User Manual For Cyclone LC Programmers 33
Figure 3-22: Communications Mode Selection
3.18.8.2.1 High-Performance Communications (FX ONLY)
If high-performance options are available for the selected device they will appear in the “Shift
Frequency in MHz” drop-down. Cyclone FX programmers are capable of high-performance
communications when using certain ARM Cortex targets in SWD mode.
Note: Cyclone LC programmers cannot currently take advantage of high-performance options, although
the frequencies appear in the display.
Figure 3-23: High-Performance Options (FX ONLY)
3.19 Ribbon Cable
Cyclone LC programmers communicate with the target through ribbon cables. The ribbon cables
for standard debug connectors have a 0.100-inch centerline dual row socket IDC assembly (not
keyed). The ribbon cables for 10- and 20-pin mini debug connectors have a 0.050-inch centerline
dual row socket IDC assembly (keyed). The ribbon cables are designed such that the Cyclone’s
Debug Connector has the same pinout as the Target Header, i.e., Pin 1 of the Cyclone’s Debug
Connector is connected to Pin 1 of the Target Header. As an example, Figure 3-24 sketches the
connection mechanism (looking down into the sockets) for a 14-pin ribbon cable. Ribbon cables for
other supported architectures use a similar scheme, but may have more or fewer pins.
Figure 3-24: Ribbon Cable Example Diagram, When Looking Into IDC Socket
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