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參數資料
型號: W83C553F
廠商: WINBOND ELECTRONICS CORP
元件分類: 總線控制器
英文描述: SYSTEM I/O CONTROLLER WITH PCI ARBITER
中文描述: ISA BUS CONTROLLER, PQFP208
封裝: 28 X 28 MM, PLASTIC, QFP-208
文件頁數: 92/159頁
文件大小: 3984K
代理商: W83C553F
W83C553F
Scatter/Gather Registers
Scatter/Gather (S/G) provides the capability of transferring multiple buffers between memory (ISA/PCI) and I/O (ISA DMA
device) without CPU intervention. In Scatter/Gather the DMA can read the memory address and word count from an array of
buffer descriptors located in system memory (PCI only), called the Scatter/Gather Descriptor (SCD) table. This allows the
DMA controller to sustain DMA transfers until all of the buffers in the SGD table are transferred.
Software prepares a SGD table in system memory. Each SGD is 8-bytes long and consists of an address pointer to the
starting address and the byte count (number of bytes) of the memory buffer to be transferred. In any given SGD table, two
consecutive SGDs are offset by 8-bytes and are aligned on a 4-byte boundary. Each SGD is defined below. For an 8-bit
DMA I/O device:
Electrical Specifications
WINBOND SYSTEMS LABORATORY
89
For a 16-bit DMA I/O device, bit 0 of the Memory Buffer Starting Address and byte count must be 0.
Bit 31 of Dword 1 is the end of Link Flag. Bus master operation terminates upon completion of the description entry that has
EOL set.
The SGD table cannot cross a 64k memory boundary.
The addresses of all of the registers located from 43Fh to 40Ah (except 40Bh) are relocatable by programming the
Scatter/Gather Relocation Base Address Register (Function 0, address 41h) in the PCI Configuration Space.
These registers
are marked with an asterisk (*).
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相關代理商/技術參數
參數描述
W83C553FG 制造商:Winbond Electronics Corp 功能描述:
W83C553F-G 制造商:未知廠家 制造商全稱:未知廠家 功能描述:W83C553F-G Highly Integrated System I/O Controller for Power PCTM (South Bridge) QFP 208
W83C553FY-G 制造商:Nuvoton Technology Corp 功能描述:I/O Controller Phase Controller 208-Pin PQFP 制造商:Winbond Electronics 功能描述:I/O CONTROLLER 制造商:Nuvoton Technology 功能描述:I/O Controller Phase Controller 208-Pin PQFP
W83C554F 制造商:WINBOND 制造商全稱:Winbond 功能描述:SYSTEM I/O CONTROLLER WITH PCI ARBITER & UltraDMA/33 IDE Controller
W83C554FY 制造商:Nuvoton Technology Corp 功能描述:I/O Controller Phase Controller 制造商:Nuvoton Technology 功能描述:I/O Controller Phase Controller