5.1 TDC7201EVM Connections

1. If you haven’t done so, connect the USB cable from the MSP430 Launch Pad to your PC.
2. If you haven't done so, connect the TDC7201EVM to the MSP430 Launch Pad via J1 and J2 as shown in Figure 6.
3. Setting the Dual Channel Function Generator:
   1. Set channel 1 of the dual function generator to the following (see Figure 5):
      1. Pulse 1-Cycle
      2. Burst mode
      3. Freq = 40 kHz
      4. Delay = 0 s
      5. Amplitude = 3.3 Vpp
      6. Offset = 1.65 V
      7. Duty = 20%
      8. Burst Trigger Source = External
   2. Set channel 2 of the dual function generator to the following (see Figure 5):
      1. Pulse 1-Cycle
      2. Burst mode
      3. Freq = 40 kHz
      4. Delay = 19 µs --> this is the time-of-flight (TOF)
      5. Amplitude = 3.3 Vpp
      6. Offset = 1.65 V
      7. Duty = 20%
      8. Burst Trigger Source = External
   Figure 5. START and STOP Signals Scope Shot
4. Connecting the Input Signal:
   1. Using a USB-to-SMA cable, connect channel 1 of the dual function generator to TDC7201EVM’s START1_EXT connector (J5).
   2. Using a USB-to-SMA cable, connect channel 2 of the dual function generator to TDC7201EVM’s STOP1_EXT connector (J4). See Figure 6.
5. Connecting the Trigger Input:
   1. Connect DTG_TRIG (TP9) to the TRIGG input of the dual function generator. DTG_TRIG is generated by the MCU whenever a new measurement is started by the TDC7201. See Figure 6 and Figure 7.
Figure 6. TDC7201EVM Connection Setup
Figure 7. Tektronix AFG3102 Connections