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5.2 Logical Interface
5.2.3.7 Data - Host to Device or Device to Host (Bidirectional)
This Data FIS has the following layout:
3
1
3
0
2
9
2
8
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
1
9
1
8
1
7
1
6
1
5
1
4
1
3
1
2
1
1
1
0
98 7 6 5 4 3210
Reserved (0) Reserved (0) R R R Reserved (0) FIS Type (46h)
0
…
…
N Dwords of data
(1 to 2048 Dwords)
n
Figure 5.9 Data FIS (Bidirectional) layout
The Data FIS is used for data transfers between the host system and device.
5.2.3.8 PIO Setup – Device to Host
Error Status R I D Reserved (0) FIS Type (5Fh)
0
Dev / Head Cyl High Cyl Low Sector Number
1
Reserved (0) Cyl High (exp) Cyl Low (exp) Sector Num (exp) (0)
2
E_Status Reserved (0) Sector Count (exp) Sector Count
3
Reserved (0) Transfer Count
4
Figure 5.10 PIO Setup - Device to Host FIS layout
The PIO Setup FIS is a device to host FIS, FIS Type 5Fh. The PIO Setup FIS is
used by the device to provide the host adapter with the data transfer count and
DRQ block status during the PIO data phase. This information allows the host
adapter to control PIO data transfers. There are two command structure Response
mappings into a Response FIS in the serial transport.
a) 48-bit command structure PIO Setup mapping
b) 28-bit command structure PIO Setup mapping
C141-E249 5-21