Specifications

3
Contents:
1. Ordering Information ...................................................................................9
2. Block Diagram and Descriptions .................................................................10
3. Electrical Characteristics ............................................................................12
3.1 Radio Characteristics – Basic Data Rate ........................................................ 17
3.2 Radio Characteristics – Enhanced Data Rate ..................................................18
4. WT32 Pin Description .................................................................................19
4.1 Device Terminal Functions .......................................................................... 20
5. Power Control ............................................................................................26
5.1 Power Supply Configuration ........................................................................26
5.2 Voltage Regulator Enable Pin....................................................................... 26
5.3 Battery Charger ........................................................................................27
5.4 RESET .....................................................................................................28
6. Serial Interfaces......................................................................................... 30
6.1 UART Interface..........................................................................................30
6.1.1 UART Configuration While RESET is Active ............................................... 32
6.1.2 UART Bypass Mode...............................................................................32
6.2 USB Interface ...........................................................................................33
6.2.1 USB Pull-Up Resistor ............................................................................33
6.2.2 Self Powered Mode...............................................................................33
6.2.3 Bus Powered Mode ............................................................................... 34
6.2.4 Suspend Current..................................................................................35
6.2.5 Detach and Wake-Up Signaling .............................................................. 35
6.2.6 USB Driver.......................................................................................... 36
6.2.7 USB 1.1 Compliance ............................................................................. 36
6.2.8 USB 2.0 Compatibility........................................................................... 36
6.3 SPI Interface ............................................................................................ 37
7. Audio Interfaces......................................................................................... 38
7.1 Audio Interface .........................................................................................38