F2M03GLA datasheet(33/44 Pages) ETC2

33 / 44 page

Rev: b

Low power Bluetooth

™ Module with antenna- F2M03GLA

Datasheet

6.7

Power supply

The power supply for the F2M03GLA should be chosen carefully. Bad power supply can reduce the

performance and may damage the module. Please use the recommended voltage regulator or consult

Free2move if using another regulator. It is also essential to use a proper reset circuit to the module for

correct operation.

6.7.1

Voltage regulator

The F2M03GLA has one power supply, +VCC.

The voltage supplied should have low noise, less than 10mV rms between 0 and 10MHz. The transient

response of the regulator is also important. At the start of a Bluetooth packet, power consumption will jump

to high levels. The regulator should have a response time of 20µs or less; it is essential that the power rail

recovers quickly.

The recommended voltage regulator is:

TPS73633DBVTG4 from Texas Instrument

6.7.2

Reset

The F2M03GLA has an active low reset (pin nr: 30).The reset pin MUST be connected to either a reset-

circuit such as the TC1270SERCTR, TCM811SERCTR, DS1818 or using an I/O from a microcontroller.

Reset cannot be done with a R-C network. It is recommended to used one of the reset circuits mentioned

above. Special considerations must be taken when using an I/O from a microcontroller; a pull-down resistor

(1.8k

Ω) must be placed on the I/O-line.

It is recommended that RESET is applied for a period greater than 5ms.

At reset the digital I/O pins are set to inputs for bi-directional pins and outputs are tristated. The PIOs have

weak pull-downs.

Page 33(44)

F2M03GLA Datasheet(PDF) 33 Page - List of Unclassifed Manufacturers