bc41b143a07 ETC-unknow, bc41b143a07 Datasheet - Page 68

• Manufacturer Part Number: bc41b143a07
• Description: Single Chip Bluetooth
• Manufacturer: ETC-unknow

USB_WAKE_UP is an active high output (used only when USB_DETACH is active) to wake up the host and allow USB
communication to recommence. It replaces the function of the software USB WAKE_UP message (which runs over
the USB cable) and cannot be sent while BlueCore4-ROM is effectively disconnected from the bus.
9.5.8
A USB Bluetooth device driver is required to provide a software interface between BlueCore4-ROM and Bluetooth
software running on the host computer. Suitable drivers are available from http://www.csrsupport.com.
9.5.9
BlueCore4-ROM is qualified to the USB Specification v1.1, details of which are available from http://www.usb.org. The
specification contains valuable information on aspects such as PCB track impedance, supply inrush current and
product labelling.
Although BlueCore4-ROM meets the USB specification, CSR cannot guarantee that an application circuit designed
around the chip is USB compliant. The choice of application circuit, component choice and PCB layout all affect USB
signal quality and electrical characteristics. The information in this document is intended as a guide and should be read
in association with the USB specification, with particular attention being given to Chapter 7. Independent USB
qualification must be sought before an application is deemed USB compliant and can bear the USB logo. Such
qualification can be obtained from a USB plugfest or from an independent USB test house.
Terminals USB_DP and USB_DN adhere to the USB Specification v2.0 (Chapter 7) electrical requirements.
9.5.10 USB 2.0 Compatibility
BlueCore4-ROM is compatible with USB v2.0 host controllers; under these circumstances the two ends agree the
mutually acceptable rate of 12Mbits/s according to the USB v2.0 specification.
CS-101564-DSP12
USB Driver
USB 1.1 Compliance
Figure 9.13: USB_DETACH and USB_WAKE_UP Signal
Production Information
© CSR plc 2003-2007
Device Terminal Descriptions
Page 68 of 97