參數(shù)資料
型號(hào)： SiI3531ACNU
廠商： Silicon Image, Inc.
英文描述： PCI Express to Serial ATA Controller
中文描述： PCI Express到串行ATA控制器
文件頁(yè)數(shù)： 21/81頁(yè)
文件大小： 553K
代理商： SII3531ACNU
PCI Express to Serial ATA Controller
Silicon Image, Inc.
5.2 SiI3531A S-ATA Port Block Diagram
The block diagram below shows the logic structure of the SiI3531A Serial-ATA Port.
Data Sheet
2006 Silicon Image, Inc.
SiI-DS-0208-C
21
Data Path B
Data Path B
(Initiator)
Local Arbiter
PCI Exp – LRAM
DMA Controller
Data Path A
2 Addresses
PCI Exp – SATA
DMA Controller
Data Path B
1 Address
Command Fetch
Machine
Command
Fetch FIFO
31 x 5
Command
Execution
Machine
Command
Execute FIFO
31 x 5
Command
Receive FIFO
31 x 5
PCI Exp Application
Interface
Initiator
Target
PCI Exp / SATA
Data FIFO
128 x 64
SATA
Enhanced
Link
Rx FIFO
Registers
SATA PHY
Port Register File
Data Path A
(Initiator / Target)
LRAM
512 x 64
Dual Port
P
o
r
t
B
P
o
r
t
A
Figure 5-2 Port Logic Block Diagram
The Port Logic consists of:
A Local Arbiter that arbitrates between the two DMA Controllers
A DMA Controller for the PCI Express to LRAM Data Path
A DMA Controller for the PCI Express to Serial-ATA Data Path
A 512x64 Local RAM (LRAM) that contains: 31 LRAM Slots each of which is 128 bytes (16 Qwords) and 128 bytes
used to support 16 Port Multiplier devices (1 Qword per device)
A Data FIFO that contains 1024 bytes (128 Qwords)
A State Machine for Command Fetch
A State Machine for Command Execution
A Serial-ATA Link
A Serial-ATA PHY
Each of the two state machines has an associated FIFO which, when non-empty, indicates that processing is required. The
FIFO is loaded with a 5-bit command “slot” number to activate a state machine. The slot number can range from 0 to 30,
corresponding to the maximum number of active commands supported.
Command flow begins with a host driver building a command in a non-cached region of host memory. The data structure is
referred to as a PRB (Port Request Block). The 64-byte PRB is transferred into an available command slot in the LRAM by
one of two methods: the direct method or the indirect method. The host driver is responsible for determining which slots are
available. Either of the two command transfer methods may be used for each command transfer. The two methods are:
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