tmp89fh42l TOSHIBA Semiconductor CORPORATION, tmp89fh42l Datasheet - Page 394

• Manufacturer Part Number: tmp89fh42l
• Description: 8 Bit Microcontroller Tlcs-870/c1 Series
• Manufacturer: TOSHIBA Semiconductor CORPORATION

22.12
Security
RA003
22.12.2
22.12.2.1
22.12.2.2
for protection, and a special command is required to make this protection setting. If the security program is
enabled, the reading or writing of flash memory in parallel PROM mode is prohibited. In serial PROM mode,
the read and write of flash memory and other operation commands cannot be used. In performing OCD, two
options about system startup are provided: prohibiting the system startup by using an option code and starting
the system by password authentication.
The security program can be used in parallel and serial PROM modes and for OCD. It has a special memory
to a specially-designed memory. Because protection-related information is written to this specially-designed
memory, no user memory resource are required.
Security program
With the TMP89FH42L, you can control the read of flash memory by writing protection-related information
How the security program functions
Enabling or disabling the security program
・ Enabling the security program
・ Disabling the security program
To enable the security program, execute the flash memory security setting command.
To disable the security program, execute Chip Erase of the flash memory erase command.
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TMP89FH42L