tmp19a43fd TOSHIBA Semiconductor CORPORATION, tmp19a43fd Datasheet - Page 70

• Manufacturer Part Number: tmp19a43fd
• Description: 32-bit Risc Microprocessor
• Manufacturer: TOSHIBA Semiconductor CORPORATION

4.5.3
SEQMOD<RSECON>=“1".
state of DSU data protecting in the mask version after releasing reset because it is always effective.
It decides whether to enter the state of ROM data protecting by the state of the flash protecting in the
flash version.
from the program put on built-in ROM. Therefore, it is necessary to prepare the release program of
DSU data protecting on built-in ROM.
protecting is released, and writing protecting code “0x0000_00C5" in ROM protecting lock register
SEQCNT. Moreover, DSU protecting function can be set again by similarly setting ROM protecting
register SEQMOD<DSUOFF>“1" when DSU protecting is set, and writing protecting code
“0x0000_00C5" in DSU protecting lock register SEQCNT.
data because of the register only for writing.
by power-on reset, and the value doesn't usually change in reset.
DSU data protecting is effective the flash protecting and becomes effective at DSU protecting register
After releasing reset, the DSUOFF bit is initialized by "1". The flash protecting is sure to enter the
When DSU protecting register is rewritten with ROM data protected, rewriting can be executed only
DSU protecting is released by setting DSU protecting register SEQMOD<DSUOFF>“0" when
It is necessary to note the SEQCNT register because the reading data is different from original write
The initialization of DSU protecting register is different in the flash version and the mask version.
It provides with the power-on reset circuit in the flash version, DSU protecting register is initialized
It is usually initialized by reset in the mask version because power-on reset is not provided.
It is necessary to note it in the mask version because it is usually initialized at each reset.
DSU Protect
It is not possible to access it excluding built-in
ROM at the time of ROM data
TMP19A43 (rev2.0) 4-11
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FLASH protection
Various protecting functions
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TMP19A43