Western Digital Blue WD20SPZX Technical Reference Manual page 43

WORD FIELD DESCRIPTION
Additional Supported
Bit 15: If set, CFast Specification Sup-
port
Bit 14: If set, Deterministic data in
trimmed LBA range(s) is supported
Bit 13: If set, Long Physical Sector
Alignment Error Reporting Control is
supported
Bit 12: Obsolete
Bit 11: If set, READ BUFFER DMA is
supported
Bit 10: If set, WRITE BUFFER DMA is
supported
Bit 9: Obsolete
69
Bit 8: If set, DOWNLOAD MICRO-
CODE DMA is supported
Bit 7: If set, Reserved for IEEE 1667
Bit 6: If set, Optional ATA device 28-
bit commands supported
Bit 5: If set, Trimmed LBA range(s)
returning zeroed data is supported
Bit 4: If set, Device Encrypts All User
Data
Bit 3: If set, Extended Number of
User Addressable Sectors is sup-
ported
Bit 2: All Write cache in non-volatile
Bit 1-0: Reserved
70 Reserved
Reserved for the Identify Packet
71-74
Device command
Queue Depth
75 Bit 15-5: Reserved
Bit 4-0: Maximum queue depth - 1
Serial ATA Capabilities
Bit 15: If set, support READ LOG DMA
EXT as equivalent to READ LOG EXT
Bit 14: If set, support Device Auto-
matic Partial to Slumber transitions
Bit 13: If set, support Host Automatic
Partial to Slumber transitions
Bit 12: If set, supports NCQ priority
information
Bit 11: If set, supports Unload while
NCQ commands outstanding
Bit 10: If set, supports the SATA Phy
event counters log
76
Bit 9: If set, supports receipt of host-
initiated interface power manage-
ment requests
Bit 8: If set, supports NCQ feature set
Bit 7-4: Reserved of Serial ATA
Bit 3: If set, supports SATA Gen3 Sig-
naling Speed (6GB/s)
Bit 2: If set, supports SATA Gen2 Sig-
naling speed (3Gb/s)
Bit 1: If set, supports SATA Gen1 Sig-
naling speed (1.5Gb/s)
Bit 0: Shall be cleared to zero
WESTERN DIGITAL CONFIDENTIAL
ATA Command Set
F=fixed
V=variable
X= not defined
F
F
F
X
F
F
X
F
F
F
F
F
F
V
F
F
F
F
F
F
F
F
F
F
F
F
F
- 43 -
Drive Program
Power-on Default Value
4D08h
0000h
0000h
001Fh
9F0Eh