Cirrus-logic CS2200-CP Instrukcja Użytkownika

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Copyright Cirrus Logic, Inc. 2010
(All Rights Reserved)
http://www.cirrus.com
Fractional-N Frequency Synthesizer
Features
Delta-Sigma Fractional-N Frequency Synthesis
Generates a Low Jitter 6 - 75 MHz Clock
from an 8 - 75 MHz Reference Clock
Highly Accurate PLL Multiplication Factor
Maximum Error Less Than 1 PPM
I²C™ / SPI™ Control Port
Configurable Auxiliary Output
Buffered Reference Clock
PLL Lock Indication
Duplicate PLL Output
Flexible Sourcing of Reference Clock
External Oscillator or Clock Source
Supports Inexpensive Local Crystal
Minimal Board Space Required
No External Analog Loop-filter
Components
General Description
The CS2200-CP is an extremely versatile system clock-
ing device that utilizes a programmable phase lock loop.
The CS2200-CP is based on an analog PLL architec-
ture comprised of a Delta-Sigma Fractional-N
Frequency Synthesizer. This architecture allows for fre-
quency synthesis and clock generation from a stable
reference clock.
The CS2200-CP supports both I²C and SPI for full soft-
ware control.
The CS2200-CP is available in a 10-pin MSOP package
in Commercial (-10°C to +70°C) and Automotive (-40°C
to +85°C) grades.
Customer development kits are also available for device
evaluation. Please see “Ordering Information” on
page 25 for complete details.
I²C / SPI
Auxiliary
Output
6 to 75 MHz
PLL Output
3.3 V
I²C/SPI Software
Control
8 MHz to 75 MHz
Low-Jitter Timing
Reference
Output to Input
Clock Ratio
N
Timing Reference
PLL Output
PLL Lock Indicator
Fractional-N
Divider
Voltage Controlled
Oscillator
Internal
Loop Filter
Phase
Comparator
Delta-Sigma
Modulator
MAY '10
DS759F2
CS2200-CP
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Strona 1 - CS2200-CP

Copyright  Cirrus Logic, Inc. 2010(All Rights Reserved)http://www.cirrus.comFractional-N Frequency SynthesizerFeatures Delta-Sigma Fractional-N Freq

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CS2200-CP10 DS759F24. ARCHITECTURE OVERVIEW4.1 Delta-Sigma Fractional-N Frequency SynthesizerThe core of the CS2200 is a Delta-Sigma Fractional-N Freq

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CS2200-CPDS759F2 115. APPLICATIONS5.1 Timing Reference Clock InputThe low jitter timing reference clock (RefClk) can be provided by either an external

Strona 4 - 1. PIN DESCRIPTION

CS2200-CP12 DS759F25.1.2 Crystal Connections (XTI and XTO)An external crystal may be used to generate RefClk. To accomplish this, a 20 pF fundamental

Strona 5

CS2200-CPDS759F2 135.2.2 Ratio Modifier (R-Mod)The Ratio Modifier is used to internally multiply/divide the RUD (the Ratio stored in the register spac

Strona 6 - DC ELECTRICAL CHARACTERISTICS

CS2200-CP14 DS759F25.2.4 Ratio Configuration SummaryThe RUD is the user defined ratio stored in the register space. R-Mod is applied if selected. The

Strona 7 - AC ELECTRICAL CHARACTERISTICS

CS2200-CPDS759F2 155.4 Auxiliary OutputThe auxiliary output pin (AUX_OUT) can be mapped, as shown in Figure 10, to one of three signals: refer-ence cl

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CS2200-CP16 DS759F2thesizer. This includes all the bits shown in Figure 8 on page 14.• Any discontinuities on the Timing Reference Clock, REF_CLK.5.6

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CS2200-CPDS759F2 17The signal timings for a read and write cycle are shown in Figure 12 and Figure 13. A Start condition is de-fined as a falling tran

Strona 10 - 4. ARCHITECTURE OVERVIEW

CS2200-CP18 DS759F2Send stop condition, aborting write. Send start condition. Send 100111x1(chip address & read operation). Receive acknowledge bi

Strona 11 - 5. APPLICATIONS

CS2200-CPDS759F2 198. REGISTER DESCRIPTIONSIn I²C Mode all registers are read/write unless otherwise stated. In SPI mode all registers are write only.

Strona 12 - 40 pF 40 pF

CS2200-CP2 DS759F2TABLE OF CONTENTS1. PIN DESCRIPTION ...

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CS2200-CP20 DS759F28.2.3 PLL Clock Output Disable (ClkOutDis)This bit controls the output driver for the CLK_OUT pin. 8.3 Device Configuration 1 (Add

Strona 14

CS2200-CPDS759F2 218.3.3 Enable Device Configuration Registers 1 (EnDevCfg1)This bit, in conjunction with EnDevCfg2, configures the device for control

Strona 15

CS2200-CP22 DS759F28.6 Function Configuration 1 (Address 16h)8.6.1 AUX PLL Lock Output Configuration (AuxLockCfg)When the AUX_OUT pin is configured as

Strona 16 - 6. SPI / I²C CONTROL PORT

CS2200-CPDS759F2 239. CALCULATING THE USER DEFINED RATIONote: The software for use with the evaluation kit has built in tools to aid in calculating an

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CS2200-CP24 DS759F210.PACKAGE DIMENSIONSNotes: 1. Reference document: JEDEC MO-1872. D does not include mold flash or protrusions which is 0.15 mm max

Strona 18 - 7. REGISTER QUICK REFERENCE

CS2200-CPDS759F2 2511.ORDERING INFORMATION12.REFERENCES1. Audio Engineering Society AES-12id-2006: “AES Information Document for digital audio measure

Strona 19 - 8. REGISTER DESCRIPTIONS

CS2200-CP26 DS759F2Contacting Cirrus Logic SupportFor all product questions and inquiries, contact a Cirrus Logic Sales Representative. To find one ne

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CS2200-CPDS759F2 38.7 Function Configuration 2 (Address 17h) ...

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CS2200-CP4 DS759F21. PIN DESCRIPTIONPin Name # Pin DescriptionVD 1 Digital Power (Input) - Positive power supply for the digital and analog sections.G

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CS2200-CPDS759F2 52. TYPICAL CONNECTION DIAGRAM 21GNDSCL/CCLKSDA/CDIN2 kΩXTI/REF_CLKTST_INXTOCLK_OUTAUX_OUT0.1 µFVD+3.3 VNotes:1. Resistors required

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CS2200-CP6 DS759F23. CHARACTERISTICS AND SPECIFICATIONS RECOMMENDED OPERATING CONDITIONSGND = 0 V; all voltages with respect to ground. (Note 1)Notes:

Strona 24 - THERMAL CHARACTERISTICS

CS2200-CPDS759F2 7AC ELECTRICAL CHARACTERISTICSTest Conditions (unless otherwise specified): VD = 3.1 V to 3.5 V; TA = -10°C to +70°C (Commercial Grad

Strona 25 - 13.REVISION HISTORY

CS2200-CP8 DS759F2CONTROL PORT SWITCHING CHARACTERISTICS- I²C FORMATInputs: Logic 0 = GND; Logic 1 = VD; CL=20pF.Notes: 8. Data must be held for suffi

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CS2200-CPDS759F2 9CONTROL PORT SWITCHING CHARACTERISTICS - SPI FORMAT Inputs: Logic 0 = GND; Logic 1 = VD; CL=20pF.Notes: 9.tspi is only needed before

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