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 13 of 19

The SPI unit supports generic SPI Interface protocols as detailed in the following sections. The design

is capable of 50 MHz operation. The interface supports the following functionality:

x SPI unit bus device operation

x SPI unit register read / write

x Interrupt generation to internal CPU

x Interrupt generation to the SPI unit host

x DMA to internal memories

x Wake Interrupt to the Power Management Unit

8 Bluetooth External Interfaces

W2CBW003 supports UART, USB, PCM and SPI interfaces for Bluetooth.

8.1 UART Interface

W2CBW003 UART interface provides a simple mechanism for communicating with other serial devices

using the RS232 standard. Four signals are used to implement the UART function:

x BT_UART_TX

x BT_UART_RX

x BT_UART_RTS

x BT_UART_CTS

When W2CBW003 is connected to another digital device, BT_UART_RX and BT_UART_TX transfer

data between the two devices. The remaining two signals, BT_UART_CTS and BT_UART_RTS, can

be used to implement RS232 hardware flow control where both are active low indicators. UART

configuration parameters, such as Baud rate and packet format, are set using W2CBW003 PS keys.

To communicate with the UART at its maximum data rate using a standard PC, an accelerated serial

port adapter card is required for the PC. An external RS232 transceiver chip is also needed.

Table 4: UART Baud Rates