WT41-A Datasheet, PDF (5/49 Pages) List of Unclassifed Manufacturers – Fully Qualified Bluetooth v2.1 + EDR end product

TABLE OF CONTENTS
1 Ordering Information......................................................................................................................................8
2 Pinout and Terminal Description ...................................................................................................................9
3 Electrical Characteristics ............................................................................................................................ 12
3.1 Absolute Maximum Ratings ................................................................................................................ 12
3.2 Recommended Operating Conditions ................................................................................................. 12
3.3 PIO Current Sink and Source Capability............................................................................................. 12
3.4 Transmitter Performance For BDR ..................................................................................................... 13
3.5 Radiated Spurious Emissions ............................................................................................................. 14
3.6 Receiver Performance ........................................................................................................................ 15
3.7 Current Consumption .......................................................................................................................... 15
3.8 Antenna Performance and Radiation Patterns ................................................................................... 16
4 Physical Dimensions .................................................................................................................................. 20
5 Layout Guidelines....................................................................................................................................... 22
5.1 WT41-A ............................................................................................................................................... 22
5.2 WT41-N ............................................................................................................................................... 23
5.2.1 Layout for WT41-N with u.fl connector close to RF pin ............................................................... 23
5.2.2 Layout for WT41-N with 50 ohm trace from RF pin to a SMA connector .................................... 23
6 UART Interface........................................................................................................................................... 25
6.1 UART Bypass ...................................................................................................................................... 27
6.2 UART Configuration While Reset is Active ......................................................................................... 27
6.3 UART Bypass Mode............................................................................................................................ 27
7 USB Interface ............................................................................................................................................. 28
7.1 USB Data Connections ....................................................................................................................... 28
7.2 USB Pull-Up resistor ........................................................................................................................... 28
7.3 USB Power Supply.............................................................................................................................. 28
7.4 Self-Powered Mode............................................................................................................................. 28
7.5 Bus-Powered Mode............................................................................................................................. 29
7.6 USB Suspend Current......................................................................................................................... 30
7.7 USB Detach and Wake-Up Signaling.................................................................................................. 30
7.8 USB Driver .......................................................................................................................................... 31
7.9 USB v2.0 Compliance and Compatibility ............................................................................................ 31
8 Serial Peripheral Interface (SPI)................................................................................................................. 32
9 PCM Codec Interface ................................................................................................................................. 33
9.1 PCM Interface Master/Slave ............................................................................................................... 33
9.2 Long Frame Sync ................................................................................................................................ 34
9.3 Short Frame Sync ............................................................................................................................... 34
9.4 Multi-slot Operation ............................................................................................................................. 35
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