Interface
FIS Type -
Set to a value of 5Fh. Defines the rest of the FIS fields.
Defines the length of the FIS as five Dwords.
Cyl Low -
Holds the contents of the cylinder low register of the
Command Block.
Cyl Low (exp) -
Contains the contents of the expanded address field of the
Shadow Register Block.
Cyl High -
Holds the contents of the cylinder high register of the
Command Block.
Cyl High (exp) -
Contains the contents of the expanded address field of the
Shadow Register Block.
D -
Indicates whether host memory is being written or read by
the device.
1 = write (device to host), 0 = read (host to device).
Dev / Head -
Holds the contents of the device / head register of the
Command Block.
Dev / Head (exp) - Contains the contents of the expanded address field of the
Shadow Register Block.
E_Status -
Contains the new value of the status register of the task file
block for correct synchronization of data transfers to host.
Error -
Contains the new value of the Error register of the Command
Block at the conclusion of all subsequent Data to Device
frames.
I -
Interrupt bit. This bit reflects the interrupt bit line of the device.
R -
Reserved (0)
Sector Count -
Holds the contents of the sector count register of the
Command Block.
Sector Count (exp) - Contains the contents of the expanded address field of the
Shadow Register Block.
Sector Number -
Holds the contents of the sector number register of the
Command Block.
Sector Num (exp) - Contains the contents of the expanded address field of the
Shadow Register Block.
Status -
Contains the new value of the status register of the Command
Block at the conclusion of all subsequent PIO Data to Device
frames.
Transfer Count -
Holds the number of bytes to be transferred in the subsequent
data FIS.
5-20
C141-E280
Содержание MHZ2080BJ
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Страница 253: ...5 4 Command Protocol Device Host RegHD PIO Setup DATA Figure 5 14 PIO data in command protocol C141 E280 5 179 ...
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