Specifications

11
USB
The USB interface is a full speed Universal Serial Bus (USB) interface for communicating
with other compatible digital devices. WT32 acts as a USB peripheral, responding to
requests from a Master host controller such as a Personal Computer (PC).
Synchronous Serial Interface
This interface is a synchronous serial port interface (SPI) for interfacing with other digital
devices. The SPI port can be used for system debugging. It can also be used for
programming the Flash memory.
UART
This interface is a standard Universal Asynchronous Receiver Transmitter (UART) interface
for communicating with other serial devices.
PCM / I
2
S / SPDIF Interface
This interface is a bi-directional serial programmable audio interface supporting PCM, I2S
and SPDIF formats.
Audio Interface
The audio interface of WT32 has fully differential inputs and outputs and a microphone
bias output. A high-quality stereo audio Bluetooth application can be implemented with
minimum amount of external components.
Programmable I/O
WT32 has a total of 10 digital programmable I/O terminals. These are controlled by the
firmware running on the device.
Reset
WT32 has a reset circuitry that is used to reset the module in the startup to ensure proper
operation of the flash memory. Alternatively, the reset can be externally driven by using a
WT32 reset pin.
802.11 Coexistence Interface
Dedicated hardware is provided to implement a variety of coexistence schemes. Channel
skipping AFH (Adaptive Frequency Hopping), priority signaling, channel signaling, and host
passing of channel instructions are all supported. The features are configured in firmware.
Since the details of some methods are proprietary (e.g. Intel WCS), please contact
Bluegiga Technologies for details.