User's Manual

Wi2Wi, Inc. Doc No. AST-PDT-DOC Rev.1.1

Data Sheet, WLAN-Bluetooth SiP– W2CBW003

Dated: October 20, 2006

The content of this document is to be treated as strictly confidential and is not to be disclosed,

reproduced or used, except as authorized in writing by Wi2Wi, Inc.

Page 14 of 19

The UART interface is capable of resetting W2CBW003 upon reception of a break signal. A break is

identified by a continuous logic low (0V) on the BT_UART_RX.

Figure 2: UART Break Signal

PS Key “PSKEY_UART_BAUD_RATE (0x204)” can be used to set the desired Baud Rate for UART.

8.2 USB Interface

W2CBW003 contains a full speed (12Mbits/s) USB interface that is capable of driving a USB cable

directly. No external USB transceiver is required. The device operates as a USB peripheral, responding

to requests from a master host controller such as a PC. Both the OHCI and UHCI standards are

supported. The set of USB endpoints implemented can behave as specified in the USB section of the

Bluetooth Specification v2.0 + EDR or alternatively can appear as a set of endpoints appropriate to USB

audio devices such as a set of USB speakers.

USB is a master/slave oriented system (in common with other USB peripherals). W2CBW003 only

supports USB slave operation.

8.3 PCM Interface

Pulse Code Modulation (PCM) is a standard method used to digitize audio (particularly voice) patterns

for transmission over digital communication channels. Through its PCM interface, W2CBW003 has

hardware support for continual transmission and reception of PCM data, so reducing processor overhead

for wireless headset applications. W2CBW003 offers a bi-directional digital audio interface that routes

directly into the baseband layer of the on-chip firmware. It does not pass through the HCI protocol layer.

Hardware on W2CBW003 allows the data to be sent to and received from a SCO connection.

Up to three SCO connections can be supported by the PCM interface at any one time.

W2CBW003 can operate as the PCM interface Master generating an output clock of 128, 256 or

512kHz. When configured as PCM interface slave it can operate with an input clock up to 2048kHz.

W2CBW003 is compatible with a variety of clock formats, including Long Frame Sync, Short Frame

Sync and GCI timing environments.

It supports 13 or 16-bit linear, 8-bit ȝ-law or A-law companded sample formats at 8ksamples/s, and can

receive and transmit on any selection of three of the first four slots following PCM_SYNC. The PCM

configuration options are enabled by setting the PS Key PS KEY_PCM_CONFIG.