DS650-6 June ‘06

©2006 RF Solutions Ltd, www.rfsolutions.co.uk

Page 3

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RF650

1

Module Connections

Pin Descriptions

Pin

Number

Name

Type

Description

1

Vcc

Power

Positive supply voltage connection. Decouple with 100n ceramic

capacitor to ground.

2, 3, 4, 6

GND

Power

Connect to 0 volts.

5

Antenna

In / Out

Nominal 50 ohm input/output impedance capacitively isolated

from the internal circuit.

7, 8

nc

-

No Connection.

9

PD

In

Power Down pin. Take low for low power standby mode.

10

Tx

In

Transmit data input from host controller.

Data input to the transmitter can be directly interfaced to CMOS

logic drive operating on the same supply voltage as the

transceiver.

11

Rx

Out

Received data output to host controller (CMOS logic out)

representing true data as supplied to the transmitter.

12, 13

Data Rate

In

Host Data Rate selection.

14

Configuration

In

High for normal operation, low to configure module.

15

RTS

In

Logic ‘0’ is Request To Send.

Take low when the host is ready to send data to the module or is

ready to receive data from the module.

16

CTS

Out

Logic ‘0’ is Clear To Send.

Taken high when the module is busy.

Host Data Rate Selection

DR2 (pin 13)

DR1 (pin12)

Baud Rate

0

0

4,800

0

1

9,600

1

0

19,200

1

1

38,400

Vcc 1

GND 2

GND 3

GND 4

ANT 5

GND 6

NC 7

NC 8

16

CTS

15

RTS

14

Config

13

DR2

12

DR1

11

Rx

10

Tx

9

PD