tmp19a61f10xbg TOSHIBA Semiconductor CORPORATION, tmp19a61f10xbg Datasheet - Page 504

• Manufacturer Part Number: tmp19a61f10xbg
• Description: 32-bit Tx System Risc Tx19 Family
• Manufacturer: TOSHIBA Semiconductor CORPORATION

22. Flash Memory Operation
Flash Memory
This section describes the hardware configuration and operation of the flash memory.
1) Memory capacity
2) Flash memory access
3) Write/erase time
Rewriting method
The flash memory included in this device is generally compliant with the applicable JEDEC
standards except for some specific functions. Therefore, if the user is currently using an external
flash memory device, it is easy to implement the functions into this device. Furthermore, the
user is not required to build his/her own programs to realize complicated write and erase
functions because such functions are automatically performed using the circuits already built-in
the flash memory chip.
This device is also implemented with a read-protect function to inhibit reading flash memory
data from any external writer device. On the other hand, rewrite protection is available only
through command-based software programming; any hardware setting method to apply
+12VDC is not supported. The above described protection function is automatically enabled
when all the two area are configured for protection. When the user removes protection, the
internal data is automatically erased before the protection is actually removed.
The TMP19A61F10XBG device is equipped with two chips of 4M-bit (512kB) flash memory.
The memory area consists of 8 independent memory blocks (128 kB × 8) to enable
independent write access to each block. When the CPU is to access the internal flash
memory, 32-bit data bus width is used.
Interleave access is used in this device.
Write time: 1sec/Chip (Typ) 0.5sec/128Kbyte (Typ.)
Erase: 0.2sec/Chip (Typ) 100msec/128Kbyte(Typ.)
(Note)
The write time per chip depends on the write method to be used by the user.
Programming method
The onboard programming mode is available for the user to program (rewrite) the device
while it is mounted on the user's board.
Features
The above values are theoretical values not including data transfer time.
4-1) User boot mode
The user's original rewriting method can be supported.
4-2) Single boot mode
The rewriting method to use serial data transfer (Toshiba's unique method) can
be supported.
TMP19A61 (rev1.0) 22-503
TMP19A61