Samsung ST320LM008 사용자 설명서
Spinpoint M8U-Internal Product Manual REV 3.4
iii
5.3
S
ERVO
S
YSTEM
................................................................................................................................28
5.4
R
EAD AND
W
RITE
O
PERATIONS
......................................................................................................28
5.4.1
The Read Channel...........................................................................................................28
5.4.2
The Write Channel ..........................................................................................................29
5.5
F
IRMWARE
F
EATURES
.....................................................................................................................29
5.5.1
Read Caching .................................................................................................................29
5.5.2
Write Caching .................................................................................................................30
5.5.3
Defect Management ........................................................................................................31
5.5.4
Automatic Defect Allocation ...........................................................................................31
5.5.5
Multi-burst ECC Correction ...........................................................................................31
CHAPTER 6
USB INTERFACE AND USB COMMANDS ............................................................32
6.1
I
NTRODUCTION
................................................................................................................................32
6.2
P
HYSICAL
I
NTERFACE
.....................................................................................................................32
6.2.1
Mechanical Interface ......................................................................................................33
6.2.1.1
Mechanical Overview ................................................................................................................... 33
6.2.1.2
Connector ...................................................................................................................................... 33
6.2.1.2.1
USB Connector Termination Data..................................................................................34
6.2.1.2.2
Series “A” and Series “B” Receptacles .........................................................................35
6.2.1.2.3
Series “A” and Series “B” Plugs ...................................................................................36
6.2.1.3
Cable...............................................................................................................................37
6.2.1.4
Cable Assembly...............................................................................................................37
6.2.1.4.1
Standard Detachable Cable Assemblies .........................................................................37
6.2.1.4.2
High-/full-speed Captive Cable Assemblies....................................................................38
6.2.1.4.3
Low-speed Captive Cable Assemblies ............................................................................39
6.2.1.4.4
Prohibited Cable Assemblies ..........................................................................................39
6.2.2
Electrical Interface .........................................................................................................40
6.2.2.1
Electrical Overview ........................................................................................................40
6.2.2.2
Signaling .........................................................................................................................41
6.2.2.3
High-speed (480Mb/s) Driver Characteristics ...............................................................42
6.2.2.4
High-speed (480Mb/s) Signaling Rise and Fall Times ...................................................43
6.2.2.5
High-speed (480Mb/s) Receiver Characteristics ............................................................43
6.2.2.6
High-speed (480Mb/s) Signaling Levels .........................................................................44
6.2.3
Power Distribution .........................................................................................................45
6.2.3.1
Overview .........................................................................................................................45
6.2.3.2
Bus-powered Hubs ..........................................................................................................45
6.2.3.3
Self-powered Hubs ..........................................................................................................46
6.3
P
ROTOCOL
L
AYER
...........................................................................................................................47
6.3.1
Protocol Layer Overview................................................................................................47
6.3.2
Common USB Packet Fields ...........................................................................................48
6.3.2.1
SYNC Fields....................................................................................................................48
6.3.2.2
Packet Identifier Fields...................................................................................................48
6.3.2.3
Address Fields ................................................................................................................49
6.3.2.4
Endpoint Fields...............................................................................................................50
6.3.2.5
Frame Number Fields .....................................................................................................50
6.3.2.6
Data Fields .....................................................................................................................50
6.3.2.7
Cyclic Redundancy Checks .............................................................................................50
6.3.3
Packet Format ................................................................................................................51
6.3.3.1
Token Packet...................................................................................................................51
6.3.3.2
Data Packet ....................................................................................................................52
6.3.3.3
Handshake Packet ..........................................................................................................52
6.3.3.4
Start-of-Frame Packets...................................................................................................53
6.3.4
Pipes ...............................................................................................................................53
6.3.5
Transfer/Endpoint Types ................................................................................................54
6.3.5.1
Control Transaction........................................................................................................55
6.3.5.2
Bulk Transaction.............................................................................................................57
6.3.6
USB Device Generic Framework ...................................................................................59
6.3.6.1
USB Device State ............................................................................................................59
6.3.6.1.1
Attatched .........................................................................................................................60