SC2200 NSC [National Semiconductor], SC2200 Datasheet - Page 302

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

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Core Logic Module
Write
I/O Port 009h
I/O Port 00Ah
1:0
7:3
1:0
7:3
1:0
Bit
2
1
0
7
6
5
4
3
2
2
2
Description
Channel 2 Terminal Count. Indicates if TC was reached.
0: No.
1: Yes.
Channel 1 Terminal Count. Indicates if TC was reached.
0: No.
1: Yes.
Channel 0 Terminal Count. Indicates if TC was reached.
0: No.
1: Yes.
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 3:0.
0: Disable.
1: Enable.
Reserved. Must be set to 0.
Reserved. Must be set to 0.
Request Type.
0: Reset.
1: Set.
Channel Number Request Select
00: Channel 0.
01: Channel 1.
10: Channel 2.
11: Channel 3.
Reserved. Must be set to 0.
Channel Mask.
0: Not masked.
1: Masked.
Channel Number Mask Select.
00: Channel 0.
01: Channel 1.
10: Channel 2.
11: Channel 3.
Table 5-43. DMA Channel Control Registers (Continued)
(Continued)
Software DMA Request Register, Channels 3:0 (W)
DMA Channel Mask Register, Channels 3:0 (WO)
DMA Command Register, Channels 3:0
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