ICS9148F-60 Просмотр технического описания (PDF) - Integrated Circuit Systems
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ICS9148F-60 Datasheet PDF : 10 Pages
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ICS9148-60
Serial Bitmap
Byte 3: Functionality & Frequency Select
& Spread Slect Register
Bit
Description
7
0: Center Spread (±0.25)
1: Down Spread (0 to -0.6%)
Bit
654
CPU
PCI
000
68.5
34.25
001
75.0
37.5
6:4
010
011
83.3
41.6
66.6
33.3
100
103
34.3
101
112
37.3
110
133.3
44.43
111
100
33.33
0 - Frequency is selected by
3
hardware select SEL100/66.6#
1 - Frequency is selected by 6:4 above
2
(Reserved)
00 - Normal operation
10
01 - Test mode
10 - Spread sprectrum ON
11 - Tristate all outputs
PWD
0
0
0
00
Notes: 1 = Enabled; 0 = Disabled, outputs held low
Byte 5:
Bit
Pin#
Pin Name
PWD
Description
Bit Value = 0 Bit Value = 1
7 4 PCICLK_F 1
Disabled
(low)
Enabled
6 11 PCICLK5 1
Disabled
(low)
Enabled
5 10 PCICLK4 1
Disabled
(low)
Enabled
4-
-
0
(Reserved) (Reserved)
3 8 PCICLK3 1
Disabled
(low)
Enabled
2 7 PCICLK2 1
Disabled
(low)
Enabled
1 6 PCICLK1 1
Disabled
(low)
Enabled
0 5 PCICLK0 1
Disabled
(low)
Enabled
Notes: 1 = Enabled; 0 = Disabled, outputs held low
Byte 4:
Bit
Pin#
Pin Name
PWD
Description
Bit Value = 0 Bit Value = 1
7-
-
-
(Reserved) (Reserved)
6-
-
-
(Reserved) (Reserved)
5-
-
-
(Reserved) (Reserved)
4-
-
-
(Reserved) (Reserved)
3-
-
-
(Reserved) (Reserved)
2 21 CPUCLK1 1
Disabled
(low)
Enabled
1-
-
0
(Reserved) (Reserved)
0 22 CPUCLK0 1
(Disabled)
(low)
Enabled
Notes: 1 = Enabled; 0 = Disabled, outputs held low
Note: PWD = Power-Up Default
Byte 6:
Bit
Pin# Pin Name PWD
Description
Bit Value = 0 Bit Value = 1
7-
-
0
(Reserved) (Reserved)
6-
-
0
(Reserved) (Reserved)
5 24 IOAPIC 1
Disabled
(low)
Enabled
4-
-
0
(Reserved) (Reserved)
3-
-
0
(Reserved) (Reserved)
2-
-
0
(Reserved) (Reserved)
1 27 REF0
1
(Disabled)
(low)
Enabled
0 27 REF0
1
(Disabled)
(low)
Enabled
Notes:
1 = Enabled; 0 = Disabled, outputs held low
For pin 27, there are 2 output stages together for 1 pin. These 2
latches must be both 0 or 1 simultaneously or there will be a short to
ground if one is disabled and the other is running.
4
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