ICS9FG108D Datasheet, PDF (12/18 Pages) Integrated Device Technology – Frequency Generator for CPU, QPI, FBD, PCIe Gen 2 & SATA

ICS9FG108D
Frequency Generator for CPU, QPI, FBD, PCIe Gen 2 & SATA
SMBus Table: PLL Frequency Control Register
Byte 10 Pin #
Name
Control Function
Bit 7
-
PLL N Div8
N Divider Prog bit 8
Bit 6
-
PLL N Div9
N Divider Prog bit 9
Bit 5
-
PLL M Div5
Bit 4
-
PLL M Div4
Bit 3
-
PLL M Div3 M Divider Programming
Bit 2
-
PLL M Div2
bit (5:0)
Bit 1
-
PLL M Div1
Bit 0
-
PLL M Div0
Type
RW
RW
RW
RW
RW
RW
RW
RW
0
1 Default
The decimal
X
representation of M and
N Divider in Byte 11 and
X
12 will configure the PLL ^X
VCO frequency.
X
Default at power up =
X
latch-in or Byte 0 Rom
X
table. VCO Frequency
= fXTAL x [NDiv(9:0)+8] ^X
/ [MDiv(5:0)+2]
X
SMBus Table: PLL Frequency Control Register
Byte 11 Pin #
Name
Control Function
Bit 7
-
PLL N Div7
Bit 6
-
PLL N Div6
Bit 5
-
Bit 4
-
Bit 3
-
Bit 2
-
PLL N Div5
PLL N Div4
PLL N Div3
PLL N Div2
N Divider Programming
Byte11 bit(7:0) and
Byte10 bit(7:6)
Bit 1
-
PLL N Div1
Bit 0
-
PLL N Div0
Type
RW
RW
RW
RW
RW
RW
RW
RW
0
1 Default
The decimal
X
representation of M and
N Divider in Byte 11 and
X
12 will configure the PLL ^X
VCO frequency.
X
Default at power up =
X
latch-in or Byte 0 Rom
X
table. VCO Frequency
= fXTAL x [NDiv(9:0)+8] ^X
/ [MDiv(5:0)+2]
X
SMBus Table: PLL Spread Spectrum Control Register
Byte 12 Pin #
Name
Control Function
Bit 7
-
PLL SSP7
Bit 6
-
PLL SSP6
Bit 5
-
PLL SSP5
Bit 4
-
Bit 3
-
PLL SSP4
PLL SSP3
Spread Spectrum
Programming bit(7:0)
Bit 2
-
PLL SSP2
Bit 1
-
PLL SSP1
Bit 0
-
PLL SSP0
Type
RW
RW
RW
RW
RW
RW
RW
RW
0
1 Default
X
These Spread
X
Spectrum bits in
X
Byte 13 and 14 will ^X
program the spread ^X
pecentage of PLL
X
X
X
SMBus Table: PLL Spread Spectrum Control Register
Byte 13 Pin #
Name
Control Function
Bit 7
-
Reserved
Bit 6
-
PLL SSP14
Bit 5
-
PLL SSP13
Bit 4
-
Bit 3
-
Bit 2
-
PLL SSP12
PLL SSP11
PLL SSP10
Spread Spectrum
Programming bit(14:8)
Bit 1
-
PLL SSP9
Bit 0
-
PLL SSP8
Type
RW
RW
RW
RW
RW
RW
RW
0
1 Default
0
X
These Spread
X
Spectrum bits in
X
Byte 13 and 14 will X
program the spread X
pecentage of PLL X
X
IDT^TM Frequency Generator for CPU, QPI, FBD, PCIe Gen 2 & SATA
12
1542E 12/16/10