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MSP430F5529, USB升级 ,必须再重启的时候,PUR为高吗?

Other Parts Discussed in Thread: MSP430F5529, MSPBSL

MSP430F5529, USB升级 ,必须再重启的时候,PUR为高吗?

这样是否意味着设备必须设置个按键,用户升级的时候按住? 否则无法USB升级