ICS950812 Datasheet, PDF (8/29 Pages) Integrated Circuit Systems – Frequency Generator with 200MHz Differential CPU Clocks

ICS950812
BYTE
9
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Pin #
35
Affected Pin
Name
VCHCLK Slew Control
7, 6, 5 PCICLK_F (2:0) Slew Contol
13, 12,
11, 10
18, 17, 16,
13, 12, 11, 10
PCICLK (3:0) Slew Contol
PCICLK (6:0) Slew Contol
Control Function
00 = High(default), 01 = Low,
11,10 = Medium
00 (default), 11 = Medium
01 = Low, 10 =High
00 (default), 11 = Medium
10 = Low, 01 =High
00 (default), 11 = Medium
10 = Low, 01 =High
Type
RW
RW
RW
RW
RW
RW
RW
RW
Bit Control
0
1
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
PWD
0
0
0
0
0
0
0
0
BYTE
10
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Pin #
X
X
24, 23,
22, 21
33, 35
X
X
Affected Pin
Name
-
-
3V66(5:2)/66MHZ_OUT(2:0)
Skew
3V66(1:0) Skew
-
-
Control Function
M/N Enable (Enable access to
Byte 11 - 14)
Unused
Approx 250ps per bit (Ref to PCI)
Approx 250ps per bit (Ref to PCI)
Unused
Unused
Type
RW
-
RW
RW
RW
RW
-
-
Bit Control
0
1
HW/B0
Byte
(11-14)
-
-
-
-
-
-
-
-
-
-
-
-
-
-
PWD
0
0
0
0
0
0
0
0
BYTE
11
Pin #
Affected Pin
Name
Control Function
Type
Bit Control
0
1
Bit 7
X
-
VCO Divider Bit8
RW
-
-
Bit 6
X
-
REF Divider Bit6
RW
-
-
Bit 5
X
-
Bit 4
X
-
REF Divider Bit5
REF Divider Bit4
RW
-
-
RW
-
-
Bit 3
X
-
Bit 2
X
-
Bit 1
X
-
REF Divider Bit3
REF Divider Bit2
REF Divider Bit1
RW
-
-
RW
-
-
RW
-
-
Bit 0
X
-
REF Divider Bit0
RW
-
-
Note: The decimal representation of these 7 bits (Byte 11 bit[6:0]) + 2 is equal to the REF divider value.
Note: See table 8 for Byte 11-14 default information
PWD
X
X
X
X
X
X
X
X
BYTE
12
Bit 7
Pin #
X
Affected Pin
Name
-
Control Function
VCO Divider Bit7
Type
RW
Bit Control
0
1
-
-
PWD
X
Bit 6
X
-
Bit 5
X
-
Bit 4
X
-
Bit 3
X
-
Bit 2
X
-
Bit 1
X
-
Bit 0
X
-
VCO Divider Bit6
VCO Divider Bit5
VCO Divider Bit4
VCO Divider Bit3
VCO Divider Bit2
VCO Divider Bit1
VCO Divider Bit0
RW
-
RW
-
RW
-
RW
-
RW
-
RW
-
RW
-
-
X
-
X
-
X
-
X
-
X
-
X
-
X
Note: The decimal representation of these 9 bits (Byte 12 bit[7:0]) and Byte 11 bit [7]) + 8 is equal to the VCO divider value.
Note: See table 8 for Byte 11-14 default information
0542G—08/21/03
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