tmp89fm82t TOSHIBA Semiconductor CORPORATION, tmp89fm82t Datasheet - Page 372

• Manufacturer Part Number: tmp89fm82t
• Description: 8 Bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

21.3
Command Sequence
RA000
21.3.3
21.3.4
21.3.5
21.3.6
ongoing erase operation complete. To check the completion of the erase operation, perform read operations twice
on the same address in the flash memory, and perform polling until the same data is read from the flash memory.
During the erase operation, bit 6 is reversed each time a read is performed.
no matter how the Security program setting. In case of Chip Erase for the protected area where the protect is on,
Flash memory ignore the the write command ( to prevent un intentional writing, like miss operation.) There is
the function to be able to rewrite the data for these area in TMP89FM82T. Refer to "21.2.6 Protect cancel mode
(FLSVPR<VPREG>)" "21.2.7 Protect set up".
ID mode, the vendor ID, flash ID and security status can be read from the flash memory.
status continue after Product ID entry execution. Refer "21.2.7 Protect set up" for detail.
the flash memory overwrite command and the RAM loader command cannot be executed in serial PROM mode.
enabled or disabled, read 0xFF7F in product ID mode. Refer to Table 21-4 for further details. The time needed
to enable or disable the security program is 40 μs maximum. The next command sequence cannot be executed
until the security program setting is completed. To check the completion of the security program setting, perform
read operations twice on the same address in the flash memory, and perform polling until the same data is read.
When the security program setting is being made, bit 6 is reversed each time a read is performed.
This command erases the entire flash memory and cancel Security program.
The time needed to erase all area is maximum 40 ms. The next command sequence cannot be executed until
Data in the erased area is 0xFF.
In case of MCU mode, only Block0 and Block1 is able to write data. Block2 to Block6 is not able to wite data,
This command activates the product ID mode. If an instruction to read the flash memory is executed in Product
The product ID entry operation in MCU mode refrect Security program setting to the write protect status. The
This command is used to exit the Product ID mode.
If the security program is enabled, the flash memory is write and read protected in parallel PROM mode, and
To disable the security program, the chip erase must be performed. To check whether the security program is
Chip erase (all erase)
Product ID entry
Product ID exit
Security program
Table 21-4 Values to Be Read in Product ID Mode
Address
0xFF7F
0xF000
0xF001
Vendor ID
Flash ID
Security status
Meaning
Page 356
0x98
0x4D
0xFF:
Other than 0xFF: Security program enabled
Security program disabled
Read value
TMP89FM82T