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Fujitsu MHT2030AT Manual/User Guide - Page 187

PIO Data transferring commands from host to device, Number, Cylinder, and Device/Head registers.

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5.4 Command Protocol 5.4.2 PIO Data transferring commands from host to device The execution of the following commands involves Data transfer from the host to the drive. • WRITE SECTOR(S) (EXT) • WRITE LONG • WRITE BUFFER • WRITE VERIFY • SMART WRITE LOG SECTOR • SECURITY DISABLE PASSWORD • SECURITY ERASE UNIT • SECURITY SET PASSWORD • SECURITY UNCLOK The execution of these commands includes the transfer one or more sectors of data from the host to the device. In the WRITE LONG command, 516 bytes are transferred. Following shows the protocol outline. a) The host writes any required parameters to the Features, Sector Count, Sector Number, Cylinder, and Device/Head registers. b) The host writes a command code in the Command register. The drive sets the BSY bit of the Status register. c) When the device is ready to receive the data of the first sector, the device sets DRQ bit and clears BSY bit. d) The host writes one sector of data through the Data register. e) The device clears the DRQ bit and sets the BSY bit. f) When the drive completes transferring the data of the sector, the device clears BSY bit and asserts INTRQ signal. If transfer of another sector is requested, the drive sets the DRQ bit. g) After detecting the INTRQ signal assertion, the host reads the Status register. h) The device resets INTRQ (the interrupt signal). i) If transfer of another sector is requested, steps d) and after are repeated. Figure 5.5 shows an example of WRITE SECTOR(S) command protocol. C141-E192-02EN 5-113

Section	Page
Front Cover	1
FOR SAFE OPERATION	2
Revision History	3
Preface	5
Important Alert Items	9
Manual Organization	11
Contents	13
Illustrations	18
Figures	18
Tables	20
CHAPTER 1 Device Overview	21
1.1 Features	22
1.1.1 Functions and performance	22
1.1.2 Adaptability	22
1.1.3 Interface	23
1.2 Device Specifications	24
1.2.1 Specifications summary	24
1.2.2 Model and product number	25
1.3 Power Requirements	26
1.4 Environmental Specifications	28
1.5 Acoustic Noise	29
1.6 Shock and Vibration	29
1.7 Reliability	30
1.8 Error Rate	31
1.9 Media Defects	31
1.10 Load/Unload Function	31
1.11 Advanced Power Management	32
CHAPTER 2 Device Configuration	35
2.1 Device Configuration	36
2.2 System Configuration	37
2.2.1 ATA interface	37
2.2.2 1 drive connection	37
2.2.3 2 drives connection	38
CHAPTER 3 Installation Conditions	39
3.1 Dimensions	40
3.2 Mounting	41
3.3 Cable Connections	47
3.3.1 Device connector	47
3.3.2 Cable connector specifications	48
3.3.3 Device connection	48
3.3.4 Power supply connector (CN1)	49
3.4 Jumper Settings	49
3.4.1 Location of setting jumpers	49
3.4.2 Factory default setting	50
3.4.3 Master drive-slave drive setting	50
3.4.4 CSEL setting	51
3.4.5 Power Up in Standby setting	52
CHAPTER 4 Theory of Device Operation	53
4.1 Outline	54
4.2 Subassemblies	54
4.2.1 Disk	54
4.2.2 Spindle	54
4.2.3 Actuator	54
4.2.4 Air filter	55
4.3 Circuit Configuration	55
4.4 Power-on Sequence	58
4.5 Self-calibration	59
4.5.1 Self-calibration contents	59
4.5.2 Execution timing of self-calibration	60
4.5.3 Command processing during self-calibration	61
4.6 Read/write Circuit	61
4.6.1 Read/write preamplifier (PreAMP)	61
4.6.2 Write circuit	61
4.6.3 Read circuit	63
4.6.4 Digital PLL circuit	64
4.7 Servo Control	65
4.7.1 Servo control circuit	65
4.7.2 Data-surface servo format	68
4.7.3 Servo frame format	70
4.7.4 Actuator motor control	71
4.7.5 Spindle motor control	72
CHAPTER 5 Interface	75
5.1 Physical Interface	76
5.1.1 Interface signals	76
5.1.2 Signal assignment on the connector	77
5.2 Logical Interface	80
5.2.1 I/O registers	81
5.2.2 Command block registers	82
5.2.3 Control block registers	87
5.3 Host Commands	88
5.3.1 Command code and parameters	88
5.3.2 Command descriptions	92
5.3.3 Error posting	182
5.4 Command Protocol	184
5.4.1 PIO Data transferring commands from device to host	184
5.4.2 PIO Data transferring commands from host to device	187
5.4.3 Commands without data transfer	188
5.4.4 Other commands	190
5.4.5 DMA data transfer commands	190
5.5 Ultra DMA Feature Set	192
5.5.1 Overview	192
5.5.2 Phases of operation	193
5.5.3 Ultra DMA data in commands	193
5.5.4 Ultra DMA data out commands	198
5.5.5 Ultra DMA CRC rules	202
5.5.6 Series termination required for Ultra DMA	203
5.6 Timing	204
5.6.1 PIO data transfer	204
5.6.2 Multiword data transfer	205
5.6.3 Ultra DMA data transfer	206
5.6.4 Power-on and reset	219
CHAPTER 6 Operations	221
6.1 Device Response to the Reset	222
6.1.1 Response to power-on	222
6.1.2 Response to hardware reset	223
6.1.3 Response to software reset	225
6.1.4 Response to diagnostic command	226
6.2 Power Save	227
6.2.1 Power save mode	227
6.2.2 Power commands	229
6.3 Defect Processing	229
6.3.1 Spare area	229
6.3.2 Alternating processing for defective sectors	230
6.4 Read-ahead Cache	232
6.4.1 DATA buffer structure	232
6.4.2 Caching operation	233
6.4.3 Using the read segment buffer	235
6.5 Write Cache	239
6.5.1 Cache operation	239
Glossary	243
Acronyms and Abbreviations	247
Index	249
Comment Form	251