HANBit
HFDOM40K3R
Cyl High(5)
X
Cyl Low(4)
Sec Num(3)
Sec Cnt(2)
Feature(1)
X
X
Number of Sectors
X
Initialize Drive Parameters
This command enables the host to set the number of sectors per track and the number of heads per cylinder. Only
the Sector Count and the Card/Drive/Head registers are used by this command.
Read Buffer – E4h
Bit->
7
6
5
4
3
2
1
0
Command(7)
C/D/H(6)
E4h
X
Drive
X
Cyl High(5)
Cyl Low(4)
Sec Num(3)
Sec Cnt(2)
Feature(1)
X
X
X
X
X
Read Buffer
The Read Buffer command enables the host to read the current contents of the CompactFlash
Storage Card’s sector buffer. This command has the same protocol as the Read Sector(s) command.
Read Multiple – C4h
Bit->
7
6
5
4
3
2
1
0
Command(7)
C/D/H(6)
C4h
1
LBA
1
Drive
Head(LBA 27 – 24)
Cyl High(5)
Cyl Low(4)
Sec Num(3)
Sec Cnt(2)
Feature(1)
Cylinder High (LBA 23 – 16)
Cylinder Low (15 – 8)
Sector Number (LBA 7 – 0)
Sector Count
X
Read Multiple
The Read Multiple command performs similarly to the Read Sectors command. Interrupts are not generated on
every sector, but on the transfer of a block which contains the number of sectors defined by a Set Multiple
command.
Command execution is identical to the Read Sectors operation except that the number of sectors defined by a Set
Multiple command are transferred without intervening interrupts. DRQ
qualification of the transfer is required only at the start of the data block, not on each sector.
The block count of sectors to be transferred without intervening interrupts is programmed by the Set Multiple Mode
command, which must be executed prior to the Read Multiple command.
When the Read Multiple command is issued, the Sector Count Register contains the number of sectors (not the
number of blocks or the block count) requested. If the number of requested
sectors is not evenly divisible by the block count, as many full blocks as possible are transferred, followed by a final,
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HANBit Electronics Co., Ltd.
Rev. 2.0 (October. 2004)
HANBIT [ HANBIT ELECTRONICS CO.,LTD ]
