tmp86fp24 TOSHIBA Semiconductor CORPORATION, tmp86fp24 Datasheet - Page 169

• Manufacturer Part Number: tmp86fp24
• Description: 8 Bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

2.17.3
FLASH Write Enable Control (EEPCR<EEPMD>)
(Write protect) in order to prevent a write to the FLASH from occurring by mistake because
of a program error or microcontroller malfunction. To enable a write to the FLASH, set the
EEPCR<EEPMD> with 0011B. To disable a write to the FLASH, set the EEPCR<EEPMD>
with 1100B. A reset initializes the EEPCR<EEPMD> to 1100B to disable a write to the
FLASH. Usually, set the EEPCR<EEPMD> with 1100B, except when it is necessary to
write to the FLASH.
Note 1: The FLASH memory (4000H to FFFFH) can be written only in the serial PROM mode.
Note 2: The EEPCR<EEPMD> can be rewritten only when a program is being executed in the
Note 3: In the masked ROM product, executing a write instruction to the EEPCR<EEPMD>
In the FLASH product, the control register can be used to disable a write to the FLASH
RAM area. Executing a write instruction to the EEPCR<EEPMD> in the FLASH area
does not change its setting.
changes its setting; however, the new setting does not take effect.
86FP24-167
TMP86FP24
2007-08-24