Firelinx Inc FLNXRF1 Manual Do Utilizador

The schematic (below) shows the electrical connections to the module when installed on 
a host circuit board. The reset chip is optional. The reset line to the module could also be 
driven from a processor or other circuitry on the host board. 
 

RFMDM_I/O

+3.0 to +3.3V (max)

REGULATED 3.0 to 3.3VDC

RFMDM_P0_1

RFMDM_P0_6

RFMDM_P0_5

RFMDM_P0_7

RFMDM_P11

RFMDM_P10

RFMDM_TX

RFMDM_RX

RFMDM_P0_0

U1

OPEN DRAIN RESET CHIP

VDD

2

VSS

3

/RST

1

C1

0.1uF

+

C2

10uF - 47uF

MOD1

2.4 GHZ RF MODEM

3VDC

1

GND

2

RESET_N

3

P2_4

4

P2_3

5

P1_6

6

P1_7

7

P1_5

8

P2_0

9

P1_4

10

P1_3

11

P1_2

12

P0_0

13

P0_4

14

P0_3/TXD

15

P0_2/RXD

16

P0_1

17

P2_1/DD

18

P2_2/DC

19

P0_5

20

P1_0

24

P1_1

23

P0_7

22

P0_6

21

GND1

25

GND2

26

GND3

27

GND4

28

R1

10K 0603

1

2

/RFMDM_RESET

 

 
When mounting the module on a mother-board, provision must be made for the 4 ground 
legs of the SMA connector and the center conductor which protrude from the bottom of 
the module by 0.1” as shown. This can be accommodated in one of two ways: 
 

1.  The bottom edge of the module can be mounted so that it over-hangs off the edge 

of the mother-board by 0.32” 

2.  Clearance holes can be made in the mother-board to allow these 5 mounting legs 

to protrude through the mother-board. If the latter technique is used an unplated 
hole should be used for the center conductor, and a minimum clearance of 0.2” 
should be provided around this conductor on all layers of the mother-board. The 4 
ground legs of this connector may use plated or unplated clearance holes in the 
mother-board and may optionally be connected to the mother-board ground. 

 
The PCB LAN pattern used on the mother-board should provide one SMT pad for each 
of the 28 pads on the module. The extra ground pads (pin 25,26,27, and 28) may 
optionally be left unconnected. SMT pad size is 0.070” x 0.125”.