tmp19a43fd TOSHIBA Semiconductor CORPORATION, tmp19a43fd Datasheet - Page 62

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

TMP19A43
4.2.3
DSU Protect
The DSU protecting function is a function for invalidating the connection of DSU-probe to enable third
parties other than the user to read the data of a built-in flash easily.
When SEQMOD register < DSUOFF > bit is "1", the DSU protecting becomes effective with FLASH
protected.
In the DSUOFF bit, the flash version, the mask version, and the state of the first stage are "1. "It enters
the state of the DSU protecting as long as the FLASH protecting is always effective in the mask version,
and the DSUOFF bit is not set to "0" by the user program.
It doesn't enter the state of the DSU protecting if protecting is not put on all blocks of FLASH in the
flash version. An initial state enters the state of the DSU protecting as well as the mask version when
FLASH is being protected putting protecting on all blocks of FLASH.
(note)
The DSUOFF bit can be accessed only with the instruction put on built-in ROM in the state of ROM
data protecting. It is necessary to note it because it is necessary to put the program of the DSU
protecting release on built-in ROM.
TMP19A43 (rev2.0) 4-3
Various protecting functions