Fujitsu MHV2040BH Product Manual page 18

Contents
5.4.5
5.4.6
5.5 Power-on and COMRESET.......................................................................... 5-156
CHAPTER 6 Operations ................................................................................. 6-1
6.1 Reset and Diagnosis.......................................................................................... 6-2
6.1.1
6.1.2
6.1.2.1 Software settings preservation................................................... 6-5
6.1.2.2 COMRESET preservation requirements ................................... 6-5
6.1.3
6.2 Power Save ....................................................................................................... 6-8
6.2.1
6.2.2
6.3 Power Save Controlled by Interface Power Management (IPM)................... 6-11
6.3.1
6.4 Read-ahead Cache .......................................................................................... 6-13
6.4.1
6.4.2
6.4.3
6.4.3.1 Miss-hit.................................................................................... 6-16
6.4.3.2 Sequential hit ........................................................................... 6-17
6.4.3.3 Full hit...................................................................................... 6-17
6.4.3.4 Partial hit ................................................................................. 6-19
6.5 Write Cache .................................................................................................... 6-20
6.5.1
xiv
DMA data-out command protocol ................................................... 5-152
Native Command Queuing protocol ................................................ 5-153
Response to power-on .......................................................................... 6-2
Response to COMRESET .................................................................... 6-4
Response to a software reset ................................................................ 6-7
Power save mode.................................................................................. 6-8
Power commands ............................................................................... 6-10
Power save mode of the interface ...................................................... 6-11
Data buffer structure........................................................................... 6-13
Caching operation............................................................................... 6-14
Using the read segment buffer ........................................................... 6-16
Cache operation.................................................................................. 6-20
C141-E224