RF MODULE INTERFACING

SERIAL/PARALLEL COMMUNICATION

Serial Communication

Parallel Communication

1. One data bit is transceived at a time

1. Multiple data bits are transceived at a time

2. Slower 2. Faster

3. Less number of cables required to transmit data

3. Higher number of cables required

RF MODULE PIN CONFIGURATION(TRANSMITTER)

Pin No. Name Function

1 GND Ground (0V)

2 DATA Serial Data Input

3 VCC Supply Voltage (5V)

4 ANT Antenna Output

RF MODULE PIN CONFIGURATION(RECEIVER)

Pin No. Name Function

1 GND Ground (0V)

2 Data Serial Data Output

3 Data (NC) Serial Data Output (No Connection)

4 Vcc Supply Voltage (5V)

5 Vcc Supply Voltage (5V)

6 GND Ground (0V)

7 GND Ground (0V)

8 ANT Antenna Input

HT12E (PIN DESCRIPTION)

Pin No.

Pin Name Description

1-8 A0 ~A7 Input pins for Address settings

9 VSS Negative power supply, ground

10-13 AD8~AD11

Input pins for data D8~D11 setting and transmission enable, active low (These pins should be externally set to VSS or left open)

14 TE Transmission enable, active low

16 OSC1 Oscillator input pin

15 OSC2 Oscillator output pin

17 DOUT Encoder data serial transmission output

18 VDD Positive power supply

HT12D (PIN CONFIGURATION)

Pin No.

Pin Name Description

1-8 A0 ~A7 Input pins for Address settings

9 VSS Negative power supply, ground

10-13 D8~D11 Output data pins, power-on state is low.

14 DIN Serial data input pin

16 OSC1 Oscillator input pin

15 OSC2 Oscillator output pin

17 VT Valid transmission, active high

18 VDD Positive power supply

+9 Volts

Ground

Microcontroller

Encoder

RF Transmitter

Input

RF Receiver

Decoder

Microcontroller

Output

RF CAR

Input

Encoder

RF Transmitter RF Receiver

Decoder

Motor Driver

Output (To Motors)