tmp88f846ug TOSHIBA Semiconductor CORPORATION, tmp88f846ug Datasheet - Page 225

• Manufacturer Part Number: tmp88f846ug
• Description: 8 Bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

19.13Specifying the Erasure Area
Erasure Area Specification Data (n−2 byte data)
specified by ERAREA.
ERAREA. At the same time, the read protection for flash memory is also disabled.
Executing the sector erase while the read protection is enabled results in an infinite loop.
( ROMCHK_higher)
In the flash memory erasing mode, the erasure area of the flash memory is specified by n−2 byte data.
The address of an erasure area is specified by ERAREA.
The sector erase (flash memory erasing every 4K bytes) is performed if the address data from "00H" to "01H" is
The chip erase (all flash memory erasing) is performed if the address data from "C0H" to "FFH" is specified by
Therefore, make sure to execute the chip erase (not sector erase) to disable the read protectionto for flash memory.
Note 1: When the sector erase is executed for the area containing no flash cell, TMP88F846UG stops the UART com-
Note 2: Executing the sector erase while the read protection is enabled results in an infinite loop.
muni cation and enters the halt condition.
0xFFFFF
0 04FFF
0x05EFF
0xFFF00
0 04000
0 05000
7
ERAREA
6
Select the erase area
Sector 0
Sector 1
Sector 1
5
4
ERASTA
Sector 0 is erased only on
ERAREA = "00H".
Sector 1 is erased only on
ERAREA = "01H".
00H:
01H:
C0H:
FFH:
:
:
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3
Sector 0 erase
Sector 1 erase
Chip erase
Chip erase
2
1
All memory (All sector) are erased on
ERAREA = "C0H" to "FFH".
0
TMP88F846UG