參數(shù)資料
型號(hào): DRM064
英文描述: Single Phase On-Line UPS Using MC9S12E128
中文描述: 單相在線(xiàn)式UPS使用MC9S12E128
文件頁(yè)數(shù): 19/26頁(yè)
文件大?。?/td> 485K
代理商: DRM064
Logical to Physical Table
USB Thumb Drive Designer Reference Manual, Rev. 0
Freescale Semiconductor
19
4.7 Logical to Physical Table
Figure 4-7. Logical to Physical Address Translation Table
Figure 4-7
shows the logical to physical translation table. It reads the ExtraDataArea of physical block of
the NAND Flash to retrieve the logical address and store to the table. For high speed processing, it is
desirable to construct a table of alternate blocks, as well as the logical/physical translation table. In this
firmware, the RAM block 0 is to store the conversion table for the physical segment 0 of the NAND Flash,
which is to store boot record, FAT table and directories content. The RAM block 1 is to store the
conversion tables for the physical segment 1 to 3 of the NAND Flash for the file data content.
4.8 SCSI Command Handling Flow
Figure 4-8. SCSI Command Handling Flow
PBA no.
PBA no.
PBA no.
PBA no.
PBA no.
0
1
2
3
999
10-bit
Logical
Block Address
(LBA)
USB_MS
RETURN PASSED, FAILED,
OR PHASE ERROR
HOST SENDS OUT CBW
OUT
DATAx
31 BYTE CBW
Need to call
device driver
SmartMedia
SM_SCSICommand()
SCSI COMMAND HANDLING
N
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