cyclone v 調試DDR3L時出現SEQ.C: CALIBRATION FAILED

板子使用的DDR3是MT41K256M16TW-107AATP。根據手冊設置完時序參數後,運行時出現: SEQ.C: CALIBRATION FAILED SEQ.C: Calibration Summary SEQ.C: Calibration Failed SEQ.C: Error Stage   : 1 - VFIFO SEQ.C: Error Substage: 1 - GUARANTEE
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