Lattice Semiconductor ispClock5400D User Manual page 6

Lattice Semiconductor
9. If the board is not programmed with the demo project yet, press the Download icon on the top toolbar.
Figure 4. PAC-Designer Top Toolbar
The Frequency Summary dialog appears and reports the Reference and VCO frequency settings.
Figure 5. Frequency Summary Dialog Box
10. Click OK.
PAC-Designer reprograms the evaluation board with the updated JEDEC programming file.
11. Attach high-speed scope leads to the SMA sockets at BANK0 P, N and BANK2 P, N.
12. Set the scope input channel settings to 50 Ohm termination.
For this mode, we use LVDS and the 50 Ohm termination on each scope channel.
The waveforms shown are using 3' long RG-316 cables with the SMA connectors. If the equipment has high
impedance probes or a differential probe, make sure that the LVDS BANK outputs have 100 Ohm termination
from BANK_P to BANK_N.
When operating properly, you should see four waveforms on the scope as shown in Figure 6. This represents
BANK0 and BANK2 output waveforms for both the BANK_P and BANK_N on each respectively. BANK0_P,N
are shown on the top pair, BANK2_P,N are shown on bottom pair. The full differential output would equal:
[BANK0_P minus BANK0_N] as well as on BANK2.
See the tables in the schematic (Appendix A) showing termination resistor options.
ispClock5400D Evaluation Board
6
User's Guide