2 SWJ interconnect

The css600_swjic is a Serial Wire and JTAG interconnect that enables you to connect multiple SWJ slave components, for example Debug Ports, to a single SWJ master.

Use the css600_swjic to:

  • Daisy-chain multiple JTAG Debug Ports.
  • Combine the data and control signals from multiple Serial Wire Multi Drop Debug Ports.

The following figure shows the external connections on the SWJIC.

Figure 2-12 css600_swjic logical connections
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Creating long JTAG scan chains can create performance issues. Arm recommends that you avoid creating long daisy-chains if possible.

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