however, the password
entered by the user must be checked against the password registered on the user
application program. (When the flash memory has been erased, erase data
(“0xFF”12byte ) is used as the password.)
(TMP92FD54AI)
Flash memory
RAM
Contains old user
application program
(or has been erased).
(Controller)
New user
application program
(I/O)
(a) Rewrite routine
Boot ROM
SIO1
(TMP92FD54AI)
(Controller)
(I/O)
0
→ 1 RESET
New user
application program
(a) Rewrite routine
Flash memory
RAM
Old user application
program (or erased)
Boot ROM
SIO1



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