NH82801DBSL8DE 869490 Intel, NH82801DBSL8DE 869490 Datasheet - Page 394
NH82801DBSL8DE 869490
Manufacturer Part Number
NH82801DBSL8DE 869490
Description
Manufacturer
Intel
Datasheet
1.NH82801DBSL8DE_869490.pdf
(587 pages)
Specifications of NH82801DBSL8DE 869490
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IDE Controller Registers (D31:F1)
10.1.23
394
Note: For FAST_SCB1=1 (133 MHz clk) in bits [13:12, 9:8, 5:4, 1:0], refer to
SDMA_TIM—Synchronous DMA Timing Register
(IDE—D31:F1)
Address Offset:
Default Value:
15:14
13:12
11:10
Bit
9:8
7:6
5:4
3:2
1:0
Reserved
Secondary Drive 1 Cycle Time (SCT1) — R/W. For Ultra ATA mode. The setting of these bits
determines the minimum write strobe cycle time (CT). The DMARDY#-to-STOP (RP) time is also
determined by the setting of these bits.
SCB1 = 0 (33 MHz clk)
00 = CT 4 clocks, RP 6 clocks
01 = CT 3 clocks, RP 5 clocks
10 = CT 2 clocks, RP 4 clocks
11 = Reserved
Reserved
Secondary Drive 0 Cycle Time (SCT0) — R/W. For Ultra ATA mode. The setting of these bits
determines the minimum write strobe cycle time (CT). The DMARDY#-to-STOP (RP) time is also
determined by the setting of these bits.
SCB1 = 0 (33 MHz clk)
00 = CT 4 clocks, RP 6 clocks
01 = CT 3 clocks, RP 5 clocks
10 = CT 2 clocks, RP 4 clocks
11 = Reserved
Reserved
Primary Drive 1 Cycle Time (PCT1) — R/W. For Ultra ATA mode, the setting of these bits
determines the minimum write strobe cycle time (CT). The DMARDY#-to-STOP (RP) time is also
determined by the setting of these bits.
PCB1 = 0 (33 MHz clk)
00 = CT 4 clocks, RP 6 clocks
01 = CT 3 clocks, RP 5 clocks
10 = CT 2 clocks, RP 4 clocks
11 = Reserved
Reserved
Primary Drive 0 Cycle Time (PCT0) — R/W. For Ultra ATA mode, the setting of these bits
determines the minimum write strobe cycle time (CT). The DMARDY#-to-STOP (RP) time is also
determined by the setting of these bits.
PCB1 = 0 (33 MHz clk)
00 = CT 4 clocks, RP 6 clocks
01 = CT 3 clocks, RP 5 clocks
10 = CT 2 clocks, RP 4 clocks
11 = Reserved
4A
0000h
–
4Bh
SCB1 = 1 (66 MHz clk)
00 = Reserved
01 = CT 3 clocks, RP 8 clocks 01 = CT 3 clks, RP 16 clks
10 = CT 2 clocks, RP 8 clocks 10 = Reserved
11 = Reserved
SCB1 = 1 (66 MHz clk)
00 = Reserved
01 = CT 3 clocks, RP 8 clocks 01 = CT 3 clks, RP 16 clks
10 = CT 2 clocks, RP 8 clocks 10 = Reserved
11 = Reserved
PCB1 = 1 (66 MHz clk)
00 = Reserved
01 = CT 3 clocks, RP 8 clocks 01 = CT 3 clks, RP 16 clks
10 = CT 2 clocks, RP 8 clocks 10 = Reserved
11 = Reserved
PCB1 = 1 (66 MHz clk)
00 = Reserved
01 = CT 3 clocks, RP 8 clocks 01 = CT 3 clks, RP 16 clks
10 = CT 2 clocks, RP 8 clocks 10 = Reserved
11 = Reserved
Description
Attribute:
Size:
R/W
16 bits
Intel
FAST_SCB1 = 1 (133 MHz clk)
00 = Reserved
11 = Reserved
FAST_SCB1 = 1 (133 MHz clk)
00 = Reserved
11 = Reserved
FAST_PCB1 = 1 (133 MHz clk)
00 = Reserved
11 = Reserved
FAST_PCB1 = 1 (133 MHz clk)
00 = Reserved
11 = Reserved
®
Section 5.15.6
82801DB ICH4 Datasheet
for details.
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