CY7C64225

Document Number: 001-76294 Rev. *B

Page 2 of 19

Contents

Applications ...................................................................... 3

Functional Overview ........................................................ 3

Introduction .................................................................. 3

Functional Description ..................................................... 3

USB Interface .............................................................. 3

UART Controller .......................................................... 3

Suspend and Resume ................................................. 3

WAKE .......................................................................... 3

Reset ........................................................................... 3

Activity Indicators ........................................................ 3

VCFG .......................................................................... 4

VBUS ........................................................................... 4

Regulator ..................................................................... 4

Oscillator ..................................................................... 4

Flash ............................................................................ 4

Configurations .................................................................. 4

Software and Driver Support ........................................... 4

Pin Configuration ............................................................. 5

28-pin part pinout Description ..................................... 5

Application Circuits .......................................................... 6

Bus Powered Design ................................................... 6

Bus Powered Design using External Regulator .......... 7

Self Powered Design ................................................... 8

Application Diagram ......................................................... 9

USB to RS-232 Converter ........................................... 9

USB to UART cable with TTL level UART signals .... 10

Interfacing CY7C64225

with Bus Powered Microcontroller .................................... 11

Interfacing CY7C64225

with Self Powered Microcontroller .................................... 12

Absolute Maximum Ratings .......................................... 13

Operating Temperature .................................................. 13

DC Electrical Characteristics ........................................ 14

DC GPIO Specifications ............................................ 14

DC Full-Speed USB Specifications ........................... 14

Ordering Information ...................................................... 15

Ordering Code Definitions ......................................... 15

Packaging Information ................................................... 16

Package Diagrams .................................................... 16

Thermal Impedance .................................................. 16

Solder Reflow Peak Temperature ............................. 16

Acronyms ........................................................................ 17

Reference Documents .................................................... 17

Document Conventions ................................................. 17

Units of Measure ....................................................... 17

Glossary .......................................................................... 17

Document History Page ................................................. 18

Sales, Solutions, and Legal Information ...................... 19

Worldwide Sales and Design Support ....................... 19

Products .................................................................... 19

PSoC Solutions ......................................................... 19