参数资料
型号: S5933QE
厂商: APPLIEDMICRO INC
元件分类: 总线控制器
英文描述: PCI BUS CONTROLLER, PQFP160
封装: PLASTIC, QFP-160
文件页数: 100/176页
文件大小: 823K
代理商: S5933QE
3-11
ARCHITECTURAL OVERVIEW
S5933
FIFOs
Two separate FIFO data paths exist within the
S5933. One FIFO handles data movement from the
PCI bus to the Add-On bus (shown in Figure 3) and
the other handles movement in the opposite direction
(Figure 4). Both of the FIFOs are able to support PCI
bus mastering; each has an address pointer and
transfer count register associated with its PCI bus
transaction. An important feature of the S5933 is the
ability to optionally perform various endian transla-
tions when data is moved through the FIFO. This
feature permits a single Add-On product to maintain
a fixed endian structure within the Add-On while al-
lowing the system platform to operate in its own na-
tive endian format.
Figure 3. PCI to Add-On FIFO Concept
Figure 4. Add-On to PCI FIFO Concept
READ ADDRESS
REGISTER (WHEN MASTER)
READ TRANSFER
COUNT (WHEN MASTER)
DATA
32
2
32
32 X 8
FIFO
PCI TRANSFER*
FIFO FLAGS
+ CONTROL
READ FIFO
EMPTY STATUS
ADD-ON
FIFO READ CONTROL
FULL STATUS
PCI
DATA
*PCI BUS MEMORY READ = S5933 FIFO WRITE
WHEN S5933 IS BUS MASTER
+1
-1
26 BIT
COUNTER
ZERO DECODE
(STOP)
PCI INTERRUPT
ADD-ON INTERRUPT
PCI
ADDRESS
ENDIAN
CONVERSION
COUNTER
PCI
BUS
INTERFACE
ADD-ON
INTERFACE
WRITE ADDRESS
REGISTER (WHEN MASTER)
WRITE TRANSFER
COUNT (WHEN MASTER)
DATA
32
32 X 8
FIFO
PCI TRANSFER*
FIFO FLAGS
+ CONTROL
WR FULL
ADD-ON
FIFO WRITE
EMPTY
PCI
DATA
*PCI BUS MEMORY WRITE = S5933 FIFO READ
WHEN S5933 IS BUS MASTER
+1
26 BIT
COUNTER
ZERO DECODE
(STOP)
PCI INTERRUPT
ADD-ON INTERRUPT
PCI
ADDRESS
COUNTER
-1
2
PCI
BUS
INTERFACE
ADD-ON
INTERFACE
ENDIAN
CONVERSION
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