Bluegiga Technologies Oy
TABLE OF CONTENTS
1 WT32i Product Numbering ............................................................................................................................7
2 Block diagram ................................................................................................................................................8
3 Pinout and Terminal Description ...................................................................................................................9
4 Electrical Characteristics ............................................................................................................................ 12
4.1 Absolute Maximum Ratings ................................................................................................................ 12
4.2 Recommended Operating Conditions ................................................................................................. 12
4.3 Digital Terminals.................................................................................................................................. 12
4.4 Audio Characteristics .......................................................................................................................... 13
4.4.1 ADC .............................................................................................................................................. 13
4.4.2 DAC .............................................................................................................................................. 14
4.4.3 A2DP Codecs............................................................................................................................... 14
4.5 RF Characteristics ............................................................................................................................... 16
4.5.1 RF Transceiver ............................................................................................................................ 16
4.5.2 Antenna Characteristics ............................................................................................................... 17
4.6 Current Consumption .......................................................................................................................... 20
5 Power Control and Regulation ................................................................................................................... 21
5.1 Reset ................................................................................................................................................... 23
5.1.1 Internal POR ................................................................................................................................ 24
6 Battery Charger .......................................................................................................................................... 26
7 GPIO and AIO Functions ............................................................................................................................ 27
7.1 iWRAP supported GPIO Functions ..................................................................................................... 27
7.2 Outputting Internal Clocks ................................................................................................................... 27
7.3 Auxiliary ADC ...................................................................................................................................... 28
7.4 Software I2C Interface ........................................................................................................................ 28
8 Serial Interfaces .......................................................................................................................................... 29
8.1 UART Interface .................................................................................................................................... 29
8.1.1 Resetting Through UART Break Signal ....................................................................................... 30
8.1.2 UART Configuration While Reset is Active .................................................................................. 30
8.1.3 UART Bypass Mode .................................................................................................................... 30
8.2 USB Interface ...................................................................................................................................... 31
8.3 Programming and Debug Interface (SPI) ............................................................................................ 32
9 Audio Interfaces .......................................................................................................................................... 33
9.1 Stereo Audio Codec Interface ............................................................................................................. 33
9.1.1 ADC .............................................................................................................................................. 33
9.1.2 DAC .............................................................................................................................................. 35
9.1.3 Microphone Input ......................................................................................................................... 36
9.1.4 Line Input ..................................................................................................................................... 37