CY22801KSXC-XXX(2011) Ver la hoja de datos (PDF) - Cypress Semiconductor

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CY22801KSXC-XXX
(Rev.:2011)

Universal Programmable Clock Generator (UPCG)

Cypress Semiconductor 

CY22801

Contents

Pin Configuration ............................................................. 3

External Reference Crystal/Clock Input ......................... 4

Output Clock Frequencies............................................... 4

VCXO ................................................................................. 4

VCXO Profile ............................................................... 4

Spread Spectrum Clock Generation (SSCG) ................. 4

Spread Percentage ..................................................... 5

Modulation Frequency................................................. 5

SSON Pin .................................................................... 5

Multifunction Pins ............................................................ 5

Frequency Calculation and Register

Definitions ......................................................................... 5

Default Startup Condition for the CY22801.................... 6

Frequency Calculations and Register Definitions using the

Serial (I2C) Interface......................................................... 6

PLL Frequency, Q Counter [42H(6..0)] ....................... 8

PLL Frequency, P Counter [40H(1..0)],

[41H(7..0)], [42H(7)] .................................................... 8

PLL Post Divider Options [0CH(7..0)], [47H(7..0)]....... 8

Charge Pump Settings [40H(2..0)] .............................. 8

Clock Output Settings: CLKSRC – Clock Output Crosspoint

Switch Matrix [44H(7..0)], [45H(7..0)], [46H(7..6)] ....... 9

Test, Reserved, and Blank Registers.......................... 9

Application Guideline..................................................... 11

Best Practices for Best Jitter Performance................ 11

Field Programming the CY22801 .................................. 11

CyClocksRT Software .................................................... 11

CY36800 InstaClock™ Kit .............................................. 11

Possible Configuration Examples ................................ 11

Informational Graphs ..................................................... 12

Absolute Maximum Conditions..................................... 13

Recommended Operating Conditions .......................... 13

Recommended Crystal Specifications ......................... 13

Pullable Crystal Specifications for

VCXO Application Only.................................................. 13

DC Electrical Specifications ..................................................... 14

AC Electrical Characteristics ........................................ 14

Test Circuit...................................................................... 15

Timing Definitions .......................................................... 16

80% .................................................................................. 16

20% .................................................................................. 16

2-wire Serial (I2C) Interface Timing............................... 17

Data Valid.................................................................. 17

Data Frame ............................................................... 17

Acknowledge Pulse ................................................... 17

Ordering Information...................................................... 19

Possible Configurations............................................. 19

Ordering Code Definitions ......................................... 19

Package Diagram............................................................ 20

Acronyms ........................................................................ 21

Document Conventions ................................................. 21

Units of Measure ....................................................... 21

Document History Page ................................................. 22

Sales, Solutions, and Legal Information ...................... 23

Worldwide Sales and Design Support....................... 23

Products .................................................................... 23

PSoC Solutions ......................................................... 23

Document #: 001-15571 Rev. *E

Page 2 of 23

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