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5.3 Host Commands
C141-E239 5-29
5.3 Host Commands
The host system issues a command to the device by writing necessary parameters
in related fileds in the shadow block registers and writing a command code in the
Command field of the shadow block registers.
The device can accept the command when the BSY bit is 0 (the device is not in
the busy status).
The host system can halt the uncompleted command execution only at execution
of COMRESET or software reset.
When the BSY bit is 1 or the DRQ bit is 1 (the device is requesting the PIO data
transfer) and the host system writes to the command field of the shadow block
register, the correct device operation is not guaranteed.
5.3.1 Command code and parameters
Table 5.6 lists the supported commands, command code and the related fields to
be written necessary parameters at command execution.
Table 5.6 Command code and parameters (1/3)
COMMAND CODE (Bit) PARAMETER USED
COMMAND NAME
7 6 5 4 3 2 1 0 FR SC SN CY DH
RECALIBRATE 0 0 0 1 X X X X N N N N D
READ SECTOR(S) 0 0 1 0 0 0 0 R N Y Y Y Y
WRITE SECTOR(S) 0 0 1 1 0 0 0 R N Y Y Y Y
WRITE VERIFY 0 0 1 1 1 1 0 0 N Y Y Y Y
READ VERIFY SECTOR(S) 0 1 0 0 0 0 0 R N Y Y Y Y
SEEK 0 1 1 1 X X X X N N Y Y Y
EXECUTE DEVICE DIAGNOSTIC 1 0 0 1 0 0 0 0 N N N N N
INITIALIZE DEVICE PARAMETERS 1 0 0 1 0 0 0 1 N Y N N Y
DOWNLOAD MICROCODE 1 0 0 1 0 0 1 0 Y Y Y N D
STANDBY IMMEDIATE
1
1
0
1
0
1
1
0
0
0
1
0
0
0
0
0
N N N N D
IDLE IMMEDIATE
1
1
0
1
0
1
1
0
0
0
1
0
0
0
1
1
Y N Y Y D
UNLOAD IMMEDIATE
1
1
0
1
0
1
1
0
0
0
1
0
0
0
1
1
Y N Y Y D
STANDBY
1
1
0
1
0
1
1
0
0
0
1
0
1
1
0
0
N Y N N D
- MHV2160BT 1
- DISK DRIVE 1
- PRODUCT MANUAL 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
- Contents 19
- C141-E239 xv 19
- 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 34
- 1.6 Shock and Vibration 34
- 1.7 Reliability 35
- 1.8 Error Rate 36
- 1.9 Media Defects 36
- 1.10 Load/Unload Function 36
- 2.1 Device Configuration 42
- 2.2 System Configuration 43
- This page is intentionally 44
- blank 44
- 3.1 Dimensions 46
- 3.2 Mounting 47
- 3.2 Mounting 49
- Installation Conditions 50
- (4) Ambient temperature 50
- General notes 52
- Installation 52
- Recommended equipments 52
- 4.1 Outline 58
- 4.2 Subassemblies 58
- 4.3 Circuit Configuration 59
- C141-E239 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
- COMRESET/COMINIT 80
- 106.7 ns 80
- 106.7 ns 106.7 ns 80
- 20-80TX 84
- 5.1.4 Connector pinouts 86
- 5.1.5 P11 function 87
- 5-12 C141-E239 88
- 5.1.6 Hot Plug 89
- Host located layers 90
- Device located layers 90
- 5.2.1 Communication layers 91
- 5.3 Host Commands 105
- Interface 106
- 5-30 C141-E239 106
- 5.3.2 Command descriptions 108
- 5-88 C141-E239 164
- Word Value Content 164
- 5.3 Host Commands 165
- C141-E239 5-89 165
- Bit 0: Reserved 187
- Setup FIS 188
- 01h (*1) 198
- • WRITE MULTIPLE FUA EXT 207
- • WRITE DMA FUA EXT 207
- • READ FP DMA QUEUED 207
- • WRITE FP DMA QUEUED 207
- Status information 212
- Password information 213
- Sector offset (7-0) 222
- 5.3.3 Error posting 242
- 5.4 Command Protocol 244
- • READ DMA (EXT) 249
- • IDENTFY DEVICE 249
- • IDENTFY DEVICE DMA 249
- DMA Active 250
- 5.4 Command Protocol 253
- C141-E239 5-177 253
- 5.5 Power-on and COMRESET 254
- C141-E239 5-179 255
- CHAPTER 6 Operations 257
- 6.1 Reset and Diagnosis 258
- 6.1 Reset and Diagnosis 259
- C141-E239 6-3 259
- earlier than the host) 259
- 6.1.2 Response to COMRESET 260
- • Security mode state 261
- • SECURITY FREEZE LOCK 261
- • SECURITY UNLOCK 261
- 6.2 Power Save 264
- 6.2.2 Power commands 266
- 6.4 Read-ahead Cache 269
- 6.4.2 Caching operation 270
- 273
- 6.5 Write Cache 276
- IMPORTANT 277
- Glossary 279
- Acronyms and Abbreviations 283
- Comment Form 291
- C141-E239-01EN 293
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