F2M03C2001 datasheet(27/46 Pages) ETC2

27 / 46 page

Rev: 13 September 2005

Class 2 Bluetooth module - F2M03C2

Datasheet

6.2.6

Suspend Current

USB devices that run off VBUS must be able to enter a suspended state, whereby they consume less that

0.5mA from VBUS. The voltage regulator circuit itself should draw only a small quiescent current (typically

less than 100µA) to ensure adherence to the suspend-current requirement of the USB specification. This is

not normally a problem with modern regulators. Ensure that external LEDs can be turned off by F2M03. The

entire circuit must be able to enter the suspend mode.

6.2.7 Detach and Wake_Up Signalling

F2M03 can provide out-of-band signalling to a host controller by using the dedicated control lines called

‘USB_DETACH’ and ‘USB_WAKE_UP’. These are outside the USB specification (no wires exist for them

inside the USB cable), but can be useful when embedding F2M03 into a circuit where no external USB is

visible to the user. Both control lines are shared with PIO pins and can be assigned to any PIO pin by

firmware settings (contact Free2move)

USB_DETACH, is an input which, when asserted high, causes F2M03 to put USB_D- and USB_D+ in a

high-impedance state and to 1.5kO pull-up resistor on USB_D+. This detaches the device from the bus and

is logically equivalent to unplugging the device. When USB_DETACH is taken low, F2M03 will connect

back to USB and await enumeration by the USB host.

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 proper), and cannot be sent while F2M03 is effectively

disconnected from the bus.

USB_DETACH and USB_WAKE_UP Signal

6.2.8 USB Driver

A USB Bluetooth device driver is required to provide a software interface between F2M03 and Bluetooth

applications running on the host.

Page 27(46)

F2M03C2001 데이터시트(PDF) 27 Page - List of Unclassifed Manufacturers