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參數(shù)資料
| 型號： | TH50VSF3582AASB |
| 廠商： | Toshiba Corporation |
| 英文描述： | TOSHIBA MULTI-CHIP INTEGRATED CIRCUIT SILICON GATE CMOS |
| 中文描述： | 東芝多芯片集成電路硅柵CMOS |
| 文件頁數(shù)： | 26/50頁 |
| 文件大小： | 548K |
| 代理商： | TH50VSF3582AASB |
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TH50VSF3582/3583AASB
2001-06-08 26/50
Hidden Rom Area
The TH50VSF3582/3583AASB features a 64-Kbyte Hidden ROM area apart from the memory cells. The area
consists of one block. Data Read, Write, and Protect can be performed on the 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.
Normally, memory cell data are accessed. To access the Hidden ROM area, input a Hidden ROM mode Entry
command. At this time, the device enters Hidden ROM mode, allowing Read, Write, Erase, and Block Protect.
Write and Erase operations are the same as Auto operations except that the device is in Hidden ROM mode. To
protect the Hidden ROM area, use the Block Protect function. Operation of Block Protect here is the same as in
normal Block Protect except that V
IH
rather than V
ID
is input to RESET . Once the block is protected,
protection cannot be released even using a Temporary Block Unprotect function. Use Block Protect carefully.
Note that in Hidden ROM mode, simultaneous operation cannot be performed. Therefore, do not access areas
other than the Hidden ROM area.
To exit Hidden ROM mode, use the Hidden ROM Mode Exit command. The device returns to Read mode.
Hidden Rom Area Address Table
BYTE MODE
WORD MODE
TYPE
BOOT BLOCK
ARCHITECTURE
ADDRESS RANGE
SIZE
ADDRESS RANGE
SIZE
TH50VSF3582AASB
TOP BOOT BLOCK
3F0000H~3FFFFFH
64 Kbytes
1F8000H~1FFFFFH
32 Kwords
TH50VSF3583AASB
BOTTOM BOOT BLOCK
000000H~00FFFFH
64 Kbytes
000000H~007FFFH
32 Kwords
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