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CS2100-CP-CZZR Scheda tecnica(PDF) 2 Page - Cirrus Logic

Il numero della parte CS2100-CP-CZZR
Spiegazioni elettronici  Fractional-N Clock Multiplier
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Produttore elettronici  CIRRUS [Cirrus Logic]
Homepage  http://www.cirrus.com
Logo CIRRUS - Cirrus Logic

CS2100-CP-CZZR Scheda tecnica(HTML) 2 Page - Cirrus Logic

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CS2100-CP
2
DS840PP1
TABLE OF CONTENTS
1. PIN DESCRIPTION ................................................................................................................................. 4
2. TYPICAL CONNECTION DIAGRAM ..................................................................................................... 5
3. CHARACTERISTICS AND SPECIFICATIONS ...................................................................................... 6
RECOMMENDED OPERATING CONDITIONS .................................................................................... 6
ABSOLUTE MAXIMUM RATINGS ........................................................................................................ 6
DC ELECTRICAL CHARACTERISTICS ................................................................................................ 6
AC ELECTRICAL CHARACTERISTICS ................................................................................................ 7
CONTROL PORT SWITCHING CHARACTERISTICS- I²C FORMAT ................................................... 8
CONTROL PORT SWITCHING CHARACTERISTICS - SPI FORMAT ................................................. 9
4. ARCHITECTURE OVERVIEW ............................................................................................................. 10
4.1 Delta-Sigma Fractional-N Frequency Synthesizer ......................................................................... 10
4.2 Hybrid Analog-Digital Phase Locked Loop ....................................................................................10
5. APPLICATIONS ................................................................................................................................... 12
5.1 Timing Reference Clock Input ........................................................................................................ 12
5.1.1 Internal Timing Reference Clock Divider ............................................................................... 12
5.1.2 Crystal Connections (XTI and XTO) ...................................................................................... 12
5.1.3 External Reference Clock (REF_CLK) .................................................................................. 13
5.2 Frequency Reference Clock Input, CLK_IN ................................................................................... 13
5.2.1 CLK_IN Frequency Detector ................................................................................................. 13
5.2.2 CLK_IN Skipping Mode ......................................................................................................... 13
5.2.3 Adjusting the Minimum Loop Bandwidth for CLK_IN ............................................................ 15
5.3 Output to Input Frequency Ratio Configuration ............................................................................. 16
5.3.1 User Defined Ratio (RUD) ..................................................................................................... 16
5.3.2 Manual Ratio Modifier (R-Mod) ............................................................................................. 17
5.3.3 Automatic Ratio Modifier (Auto R-Mod) ................................................................................. 17
5.3.4 Effective Ratio (REFF) .......................................................................................................... 18
5.3.5 Ratio Configuration Summary ............................................................................................... 19
5.4 PLL Clock Output ........................................................................................................................... 20
5.5 Auxiliary Output .............................................................................................................................. 20
5.6 Clock Output Stability Considerations ............................................................................................ 21
5.6.1 Output Switching ................................................................................................................... 21
5.6.2 PLL Unlock Conditions .......................................................................................................... 21
6. SPI / I²C CONTROL PORT ................................................................................................................... 22
6.1 SPI Control ..................................................................................................................................... 22
6.2 I²C Control ...................................................................................................................................... 22
6.3 Memory Address Pointer ............................................................................................................... 24
6.3.1 Map Auto Increment .............................................................................................................. 24
7. REGISTER QUICK REFERENCE ........................................................................................................ 24
8. REGISTER DESCRIPTIONS ................................................................................................................ 25
8.1 Device I.D. and Revision (Address 01h) ....................................................................................... 25
8.1.1 Device Identification (Device[4:0]) - Read Only ..................................................................... 25
8.1.2 Device Revision (Revision[2:0]) - Read Only ........................................................................ 25
8.2 Device Control (Address 02h) ........................................................................................................ 25
8.2.1 Unlock Indicator (Unlock) - Read Only .................................................................................. 25
8.2.2 PLL Input Sample Rate Indicator (FsDet[1:0]) - Read Only .................................................. 25
8.2.3 Auto R-Modifier Enable (AutoRMod) ..................................................................................... 26
8.2.4 Auxiliary Output Disable (AuxOutDis) ................................................................................... 26
8.2.5 PLL Clock Output Disable (ClkOutDis) .................................................................................. 26
8.3 Device Configuration 1 (Address 03h) ........................................................................................... 26
8.3.1 R-Mod Selection (RModSel[2:0]) ...........................................................................................26
8.3.2 Auxiliary Output Source Selection (AuxOutSrc[1:0]) ............................................................. 27
8.3.3 Enable Device Configuration Registers 1 (EnDevCfg1) ........................................................ 27


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