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Interface
5-104 C141-E218
(36) SET MAX (X’F9’)
SET MAX features register values
Value Command
00h Obsolete
01h SET MAX SET PASSWORD
02h SET MAX LOCK
03h SET MAX UNLOCK
04h SET MAX FREEZE LOCK
05h - FFh Reserved
• SET MAX ADDRESS
A successful READ NATIVE MAX ADDRESS command shall immediately
precede a SET MAX ADDRESS command.
This command allows the maximum address accessible by the user to be set in
LBA or CHS mode. Upon receipt of the command, the device sets the BSY bit
and saves the maximum address specified in the DH, CH, CL and SN registers.
Then, it clears BSY and generates an interrupt.
The new address information set by this command is reflected in Words 1, 54, 57,
58, 60 and 61 of IDENTIFY DEVICE information. If an attempt is made to
perform a read or write operation for an address beyond the new address space, an
ID Not Found error will result.
When SC register bit 0, VV (Value Volatile), is 1, the value set by this command
is held even after power on and the occurrence of a hard reset. When the VV bit is
0, the value set by this command becomes invalid when the power is turned on or
a hard reset occurs, and the maximum address returns to the value most lately set
when VV bit = 1. (The value by VV bit = 0 is held in case that this command
with VV bit = 1 has not been issued or had set the default value, and hard reset
occurs.)
After power on and the occurrence of a hard reset, the host can issue this
command only once when VV bit = 1. If this command with VV bit = 1 is issued
twice or more, any command following the first time will result in an Aborted
Command error.
When the SET MAX ADDRESS EXT command is executed, all SET MAX
ADRESS commands are aborted. The address value returns to the origin when the
SET MAX ADDRESS EXT command is executed using the address value
returned by the READ NATIVE MAX ADDRESS command.
- C141-E218-01EN 1
- FOR SAFE OPERATION 2
- Revision History 3
- Preface 5
- Operating Environment 6
- Conventions 6
- Attention 7
- Liability Exception 7
- Important Alert Items 9
- Manual Organization 11
- Contents 13
- Illustrations 20
- CHAPTER 1 Device Overview 25
- 1.1 Features 26
- 1.1.3 Interface 27
- 1.2 Device Specifications 28
- 1.3 Power Requirements 30
- 1.5 Acoustic Noise 33
- 1.6 Shock and Vibration 33
- 1.7 Reliability 34
- 1.8 Error Rate 35
- 1.9 Media Defects 35
- 1.10 Load/Unload Function 35
- 2.1 Device Configuration 40
- 2.2 System Configuration 41
- 2.2.3 2 drives connection 42
- 3.1 Dimensions 44
- 3.2 Mounting 45
- 3.3 Cable Connections 51
- 3.3.3 Device connection 52
- 3.4 Jumper Settings 53
- 3.4.4 CSEL setting 55
- 4.1 Outline 58
- 4.2 Subassemblies 58
- 4.3 Circuit Configuration 59
- MCU & HDC & RDC 60
- 3.3V 1.2V 60
- C141-E218 4-5 61
- 4.4 Power-on Sequence 62
- 4.5 Self-calibration 63
- 4.6 Read/write Circuit 65
- 4.6.3 Read circuit 66
- 4.6.4 Digital PLL circuit 67
- 4.7 Servo Control 68
- 4.7.3 Servo frame format 73
- 4.7.5 Spindle motor control 75
- CHAPTER 5 Interface 77
- 5.1 Physical Interface 78
- 5.2 Logical Interface 82
- 5.2.1 I/O registers 83
- 5.3 Host Commands 90
- 5.3.2 Command descriptions 94
- • Default function 110
- • Attribute ID 123
- • Status Flag 124
- • Current attribute value 124
- • Raw attribute value 124
- • Error logging capability 127
- • Check sum 127
- • SMART error logging 128
- • Command data structure 130
- • Error data structure 130
- • Status 130
- • SMART self-test 131
- • Self-test number 131
- • Self-test index 131
- Initial 132
- • Feature flags 133
- (CM) 1 1 1 0 0 1 0 0 149
- • SET MAX ADDRESS 180
- Password information 182
- • SET MAX SET PASSWORD 184
- • SET MAX LOCK 184
- • SET MAX UNLOCK 184
- • Description 186
- Sector offset (7-0) 190
- 5.3.3 Error posting 203
- Interface 204
- 5-128 C141-E218 204
- 5.4 Command Protocol 205
- 5.4.4 Other commands 211
- 5.5 Ultra DMA Feature Set 213
- 5.5.2 Phases of operation 214
- 5.5.5 Ultra DMA CRC rules 223
- 5.6 Timing 225
- DIOR-/DIOW 226
- HSTROBE 239
- (host) 239
- DA0, DA1, DA2 239
- CS0-, CS1 239
- 5.6.4 Power-on and reset 240
- CHAPTER 6 Operations 241
- 6.1.1 Response to power-on 242
- 6.2 Power Save 247
- 6.3 Defect Processing 249
- Sector (physical) 250
- Cylinder 0 250
- (Not used) 250
- 6.4 Read-ahead Cache 252
- 6.4.2 Caching operation 253
- 256
- 6.5 Write Cache 259
- Glossary 263
- Acronyms and Abbreviations 267
- Comment Form 275
- C141-E218-01EN 277
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