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MSP430F6638: 内DVCC是否都联通?

Part Number: MSP430F6638

MSP430F6638每一个DVCC引脚是否都需要接电源,AVCC呢和AVSS呢?  它们在芯片内部是否是连通的?   如果有几个AVCC或DVCC不连接,芯片是否还可以正常使用?