Interface
5.4 Command Protocol
The host should confirm that the BSY bit of the Shadow Block Status register of
the device is 0 prior to issue a command. If BSY bit is 1, the host should wait for
issuing a command until BSY bit is cleared to 0.
Commands can be executed only when the DRDY bit of the Status register is 1.
However, the following commands can be executed even if DRDY bit is 0.
•
EXECUTE DEVICE DIAGNOSTIC
•
INITIALIZE DEVICE PARAMETERS
Note: Each FIS type is referred to as follows in this section.
FIS (Frame Information Structure) type
Abbreviation
Register - Device to Host
RegDH
DMA Active - Device to Host
DMA Active
DMA Setup - Device to Host or Host to Device
(Bidirectional)
DMA Setup
Set Device Bits - Device to Host
SetDB
BIST Active - Bidirectional
BIST Active
PIO Setup - Device to Host
PIO Setup
Data - Host to Device or Device to Host (Bidirectional)
DATA
Register - Host to Device
RegHD
5-174
C141-E259
Summary of Contents for MHW2080BJ
Page 1: ...C141 E259 01EN MHW2160BJ MHW2120BJ MHW2080BJ DISK DRIVES PRODUCT MAINTENANCE MANUAL ...
Page 4: ...This page is intentionally left blank ...
Page 12: ...This page is intentionally left blank ...
Page 19: ...Contents Glossary GL 1 Acronyms and Abbreviations AB 1 Index IN 1 C141 E259 xv ...
Page 24: ...This page is intentionally left blank ...
Page 44: ...This page is intentionally left blank ...
Page 56: ...This page is intentionally left blank ...
Page 76: ...This page is intentionally left blank ...
Page 264: ...This page is intentionally left blank ...
Page 286: ...This page is intentionally left blank ...
Page 302: ...This page is intentionally left blank ...
Page 306: ...This page is intentionally left blank ...
Page 308: ...This page is intentionally left blank ...
Page 316: ...This page is intentionally left blank ...
Page 318: ......
Page 319: ......
Page 320: ......