tmp19a43fd TOSHIBA Semiconductor CORPORATION, tmp19a43fd Datasheet - Page 69

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

4.5.2
register ROMSEC1<RSECON>=“1".
state of ROM 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
ROM data protecting on built-in ROM.
when protecting is released, and writing protecting code “0x0000_003D" in ROM protecting lock
register ROMSEC2. Moreover, ROM data protecting function can be set again by similarly setting
ROM protecting register ROMSEC1<RSECON>“1" when ROM protecting is set, and writing
protecting code “0x0000_003D" in ROM protecting lock register ROMSEC2.
data because of the register only for writing.
by power-on reset, and the value doesn't usually change in reset.
ROM data protecting is effective the flash protecting and becomes effective at ROM protecting
After releasing reset, the RSECON bit is initialized by "1". The flash protecting is sure to enter the
When ROM protecting register is rewritten with ROM data protected, rewriting can be executed only
ROM data protecting is released by setting ROM protecting register ROMSEC1<RSECON>“0"
It is necessary to note the ROMSEC2 register because the reading data is different from original write
The initialization of ROM protecting register is different in the flash version and the mask version.
It provides with the power-on reset circuit in the flash version, ROM 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.
ROM data Protect
It is not possible to access it excluding built-in
ROM at the time of ROM data
TMP19A43 (rev2.0) 4-10
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Various protecting functions
TMP19A43