參數(shù)資料
型號(hào)： ML54051
廠商： LAPIS SEMICONDUCTOR CO LTD
元件分類： 存儲(chǔ)控制器/管理單元
英文描述： FLASH MEMORY DRIVE CONTROLLER, PQFP120
封裝： 14 X 14 MM, 0.40 MM PITCH, PLASTIC, TQFP-120
文件頁數(shù)： 6/37頁
文件大?。?/td> 304K
代理商： ML54051
Semiconductor
ML54051
10/33
5.1.2
Data Format Within Port
Each chip is partitioned into a user area to store user data, a spare area to transfer data in defective
sectors, and a substitute management information area to keep sector transfer information. The
port views this configuration as a single chip.
Substitute processing is performed in block units, not in sector units. If the process is performed
in sector units, a single block will have data from various addresses at random, which delays the
substitute processing.
A substitute management information is made per port; while a copy of substitute management
information is reserved as a back-up.
User Area
Chip 1
Port A
Spare Area
Substitute Management
Information Area
User Area
Chip 3
Spare Area
User Area
Chip n – 1
Spare Area
User Area
Chip 2
Port B
Spare Area
Substitute Management
Information Area
User Area
Chip 4
Spare Area
User Area
Chip n
Spare Area
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