SC2200 NSC [National Semiconductor], SC2200 Datasheet - Page 304

• Manufacturer Part Number: SC2200
• Description: Thin Client On a Chip
• Manufacturer: NSC [National Semiconductor]

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Core Logic Module
I/O Port 0D0h (R/W)
Read
Write
1:0
Bit
7
6
5
4
3
2
1
0
7
6
5
4
3
2
Description
Channel 7 Request. Indicates if a request is pending.
0: No.
1: Yes.
Channel 6 Request. Indicates if a request is pending.
0: No.
1: Yes.
Channel 5 Request. Indicates if a request is pending.
0: No.
1: Yes.
Undefined
Channel 7 Terminal Count. Indicates if TC was reached.
0: No.
1: Yes.
Channel 6 Terminal Count. Indicates if TC was reached.
0: No.
1: Yes.
Channel 5 Terminal Count. Indicates if TC was reached.
0: No.
1: Yes.
Undefined.
DACK Sense.
0: Active high.
1: Active low.
DREQ Sense.
0: Active high.
1: Active low.
Write Selection.
0: Late write.
1: Extended write.
Priority Mode.
0: Fixed.
1: Rotating.
Timing Mode.
0: Normal.
1: Compressed.
Channels 7:4.
0: Disable.
1: Enable.
Reserved. Must be set to 0.
Table 5-43. DMA Channel Control Registers (Continued)
(Continued)
DMA Command Register, Channels 7:4
DMA Status Register, Channels 7:4
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Revision 3.0