... clock cycle7) Bi-directional, differential data strobe (DQS) is transmitted/received with data, to be used in capturing data at the receiver8 ... (CK and CK)11) DLL aligns DQ and DQS transitions with CK transitions12) Commands entered on each positive CK edge: data ... , like HY,Samsung, Elpida, etc. When new IC chipsets are received, we randomlychose samples for test, approximately 10% to 20% ratio ...