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SST58SM008-70-C-FRJ Datasheet(PDF) 16 Page - Silicon Storage Technology, Inc |
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SST58SM008-70-C-FRJ Datasheet(HTML) 16 Page - Silicon Storage Technology, Inc |
16 / 40 page 16 Advance Information ATA-Disk Module SST58SM008 / 016 / 024 / 032 / 048 / 064 / 096 / 128 / 192 SST58LM008 / 016 / 024 / 032 / 048 / 064 / 096 / 128 / 192 ©2001 Silicon Storage Technology, Inc. S71193-01-000 9/01 519 3.1.2.3 Feature Register (Write Only) This register provides information regarding features of the ADM that the host can utilize. 3.1.2.4 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 ADM. If the value in this register is zero, a count of 256 sectors is specified. If the com- mand was successful, this register is zero at command completion. If not successfully completed, the register con- tains the number of sectors that need to be transferred in order to complete the request. 3.1.2.5 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 ADM data access for the subsequent command. 3.1.2.6 Cylinder Low (LBA 15-8) Register This register contains the low order 8 bits of the starting cylinder address or bits 15-8 of then Logical Block Address. 3.1.2.7 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. 3.1.2.8 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: 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: 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. Bit 5 This bit is set to 1. Bit 4 (DRV) DRV is the drive number. When DRV=0 (Master), Master is selected. When DRV=1(Slave), Slave is selected. 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. D7 D6 D5 D4 D3 D2 D1 D0 1LBA 1 DRV HS3 HS2 HS1 HS0 |
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