每一個組N啟動捩遁定值選擇一個靈活邏輯操作數(shù),當設定后這個操作數(shù)時將使得特定的定值組可以被任何元件組激活使用。優(yōu)選方案確保在一個給定的時間內(nèi)只有-組是活動的蜒組的編號越高優(yōu)先級也越高。對于第-組沒有激活定值(默認活動組),由于當沒有其它組被激活時
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