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WT21

WT21 EVALUATION KIT

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TABLE OF CONTENTS

1 Introduction................................................................................................................................................... 5

2 Physical outlook............................................................................................................................................ 6

3 Schematics ................................................................................................................................................... 7

4 Assembly .................................................................................................................................................... 10

5 Layout......................................................................................................................................................... 11

6 Interfaces.................................................................................................................................................... 12

6.1 Powering the evaluation board ............................................................................................................. 12

6.2 UART .................................................................................................................................................... 12

6.3 Host selection DIP switch ..................................................................................................................... 12

6.3.1 UART protocol selection .............................................................................................................. 12

6.3.2 UART baudrate negotation .......................................................................................................... 13

6.3.3 Loading the PS keys .................................................................................................................... 13

6.4 SPI interface ......................................................................................................................................... 14

6.5 SDIO and PIO interface........................................................................................................................ 14

6.6 PCM Codec and Audio Interface .......................................................................................................... 14

7 WEEE Compliance ..................................................................................................................................... 15

8 Contact Information .................................................................................................................................... 16

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