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TMS320C6678: EMU02-EMU18是否有必要引出呢?

Part Number: TMS320C6678

工程师您好!

参考EVM6678的设计,看到JTAG只使用到EMU00、EMU01,但EMU02-EMU18还是有引出到其它座子;

请问EMU02-EMU18有什么作用,是否有必要保留引出呢?

感谢!