55LD019A-45-I-BWE Ver la hoja de datos (PDF) - Silicon Storage Technology
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55LD019A-45-I-BWE Datasheet PDF : 79 Pages
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ATA Flash Disk Controller
SST55LD019A / SST55LD019B / SST55LD019C
Data Sheet
11.1.2.3 Feature Register (Write Only)
This register provides information regarding features of the ATA Flash Disk Controller that the host can utilize.
11.1.2.4 Sector Count Register
This register contains the numbers of sectors of data requested to be transferred on a Read or Write operation between the
host and the ATA Flash Disk Controller. If the value in this register is zero, a count of 256 sectors is specified. If the command
was successful, this register is zero at command completion. If not successfully completed, the register contains the number
of sectors that need to be transferred in order to complete the request.
11.1.2.5 Sector Number (LBA 7-0) Register
This register contains the starting sector number or bits 7-0 of the Logical Block Address (LBA) for any ATA Flash Disk Con-
troller data access for the subsequent command.
11.1.2.6 Cylinder Low (LBA 15-8) Register
This register contains the low order 8 bits of the starting cylinder address or bits 15-8 of the Logical Block Address.
11.1.2.7 Cylinder High (LBA 23-16) Register
This register contains the high order bits of the starting cylinder address or bits 23-16 of the Logical Block Address.
11.1.2.8 Drive/Head (LBA 27-24) Register
The Drive/Head register is used to select the drive and head. It is also used to select LBA addressing instead of cylinder/
head/sector addressing. The bits are defined as follows:
D7
1
Symbol
LBA
DRV
HS3
HS2
HS1
HS0
D6
D5
D4
D3
D2
D1
D0
Reset Value
LBA
1
DRV
HS3
HS2
HS1
HS0 1010 0000b
Function
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:
LBA7-LBA0: Sector Number register D7-D0.
LBA15-LBA8: Cylinder Low register D7-D0.
LBA23-LBA16: Cylinder High register D7-D0.
LBA27-LBA24: Drive/Head register bits HS3-HS0.
DRV is the drive number. When DRV=0 (Master), Master is selected.
When DRV=1 (Slave), Slave is selected.
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.
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.
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.
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.
©2006 Silicon Storage Technology, Inc.
21
S71241-04-000
12/06
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