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2.5” Solid State Disk
Transcend Information Inc.
V1.09
129-159 0000h X Vendor specific
160-216 0000h Reserved
217 0001h F Nominal media rotation rate
218-254 0000h Reserved
255 0000h
X
Integrity word
15-8 Checksum
7-0 Signature
Key:
F/V = Fixed/variable content
F = the content of the word is fixed and does not change. For removable media devices, these values may change when
media is removed or changed.
V = the contents of the word is variable and may change depending on the state of the device or the commands executed
by the device.
X = the content of the word may be fixed or variable.
IDLE (E3h)
This command causes the device to set BSY, enter the Idle mode, clear BSY and generate an interrupt. If sector count is
non-zero, the automatic power down mode is enabled. If the sector count is zero, the automatic power mode is disabled.
IDLE IMMEDIATE (E1h)
This command causes the device to set BSY, enter the Idle(Read) mode, clear BSY and generate an interrupt.
INITIALIZE DEVICE PARAMETERS (91h)
This command enables the host to set the number of sectors per track and the number of tracks per heads.
READ BUFFER (E4h)
The READ BUFFER command enables the host to read a 512-byte block of data.
READ DMA (C8h)
Read data from sectors during Ultra DMA and Multiword DMA transfer. Use the SET FEATURES command to specify the
mode value. A sector count of zero requests 256 sectors.
READ DMA EXT (25h)
48-bit feature set mandatory command. Read data from sectors during Ultra DMA and Multiword DMA transfer. Use the
SET FEATURES command to specify the mode value. A sector count of zero requests 65536 sectors.
READ FPDMA QUEUED (60h)
NCQ feature set mandatory 48-bit command. This command requests that data to be transferred from the device to the
host.