User's Guide

PRO-FLEX TRANSCEIVER MODULES

USER’S GUIDE

The information in this document is subject to change without notice.

Confirm the data is current by downloading the latest revision from www.lsr.com.

Figure 5 Transmitter PERT Tab

2.7 Ping-Pong Test

To perform the ping-pong test (without the use of the ModFLEX Development Board),

the Pro-FLEX module will require external hardware connections. A nominal 3.3 volt DC

power supply should be connected to the 3V3DC pin shown in Figure 1. Also, a ground

connection is required. Also, 4 LEDs should be connected to pins TMR/PWM1 through

TMR/PWM3. The cathode of each LED should be each pin. The anode of each LED

should be connected to the 3.3 V power supply through a nominal resistor value of 470

ohms. Each output can sink up to 15 mA to turn on each LED. The outputs are set to

high strength mode in the firmware. The TMR/PWM1 output should have a green LED.

The TMR/PWM2 output should have a yellow LED.

The TMR/PWM5 pin is configured as an input to initiate the ping-pong test mode. This

pin should be connected to ground through a momentary contact normally open (NO)

push button switch. This switch is referred to as the user button in the subsequent

instructions. Also, the RESET pin should be connected to ground through a momentary

contact normally open (NO) push button switch. This switch is referred to as the reset

button in the subsequent instructions.