Western Digital Blue WD20SPZX Technical Reference Manual page 42

WORD FIELD DESCRIPTION
Obsolete
Word 54: Number of current logical
cylinders
Word 55: Number of current logical
54-58
heads
Word 56: Number of current logical
sectors per track
Word 57-58: Current capacity in sec-
tors)
Current Blocking Factor
Bit 15: If set, The BLOCK ERASE EXT
command is supported
Bit 14: If set, The OVERWRITE EXT
command is supported
Bit 13: If set, The CRYPTO Scramble
EXT command is supported
Bit 12: If set, The Sanitize feature set
is supported
Bit 11: 1 = The commands allowed
during a sanitize operation are as
specified by this standard
59
0 = The commands allowed
during a sanitize operation are as
specified by ACS-2
Bit 10: The SANITIZE ANTIFREEZE
LOCK EXT command is supported
Bit 9: Reserved
Bit 8: If set, Multiple local sector
setting is valid
Bit 7-0: Current setting for number
of logical sectors that shall be trans-
ferred per DRQ data block on READ/
WRITE Multiple commands
Total number of user addressable
60-61 logical sectors for 28 bit commands
(DWord)
62 Obsolete
Multi-Word DMA Transfer Mode Sup-
ported
Bit 15-11: Reserved
Bit 10: If set, Multiword DMA mode 2
is selected
Bit 9: If set, Multiword DMA mode 1 is
selected
63 Bit 8: If set, Multiword DMA mode 0 is
selected
Bit 7-3: Reserved
Bit 2: If set, Multiword DMA mode 2
Bit 1: If set, Multiword DMA mode 1
Bit 0: If set, Multiword DMA mode 0
Advanced PIO Modes Supported
Bit 15-2: Reserved
64
Bits 1-0: PIO modes 3 and 4 sup-
ported
Minimum Multi-Word DMA Transfer
65
Cycle Time
Manufacturer Recommended Multi-
66
word DMA Cycle Time
Minimum PIO Transfer Cycle Time
67
without flow control
Minimum PIO Transfer Cycle Time
68
with IORDY flow control
WESTERN DIGITAL CONFIDENTIAL
ATA Command Set
F=fixed
V=variable
X= not defined
- 42 -
Drive Program
Power-on Default Value
X 3FFF0010003FFC1000FBh
F
F
F
F
0110h
F
F
V
V
F FFFF0FFFh
X 0000h
V
V
0107h
V
F
F
F
0003h
F
F 0078h
F 0078h
F 0078h
F 0078h