tmp19a44fda TOSHIBA Semiconductor CORPORATION, tmp19a44fda Datasheet - Page 614

• Manufacturer Part Number: tmp19a44fda
• Description: 32bit Tx System Risc
• Manufacturer: TOSHIBA Semiconductor CORPORATION

0xBFCF_FFFF
Flash Memory Operation
(1) Block configuration
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24.3 On-board Programming of Flash Memory (Rewrite/Erase)
Automatic page program
Automatic chip erase
Automatic block erase
Write protect
Protect function
In on-board programming, the CPU is to execute software commands for rewriting or erasing the flash memory.
The rewrite/erase control program should be prepared by the user beforehand. Because the flash memory
content cannot be read while it is being written or erased, it is necessary to run the rewrite/erase program from
the internal RAM or from an external memory device after shifting to the user boot mode. In this section, flash
memory addresses are represented in virtual addresses unless otherwise noted.
Major functions
24.3.1
Except for some functions, writing and erasing flash memory data are in accordance with the standard
JEDEC commands. In writing or erasing, use the SW command of the CPU to enter commands to the
flash memory. Once the command is entered, the actual write or erase operation is automatically
performed internally.
Note that addressing of operation commands is different from the case of standard commands due to the
specific interface arrangements with the CPU. Also note that the flash memory is written in 32-bit
blocks. So, 32-bit (word) data transfer commands must be used in writing the flash memory.
0xBFC0_0000
0xBFCB_FFFF
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Flash Memory
0xBFC7_FFFF
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Fig. 24.9 Block Configuration of Flash Memory
Writes data automatically.
Erases the entire area of the flash memory automatically.
Erases a selected block automatically.
The write or erase function can be individually inhibited for each block.
When all blocks are set for protection, the entire protection function is
automatically enabled.
By writing a 4-bit protection code, the write or erase function can be individually
inhibited for each area.
Table 24.9 Flash Memory Functions
TMP19A44 (rev1.3)24-29
128 K バイト
128 K バイト
128 K バイト
128 K バイト
128 K バイト
128 K バイト
128 K バイト
32 K バイト
32 K バイト
64 K バイト
Description
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TMP19A44
2010-04-01