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參數(shù)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(shù): 136/159頁
文件大小: 3984K
代理商: W83C553F
W83C553F
4.4.3
(Base Address Register 4 value + offset: 07h-04h, 0Fh-0Ch)
These registers contain the starting address of the first Physical Region Descriptor Table in memory which applies to cases
where the W83C553F is functioning as a PCI bus master with one or more multi-word DMA mode disk drives. Bits 31
through 2 define a double word aligned address in memory. Bits 1 and 0 are reserved and will be ignored on writes and read
as 00b. The information in the descriptor table controls where the data is transferred to/from in system memory, how much
data is transferred and when the transfer is complete.
The descriptor table is composed of one or more Physical Region Descriptors. Each entry is two double words (8 bytes) and
is defined below.
Table 4-6
.
Physical Region Descriptor
Electrical Specifications
WINBOND SYSTEMS LABORATORY
133
Primary/Secondary PRD Table
Data Bits
Dword
31
16
15
0
0
Memory Region Physical Base Address (31:2)
00
1
EOT
Reserved
Byte Count
The Memory Region Physical Base Address specifies a word aligned address in memory that the bus master will transfer data
to/from.
The byte count specifies the number of bytes of data to transfer to this region of memory. The byte count is required to be
even (D0=0b). The maximum number of bytes defined in one descriptor entry is 64K which is selected by a value of 00h.
The number of bytes specified must not cause the memory region specified to cross a 64K boundary.
Bit 31 of double word 1 is the End Of Table flag. Bus master operation terminates upon completion of the descriptor entry
that has EOT set.
The Physical Region Descriptor Table cannot cross a 64K memory boundary.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)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