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WT21-A-HCI

BLUETOOTH HCI MODULE

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TABLE OF CONTENTS

1 Ordering Information ................................................................................................. 8

2 Pinout and Terminal Description .................................................................................. 9

3 Microcontroller, Memory and Baseband Logic .............................................................. 13

3.1 AuriStream CODEC ............................................................................................. 13

3.1.1 AuriStream CODEC Requirements ................................................................... 14

3.1.2 AuriStream Hierarchy .................................................................................... 14

3.2 Memory Managements Unit ................................................................................. 15

3.3 Burst Mode Controller ......................................................................................... 15

3.4 Physical Layer Hardware Engine DSP .................................................................... 15

3.5 WLAN Coexistence ............................................................................................. 16

3.6 Configurable I/O Parallel Ports ............................................................................. 16

4 Clock Generation ..................................................................................................... 17

4.1 32kHz External Reference Clock ........................................................................... 17

5 Serial Peripheral Interface (SPI) ................................................................................ 18

5.1 WT21 Serial Peripheral Interface (SPI) .................................................................. 18

5.2 Instruction Cycle ................................................................................................ 18

5.2.1 Writing to the Device .................................................................................... 18

5.2.2 Reading from the Device ............................................................................... 19

5.2.3 Multi-Slave Operation.................................................................................... 19

6 Host Interfaces........................................................................................................ 20

6.1 Host Selection ................................................................................................... 20

6.2 UART Interface .................................................................................................. 20

6.2.1 UART Configuration While Reset is Active ........................................................ 22

7 CSR Serial Peripheral Interface (CSPI)........................................................................ 23

7.1.1 CSPI Read/Write Cycles................................................................................. 23

7.1.2 CSPI Register Write Cycle .............................................................................. 24

7.1.3 CSPI Register Read Cycle .............................................................................. 24

7.1.4 CSPI Register Burst Write Cycle...................................................................... 24

7.1.5 CSPI Register Read Cycle .............................................................................. 25

7.2 SDIO Interface .................................................................................................. 26

7.2.1 SDIO/CSPI Deep-Sleep Control Schemes ......................................................... 26

7.2.2 Retransmission............................................................................................. 26

7.2.3 Signaling ..................................................................................................... 26

8 Audio Interfaces ...................................................................................................... 27

8.1 PCM Interface .................................................................................................... 27

8.1.1 PCM Interface Master/Slave ........................................................................... 27

Bluegiga Technologies Oy

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