308
AMD Geode™ SC2200 Processor Data Book
Core Logic Module - ISA Legacy Register Space
32580B
I/O Port 0D0h (R/W)
Read
DMA Status Register, Channels 7:4
Note:
Channels 5, 6, and 7 are not supported.
7
Channel 7 Request.
Indicates if a request is pending.
0: No.
1: Yes.
6
Channel 6 Request.
Indicates if a request is pending.
0: No.
1: Yes.
5
Channel 5 Request.
Indicates if a request is pending.
0: No.
1: Yes.
4
Undefined.
3
Channel 7 Terminal Count.
Indicates if TC was reached.
0: No.
1: Yes.
2
Channel 6 Terminal Count.
Indicates if TC was reached.
0: No.
1: Yes.
1
Channel 5 Terminal Count.
Indicates if TC was reached.
0: No.
1: Yes.
0
Undefined.
Write
DMA Command Register, Channels 7:4
Note:
Channels 5, 6, and 7 are not supported.
7
DACK Sense.
0: Active low.
1: Active high.
6
DREQ Sense.
0: Active high.
1: Active low.
5
Write Selection.
0: Late write.
1: Extended write.
4
Priority Mode.
0: Fixed.
1: Rotating.
3
Timing Mode.
0: Normal.
1: Compressed.
2
Channels 7:4.
0: Disable.
1: Enable.
1:0
Reserved.
Must be set to 0.
Table 6-43. DMA Channel Control Registers (Continued)
Bit
Description
Summary of Contents for Geode SC2200
Page 8: ...8 AMD Geode SC2200 Processor Data Book List of Figures 32580B...
Page 16: ...16 AMD Geode SC2200 Processor Data Book Overview 32580B...
Page 70: ...74 AMD Geode SC2200 Processor Data Book Signal Definitions 32580B...
Page 350: ...366 AMD Geode SC2200 Processor Data Book Debugging and Monitoring 32580B...
Page 422: ...440 AMD Geode SC2200 Processor Data Book Electrical Specifications 32580B...