tmp88fw45afg TOSHIBA Semiconductor CORPORATION, tmp88fw45afg Datasheet - Page 244

• Manufacturer Part Number: tmp88fw45afg
• Description: 8 Bit Microcontroller Tlcs-870/x Series
• Manufacturer: TOSHIBA Semiconductor CORPORATION

20.2
Command Sequence
20.2.3
20.2.4
20.2.5
20.2.6
Note:The value at address 04002H (flash size) depends on the size of flash memory incorporated in each product.
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.
security program status can be read from the flash memory.
enabled, the flash memory cannot be read and cannot be written in the parallel PROM mode. In the serial PROM
mode, the flash write and RAM loader commands cannot be executed.
or not the security program is enabled can be checked by reading 04F7FH in the Product ID mode. For details,
see Table 20-2.
be executed until this operation is completed. To check the completion of the sequrity program 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 security program 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
This command is used to exit the Product ID mode.
This command enables the read/write protection setting in the flash memory. When the security program is
To disable the security program setting, it is necessary to execute the chip erase command sequence. Whether
It takes a maximum of 40 μs to set security program in the flash memory. The next command sequence cannot
For example, if the product has 16-kbyte flash memory, "03H" is read from address 04002H.
Chip Erase (All Erase)
Product ID Entry
Product ID Exit
Security Program
Table 20-2 Values To Be Read in the Product ID Mode
Cell
1
Address
04000H
04001H
04002H
04F7FH
Security program status
Flash macro ID
Vendor ID
Flash size
Meaning
Page 230
98H
41H
1DH:
0EH:
0BH:
07H:
05H:
03H:
01H:
00H:
FFH:
Other than FFH: Security program enabled
120 kbytes
60 kbytes
48 kbytes
32 kbytes
24 kbytes
16 kbytes
8 kbytes
4 kbytes
Security program disabled
Read Value
TMP88FW45AFG