1.3.3. The ICE extension unit

The ICE Extension Unit (IEU) is a logic block that can be added to the EmbeddedICE logic when a processor is fabricated. The IEU extends the number of hardware breakpoint units available to the debugger using extra comparators and an extra JTAG scan chain. It is available in different sizes, providing up to 30 additional units. Multi-ICE supports the logic automatically on processors that include it.

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