tmp19a61f10xbg TOSHIBA Semiconductor CORPORATION, tmp19a61f10xbg Datasheet - Page 510

• Manufacturer Part Number: tmp19a61f10xbg
• Description: 32-bit Tx System Risc Tx19 Family
• Manufacturer: TOSHIBA Semiconductor CORPORATION

TMP19A61
21.2.3 User Boot Mode (Single chip mode)
User Boot mode is to use flash memory programming routine defined by users. It is used when
the data transfer buses for flash memory program code on the old application and for serial I/O
are different. It operates at the single chip mode; therefore, a switch from normal mode in which
user application is activated at the single chip mode to User Boot Mode for programming flash is
required. Specifically, add a mode judgment routine to a reset program in the old application.
The condition to switch the modes needs to be set by using the I/O of 19A61 in conformity with
the user’s system setup condition. Also, flash memory programming routine that the user
uniquely makes up needs to be set in the new application. This routine is used for programming
after being switched to User Boot Mode. The execution of the programming routine must take
place while it is stored in the area other than the flash memory since the data in the internal flash
memory cannot be read out during delete/ writing mode. Once re-programming is complete, it is
recommended to protect relevant flash blocks from accidental corruption during subsequent
Single-Chip (Normal mode) operations. All the interruption including a non-maskable are
inhibited at User Boot Mode.
(1-A) and (1-B) are the examples of programming with routines in the internal flash memory and
in the external memory. For a detailed description of the erase and program sequence, refer to
21.3 On-board Programming of Flash Memory (Rewrite/Erase).
TMP19A61 (rev1.0) 22-509