tmp89fm42k TOSHIBA Semiconductor CORPORATION, tmp89fm42k Datasheet - Page 335

• Manufacturer Part Number: tmp89fm42k
• Description: 8 Bit Microcontroller Tlcs-870/c1 Series
• Manufacturer: TOSHIBA Semiconductor CORPORATION

RA006
21.2
21.2.1
Functions
execution of the flash memory command sequence and the toggle operation can be disabled (the flash memory
can be write protected) by making an appropriate control register setting (write protect). To enable the execution
of the command sequence and the toggle operation, set FLSCR1<FLSMD> to "0y101", and then set "0xD5" on
FLSCR2<CR1EN>. To disable the execution of the command sequence, set FLSCR1<FLSMD> to "0y010", and
then set "0xD5" on FLSCR2<CR1EN>. If the command sequence or the toggle operation is executed with the
execution of the command sequence and the toggle operation set to "disable", the executed command sequence
or toggle operation takes no effect.
FLSCR1<FLSMD> should normally be set to "0y010" except when a write or erase is to be performed on the
flash memory.
<FLSMD>)
Note 1: If "0xD5" is set on FLSCR2<CR1EN> with FLSCR1<FLSMD> set to "101", the flash memory goes into an
Note 2: If FLSCR1<FLSMD> is set to "disable", subsequent commands (write instructions) generated are rejected
To prevent inadvertent writes to the flash memory due to program error or microcontroller malfunction, the
After a reset, FLSCR1<FLSMD> is initialized to "0y010" to disable the execution of the command sequence.
Flash memory command sequence execution and toggle control (FLSCR1
active state, and MCU consumes the same amount of current as it does during a read.
but a command sequence being executed is not initialized.
If you want to set FLSCR1<FLSMD> to "disable", you must finish all command sequences and verify that
the flash memory is ready to be read.
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