10
Integrated
Circuit
Systems, Inc.
ICS951402
Advance Information
0660—05/05/05
I
2C Table: VCO Frequency Control Register
Byte 12 Pin #
Name
Control
Function
Type
0
1
PWD
Bit 7
-
N Div7
RW
-
X
Bit 6
-
N Div6
RW
-
X
Bit 5
-
N Div5
RW
-
X
Bit 4
-
N Div4
RW
-
X
Bit 3
-
N Div3
RW
-
X
Bit 2
-
N Div2
RW
-
X
Bit 1
-
N Div1
RW
-
X
Bit 0
-
N Div0
The decimal
representation of N
Div (8:0) is equal to
VCO divider value.
Default at power up
= latch-in or Byte 0
Rom table.
RW
-
X
I
2C Table: Spread Spectrum Control Register
Byte 13 Pin #
Name
Control
Function
Type
0
1
PWD
Bit 7
-
SSP7
RW
-
X
Bit 6
-
SSP6
RW
-
X
Bit 5
-
SSP5
RW
-
X
Bit 4
-
SSP4
RW
-
X
Bit 3
-
SSP3
RW
-
X
Bit 2
-
SSP2
RW
-
X
Bit 1
-
SSP1
RW
-
X
Bit 0
-
SSP0
These Spread
Spectrum bits will
program the spread
percentage. It is
recommended to use
ICS Spread % table
for spread
programming.
RW
-
X
I
2C Table: Spread Spectrum Control Register
Byte 14 Pin #
Name
Control
Function
Type
0
1
PWD
Bit 7
-
Reserved
R
-
X
Bit 6
-
Reserved
R
-
X
Bit 5
-
Reserved
R
-
X
Bit 4
-
SSP12
RW
-
X
Bit 3
-
SSP11
RW
-
X
Bit 2
-
SSP10
RW
-
X
Bit 1
-
SSP9
RW
-
X
Bit 0
-
SSP8
It is recommended
to use ICS Spread
% table for spread
programming.
RW
-
X