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TC58FVT641 データシート(PDF) 13 Page - Toshiba Semiconductor

部品番号 TC58FVT641
部品情報  64-MBIT (8M 횞 8 BITS / 4M 횞 16 BITS) CMOS FLASH MEMORY
PDF  53 Pages
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メーカー  TOSHIBA [Toshiba Semiconductor]
ホームページ  http://www.semicon.toshiba.co.jp/eng
Logo TOSHIBA - Toshiba Semiconductor

TC58FVT641 データシート(HTML) 13 Page - Toshiba Semiconductor

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TC58FVT641/B641FT/XB-70,-10
2001-09-06
13/53
Hidden ROM Area
The TC58FVT641/B641 features a 64-Kbyte hidden ROM area which is separate from the memory cells. The
area consists of one block. Data Read, Write and Protect can be performed on this block. Because Protect cannot
be released, once the block is protected, data in the block cannot be overwritten.
The hidden ROM area is located in the address space indicated in the HIDDEN ROM AREA ADDRESS
TABLE. To access the Hidden ROM area, input a Hidden ROM Mode Entry command. The device now enters
Hidden ROM Mode, allowing Read, Write, Erase and Block Protect to be executed. Write and Erase operations
are the same as auto operations except that the device is in Hidden ROM Mode. However, regarding write
operation, Accelaration mode can not be performed during Hidden ROM Mode. To protect the hidden ROM area,
use the block protection function. The operation of Block Protect here is the same as a normal Block Protect
except that VIH rather than VID is input to RESET . Once the block has been protected, protection cannot be
released, even using the temporary block unprotection function. Use Block Protect carefully. Note that in
Hidden ROM Mode, simultaneous operation cannot be performed. Therefore, do not attempt to access areas
other than the hidden ROM area.
To exit Hidden ROM Mode, use the Hidden ROM Mode Exit command. This will return the device to Read
Mode.
HIDDEN ROM AREA ADDRESS TABLE
BYTE MODE
WORD MODE
TYPE
BOOT BLOCK
ARCHITECTURE
ADDRESS RANGE
SIZE
ADDRESS RANGE
SIZE
TC58FVT641
TOP BOOT BLOCK
7F0000H~7FFFFFH
64 Kbytes
3F8000H~3FFFFFH
32 Kwords
TC58FVB641
BOTTOM BOOT BLOCK
000000H~00FFFFH
64 Kbytes
000000H~007FFFH
32 Kwords



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