ICS9UMS9633BI
Advance Information
ULTRA MOBILE PC CLOCK FOR INDUSTRIAL TEMPERATURE RANGE
Byte
Bit(s)
0
PLL & Divider Enable Register
Name
Pin #
Description
Type
0
1
Default
This bit controls whether the PLL driving the CPU
and SRC clocks is enabled or not.
This bit controls whether the PLL driving the DOT
and clock is enabled or not.
This bit controls whether the PLL driving the LCD
clock is enabled or not.
7
6
-
-
PLL1 Enable
PLL2 Enable
PLL3 Enable
RW
0 = Disabled
1 = Enabled
1
RW
RW
0 = Disabled
0 = Disabled
1 = Enabled
1 = Enabled
1
5
4
-
-
1
0
Reserved
This bit controls whether the CPU output divider is
enabled or not.
3
2
1
0
-
-
-
-
CPU Divider Enable
RW
RW
RW
RW
0 = Disabled
0 = Disabled
0 = Disabled
0 = Disabled
1 = Enabled
1 = Enabled
1 = Enabled
1 = Enabled
1
1
1
1
This bit should be automatically set to ‘0’ if
bit 7 is set to ‘0’.
NOTE:
This bit controls whether the SRC output divider is
enabled or not.
NOTE: This bit should be automatically set to ‘0’ if
bit 7 is set to ‘0’.
This bit controls whether the LCD output divider is
enabled or not.
SRC Output Divider
Enable
LCD Output Divider
Enable
This bit should be automatically set to ‘0’ if
bit 5 is set to ‘0’.
NOTE:
This bit controls whether the DOT output divider is
enabled or not.
DOT Output Divider
Enable
This bit should be automatically set to ‘0’ if
bit 6 is set to ‘0’.
NOTE:
Byte
Bit(s)
1
PLL SS Enable/Control Register
Name
Pin #
Description
Type
0
1
Default
This bit controls whether PLL1 has spread enabled
or not. Spread spectrum for PLL1 is set at -0.5%
down-spread. Note that PLL1 drives the CPU and
SRC clocks.
7
6
PLL1 SS Enable
RW
0 = Disabled
1 = Enabled
1
This bit controls whether PLL3 has spread enabled
or not. Note that PLL3 drives the SSC clock, and
that the spread spectrum amount is set in bits 3-5.
PLL3 SS Enable
PLL3 FS Select
RW
RW
0 = Disabled
1 = Enabled
1
5
4
3
2
1
0
These 3 bits select the frequency of PLL3 and the
0
0
0
0
0
0
See Table 2: LCD Spread
Select Table
SSC clock when Byte 1 Bit 6 (PLL3 Spread
Spectrum Enable) is set.
Reserved
Reserved
Reserved
IDTTM/ICSTM Ultra Mobile PC Clock for Industrial Temperature Range
1451—01/20/09
13
IDT [ INTEGRATED DEVICE TECHNOLOGY ]
