F2M03GLA datasheet(22/44 Pages) ETC2

22 / 44 page

Rev: b

Low power Bluetooth

™ Module with antenna- F2M03GLA

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. 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- and USB+ in a high-

impedance state and turns off the pull-up resistor on USB+. 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 22(44)

F2M03GLA Datasheet(PDF) 22 Page - List of Unclassifed Manufacturers