User Instructions

Stollmann

E + V GmbH

BlueRS+I

DesignGuide

Author: cl Date of Savin

: 19.03.04 Ref: Revision: 1.2 Pa

e 15 of 22

5.5 Power Supply

There are two variants of supplying power to the BlueRS+I:

• 5 VDC+– 10%, the voltage is regulated on the BlueRS+I (linear regulator). The

regulator is temperature and overcurrent protected.

• 3,3 V +- 2% low noise, the supply voltage is directly used (0 Ohm)

The power supply voltage can be switched as follows. The linear regulator needs to

be replaced by an 0 Ohm resistor.

5.6 Power consumption and power down modes

To reduce power consumption of the BlueRS+I power down modes can be activated

automatically by the BlueRS+ (controlled by parameter settings).

If no Bluetooth connection is established, the following states are implemented, the

activation of these states can be controlled by the parameter bpsm and pwd.

For more details please refer to the BlueRS+I manual.

5.6.1 Deep Sleep state

The Bluetooth RF is completely deactivated, no paging requests from other

Bluetooth devices will be recognized. Only rising control line DTR will activate the

BlueRS+I and may initiate a Bluetooth link dependent on other parameters.

Note: In Deep Sleep state the AT command set is not active, CTS line is low.

5.6.2 Power down state

The Bluetooth RF is activated every 1.25 seconds, paging requests from other

Bluetooth devices will be recognized after that intervals and accepted if allowed.

Additionally rising control line DTR will activate the BlueRS+I and may initiate a

Bluetooth link dependent on other parameters.

Note: In Power down state the AT command set is not active, CTS line is low.

Line regulator 0 Ohm resistor

5 V

supply

3,3 V

supply

Linear regulator IC

removed