SC3200 datasheet(317/447 Pages) AMD

317 / 447 page

AMD Geode™ SC3200 Processor Data Book

317

Core Logic Module - ISA Legacy Register Space

Revision 5.1

I/O Port 0D2h

Software DMA Request Register, Channels 7:4 (W)

Note:

Channels 5, 6, and 7 are not supported.

7:3

Reserved. Must be set to 0.

Request Type.

0: Reset.

1: Set.

1:0

Channel Number Request Select.

00: Illegal.

01: Channel 5.

10: Channel 6.

11: Channel 7.

I/O Port 0D4h

DMA Channel Mask Register, Channels 7:4 (WO)

Note:

Channels 5, 6, and 7 are not supported.

7:3

Reserved. Must be set to 0.

Channel Mask.

0: Not masked.

1: Masked.

1:0

Channel Number Mask Select.

00: Channel 4.

01: Channel 5.

10: Channel 6.

11: Channel 7.

I/O Port 0D6h

DMA Channel Mode Register, Channels 7:4 (WO)

Note:

Channels 5, 6, and 7 are not supported.

7:6

Transfer Mode.

00: Demand.

01: Single.

10: Block.

11: Cascade.

Address Direction.

0: Increment.

1: Decrement.

Auto-initialize.

0: Disabled

1: Enable

3:2

Transfer Type.

00: Verify.

01: Write transfer (I/O to memory).

10: Read transfer (memory to I/O).

11: Reserved.

1:0

Channel Number Mode Select.

00: Channel 4.

01: Channel 5.

10: Channel 6.

11: Channel 7.

Channel 4 must be programmed in cascade mode. This mode is not the default.

I/O Port 0D8h

DMA Clear Byte Pointer Command, Channels 7:4 (W)

Note:

Channels 5, 6, and 7 are not supported.

I/O Port 0DAh

DMA Master Clear Command, Channels 7:4 (W)

Note:

Channels 5, 6, and 7 are not supported.

I/O Port 0DCh

DMA Clear Mask Register Command, Channels 7:4 (W)

Note:

Channels 5, 6, and 7 are not supported.

Table 6-43. DMA Channel Control Registers (Continued)

Bit

Description

SC3200 Datasheet(PDF) 317 Page - Advanced Micro Devices

SC3200 Datasheet(HTML) 317 Page - Advanced Micro Devices

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL