Data Sheet

FSC-BT806BDatasheet

Shenzhen Feasycom Technology Co.,Ltdwww.feasycom.com

-19-

USB suspend modes and Bluetooth low-power modes:

 Global suspend

 Selective suspend, includes remote wake

 Wake on Bluetooth, includes permitted devices and set-up prior to selective suspend

 Suspend mode current draw

 PIO status in suspend mode

 Resume, detach and wake PIOs

Battery charging from USB, which describes dead battery provision, charge currents, charging in suspend modes

and USB VBUS voltage consideration

USB termination when interface is not in use

Internal modules, certification and non-specification compliant operation

4.7LED Drivers

FSC-BT806B includes a 3-pad synchronised PWM LED driver for driving RGB LEDs for producing a wide rangeof colours.

All LEDs are controlled by firmware.

The terminals are open-drain outputs, so the LED must be connected from a positive supply rail to the pad in serieswith

a current-limiting resistor.

Figure 8: LED Equivalent Circuit

If a known value of current is required throughthe LED to give a specific luminous intensity, then the value of R

LED

calculated.

ILED=

VDD-VF

RLED+RON

For the LED pads to act as resistance, the external series resistor, R

LED

, needs to be such that the voltage dropacross it,

, keeps V

PAD

below 0.5V.

VDD=V

PAD