PE micro Cyclone MAX, User Manual

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Cyclone for ARM devices User Manual 21
Cyclone for ARM
®
devices
JTAG Tap Number 0
JTAG Pre IR Bits 4
To access the second, and last device in the chain (TAP #1), use the following
settings:
JTAG Tap Number 1
JTAG Pre IR Bits 0
3.13 Ribbon Cable
The Cyclone for ARM devices communicates with the target through ribbon
cables. The ribbon cable for standard 20-pin debug connectors has 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 for ARM devices Debug Connector has the same pinout as the
Target Header, i.e., Pin 1 of the Cyclone for ARM devices Debug Connector is
connected to Pin 1 of the Target Header.
Figure 3-17 sketches the connection
mechanism (looking down into the sockets) for a 14-pin ribbon cable. The 20-
and 10-pin ribbon cables use a similar scheme with more or fewer pins,
repsectively.