參數(shù)資料
型號(hào): SDCFBI-30-101
廠商: SANDISK CORP
元件分類: 存儲(chǔ)控制器/管理單元
英文描述: FLASH MEMORY DRIVE CONTROLLER, XMA50
封裝: PC CARD-50
文件頁(yè)數(shù): 76/124頁(yè)
文件大小: 769K
代理商: SDCFBI-30-101
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CompactFlash Memory Card Product Manual
SanDisk CompactFlash Memory Card Product Manual 1999 SANDISK CORPORATION
55
5.5.8
Drive/Head (LBA 27-24) Register
(Address 1F6[176]; Offset 6)
The Drive/Head register is used to select t h e
drive and head. It is also used to select LBA
addressing
instead
of
cylinder/head/sector
addressing. The bits are defined as follows:
D7
D6
D5
D4
D3
D2
D1
D0
1
LBA
1
DRV
HS3
HS2
HS1
HS0
Bit 7
This bit is set to 1.
Bit 6
LBA is a flag to select either Cylinder/Head/Sector (CHS) or Logical Block Address Mode (LBA).
When LBA=0, Cylinder/Head/Sector mode is selected. When LBA=1, Logical Block Address is
selected. In Logical Block Mode, the Logical Block Address is interpreted as follows:
LBA07-LBA00: Sector Number Register D7-D0.
LBA15-LBA08: Cylinder Low Register D7-D0.
LBA23-LBA16: Cylinder High Register D7-D0.
LBA27-LBA24: Drive/Head Register bits HS3-HS0.
Bit 5
This bit is set to 1.
Bit 4 (DRV)
This bit will have the following meaning. DRV is the drive number. When DRV=0, drive (card) 0 is
selected When DRV=1, drive (card) 1 is selected. The CompactFlash Card is set to be Card 0 or 1
using the copy field of the PCMCIA Socket & Copy configuration register.
Bit 3 (HS3)
When operating in the Cylinder , Head, Sector mode, this is bit 3 of the head number. It is Bit 27 in
the Logical Block Address mode.
Bit 2 (HS2)
When operating in the Cylinder, Head, Sector mode, this is bit 2 of the head number. It is Bit 26 in
the Logical Block Address mode.
Bit 1 (HS1)
When operating in the Cylinder, Head, Sector mode, this is bit 1 of the head number. It is Bit 25 in
the Logical Block Address mode.
Bit 0 (HS0)
When operating in the Cylinder, Head, Sector mode, this is bit 0 of the head number. It is Bit 24 in
the Logical Block Address mode.
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