CS2100-OTP Datasheet, PDF (22/28 Pages) Cirrus Logic – Fractional-N Clock Multiplier

6.1.2
CS2100-OTP
Auxiliary Output Source Selection (AuxOutSrc[1:0])
Selects the source of the AUX_OUT signal.
AuxOutSrc[1:0]
00
01
10
11
Application:
Auxiliary Output Source
RefClk.
CLK_IN.
CLK_OUT.
PLL Lock Status Indicator.
“Auxiliary Output” on page 18
Note: When set to 11, the AuxLockCfg global parameter sets the polarity and driver type (“AUX PLL
Lock Output Configuration (AuxLockCfg)” on page 23).
6.1.3
Auto R-Modifier Enable (AutoRMod)
Controls the automatic ratio modifier function.
AutoRMod
0
1
Application:
Automatic R-Mod State
Disabled.
Enabled.
“Automatic Ratio Modifier (Auto R-Mod)” on page 15
6.2 Ratio 0 - 3
The four 32-bit User Defined Ratios are stored in the CS2100’s one time programmable memory. See “Out-
put to Input Frequency Ratio Configuration” on page 14 and “Calculating the User Defined Ratio” on
page 25 for more details.
6.3 Global Configuration Parameters
6.3.1
Clock Skip Enable (ClkSkipEn)
This parameter enables clock skipping mode for the PLL and allows the PLL to maintain lock even when
the CLK_IN has missing pulses.
ClkSkipEn
0
1
Application:
PLL Clock Skipping Mode
Disabled.
Enabled.
“CLK_IN Skipping Mode” on page 11
Note: f_{CLK_IN} must be < 80 kHz to use this feature.
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