ICS952702 Datasheet, PDF (9/17 Pages) Integrated Circuit Systems – Programmable Timing Control Hub for K7 System

Integrated
Circuit
Systems, Inc.
ICS952702
I²C Table: VCO Control Select Bit & WD Timer Control Register
Byte 10 Pin #
Name
Control Function
Bit 7
-
Bit 6
-
Bit 5
-
Bit 4
-
Bit 3
-
Bit 2
-
Bit 1
-
Bit 0
-
M/NEN
WDEN
WDFSEN
WD SF4
WD SF3
WD SF2
WD SF1
WD SF0
M/N Programming
Enable
Watchdog Enable
WD Safe Frequency
Mode
Watch Dog Safe Freq
Programming bits
Type
0
1
RW
Disable
Enable
RW
Disable
Enable
RW Latched FS/Byte0 WD B10 b(4:0)
RW
RW
Writing to these bit will configure the
RW
safe frequency as Byte 0 Bit (4:0)
RW
RW
I²C Table: VCO Frequency Control Register
Byte 11 Pin #
Name
Control Function
Type
0
1
Bit 7
-
N Div8
N Divider Bit 8
RW
-
-
Bit 6
-
N Div9
N Divider Bit 9
RW
-
-
Bit 5
-
M Div5
The decimal
RW
-
-
Bit 4
-
M Div4
representation of M Div _RW
-
-
Bit 3
-
M Div3
(5:0) + 2 is equal to
RW
-
-
reference divider value.
Bit 2
-
M Div2
Default at power up =
RW
-
-
Bit 1
-
M Div1
latch-in or Byte 0 Rom ^RW
-
-
Bit 0
-
M Div0
table.
RW
-
-
I²C Table: VCO Frequency Control Register
Byte 12 Pin #
Name
Control Function
Type
0
1
Bit 7
-
N Div7
RW
-
-
Bit 6
-
N Div6
The decimal
RW
-
-
Bit 5
-
N Div5
representation of N Div RW
-
-
Bit 4
-
N Div4
(9:0) + 8 is equal to VCO RW
-
-
Bit 3
-
N Div3
divider value. Default at RW
-
-
Bit 2
-
N Div2
power up = latch-in or RW
-
-
Bit 1
-
N Div1
Byte 0 Rom table.
RW
-
-
Bit 0
-
N Div0
RW
-
-
I²C Table: Spread Spectrum Control Register
Byte 13 Pin #
Name
Control Function
Type
0
1
Bit 7
-
SSP7
RW
-
-
Bit 6
-
SSP6
These Spread Spectrum RW
-
-
Bit 5
-
SSP5
bits will program the
RW
-
-
Bit 4
-
SSP4
spread percentage. It is RW
-
-
Bit 3
-
SSP3
recommended to use ICS RW
-
-
Bit 2
-
SSP2
Spread % table for
RW
-
-
Bit 1
-
SSP1
spread programming. RW
-
-
Bit 0
-
SSP0
RW
-
-
PWD
0
0
0
0
1
0
0
0
PWD
X
X
X
X
X
X
X
X
PWD
X
X
X
X
X
X
X
X
PWD
X
X
X
X
X
X
X
X
0795D—05/06/05
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