參數(shù)資料
型號(hào)： PLI9080
廠商： Electronic Theatre Controls, Inc.
英文描述： PCI I/O ACCELERATOR
中文描述： 的PCI I / O加速器
文件頁數(shù)： 81/133頁
文件大小： 883K
代理商： PLI9080
SECTION 4
PCI 9080
REGISTERS
PLX Technology, Inc., 1997
Page 73
Version 0.93
4.6.2 (DMAPADR0; PCI:84h, LOC:104h) DMA Channel 0 PCI Address Register
Table 4-63. (DMAPADR0; PCI:84h, LOC:104h) DMA Channel 0 PCI Address Register
Field
Description
Read
Write
Value after Reset
31:0
PCI Address Register. Indicates from where in the PCI memory space the
DMA transfers (reads or writes) start.
Yes
Yes
0
4.6.3 (DMALADR0; PCI:88h, LOC:108h) DMA Channel 0 Local Address Register
Table 4-64. (DMALADR0; PCI:88h, LOC:108h) DMA Channel 0 Local Address Register
Field
Description
Read
Write
Value after Reset
31:0
Local Address Register. Indicates from where in the local memory space the
DMA transfers (reads or writes) start.
Yes
Yes
0
4.6.4 (DMASIZ0; PCI:8Ch, LOC:10Ch) DMA Channel 0 Transfer Size (Bytes) Register
Table 4-65. (DMASIZ0; PCI:8Ch, LOC:10Ch) DMA Channel 0 Transfer Size (Bytes) Register
Field
Description
Read
Write
Value after Reset
22:0
DMA Transfer Size (Bytes). Indicates number of bytes to be transferred during DMA
operation.
Yes
Yes
0
31:23
Reserved.
Yes
No
0
4.6.5 (DMADPR0; PCI:90h, LOC:110h) DMA Channel 0 Descriptor Pointer Register
Table 4-66. (DMADPR0; PCI:90h, LOC:110h) DMA Channel 0 Descriptor Pointer Register
Field
Description
Read
Write
Value after Reset
0
Descriptor Location. A value of 1 indicates the PCI address space. A value of 0
indicates the local address space.
Yes
Yes
0
1
End of Chain. A value of 1 indicates end of chain. A value of 0 indicates not end
of chain descriptor. (Same as Nonchaining Mode.)
Yes
Yes
0
2
Interrupt after Terminal Count. A value of 1 causes an interrupt to be generated after
the terminal count for this descriptor is reached. A value of 0 disables interrupts from
being generated.
Yes
Yes
0
3
Direction of Transfer. A value of 1 indicates transfers from local bus to PCI bus.
A value of 0 indicates transfers from PCI bus to local bus.
Yes
Yes
0
31:4
Next Descriptor Address. Quad word aligned (Bit [3:0] = 0000).
Yes
Yes
0
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