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MFC2000 bảng dữ liệu(PDF) 420 Page - List of Unclassifed Manufacturers

tên linh kiện MFC2000
Giải thích chi tiết về linh kiện  Multifunctional Peripheral Controller 2000
PDF  426 Pages
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nhà sản xuất  ETC [List of Unclassifed Manufacturers]
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MFC2000 bảng dữ liệu(HTML) 420 Page - List of Unclassifed Manufacturers

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MFC2000 Multifunctional Peripheral Controller 2000
Hardware Description
24-34
Conexant
100723A
24.8.2 Firmware Operation
There is only one operation in which firmware need be concerned with the CDRAM block. That operation is the
powerup operation. During startup, DRAM and SDRAM both have a specific sequence which needs to be
performed on them in order for them to function properly. In order to assure that this sequence is properly
performed the following must be done:
1.
Wait a minumum of 200us. Some memories require as little as 100us, while a few others require as great as
500us. Waiting 200us will assure that MOST memories will work correctly.
2.
Write to the CDRAM configuration register. This register should be written to ONCE and ONLY ONCE. Unless
this register is written to, CDRAM will not know what type of RAM is being used.
3.
That’s it. After about a 1 us delay the startup procedure should be finished and the memory ready to be
accessed. An access request can be made after the startup procedure is done and before it is finished, but
the access will not occur until the complete startup procedure is finished.



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