tmp88f846ug TOSHIBA Semiconductor CORPORATION, tmp88f846ug Datasheet - Page 194

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

18.2 Command Sequence
18. Flash Memory
18.2.3 Chip Erase (All Erase)
18.2.4 Product ID Entry
18.2.5 Product ID Exit
18.2.6 Read Protect
Note: The value at address 04002H (flash size) depends on the size of flash memory incorporated in each product. For example,
be executed until the erase operation is completed. To check the completion of the erase operation, perform
read operations repeatedly for data polling until the same data is read twice from the same address in the flash
memory. During the erase operation, any consecutive attempts to read from the same address is reversed bit 6
of the data (toggling between 0 and 1). After the chip is erased, all bytes contain FFH.
read protection status can be read from the flash memory.
the flash memory cannot be read in the parallel PROM mode. In the serial PROM mode, the flash write and
RAM loader commands cannot be executed.
or not the read protection is enabled can be checked by reading 04F7FH in the Product ID mode. For details,
see Table 18-2.
be executed until this operation is completed. To check the completion of the read protect operation, perform
read operations repeatedly for data polling until the same data is read twice from the same address in the flash
memory. During the read protect operation, any attempts to read from the same address is reversed bit 6 of the
data (toggling between 0 and 1).
This command erases the entire flash memory in approximately 30 ms. The next command sequence cannot
This command activates the Product ID mode. In the Product ID mode, the vendor ID, the flash ID, and the
if the product has 16-kbyte flash memory, "03H" is read from address 04002H.
This command is used to exit the Product ID mode.
This command enables the read protection setting in the flash memory. When the read protection is enabled,
To disable the read protection setting, it is necessary to execute the chip erase command sequence. Whether
It takes a maximum of 40 µs to set read protection in the flash memory. The next command sequence cannot
Table 18-2 Values To Be Read in the Product ID Mode
Cell
1
Address
04F7FH
04000H
04001H
04002H
Read protection status
Flash macro ID
Vendor ID
Flash size
Meaning
Page 184
98H
41H
0EH:
0BH:
07H:
05H:
03H:
01H:
00H:
FFH:
Other than FFH: Read protection enabled
60 kbytes
48 kbytes
32 kbytes
24 kbytes
16 kbytes
8 kbytes
4 kbytes
Read protection disabled
Read Value
TMP88F846UG