Hynix HMT351U7CFR8A-PBT0 Benutzerhandbuch

VSEH

Single-ended high level for strobes

(VDD / 2) + 0.175

Note 3

V

1,2

Single-ended high level for Ck, CK

(VDD /2) + 0.175

Note 3

V

1,2

VSEL

Single-ended low level for strobes

Note 3

(VDD / 2) - 0.175

V

1,2

Single-ended low level for CK, CK

Note 3

(VDD / 2) - 0.175

V

1,2

1. For CK, CK use VIH/VIL (ac) of ADD/CMD; for strobes (DQS, DQS, DQSL, DQSL, DQSU, DQSU) use VIH/VIL (ac) 

of DQs.

2. VIH (ac)/VIL (ac) for DQs is based on VREFDQ; VIH (ac)/VIL (ac) for ADD/CMD is based on VREFCA; if a reduced 

ac-high or ac-low level is used for a signal group, then the reduced level applies also here.

3. These values are not defined; however, the single-ended signals Ck, CK, DQS, DQS, DQSL, DQSL, DQSU, DQSU 

need to be within the respective limits (VIH (dc) max, VIL (dc) min) for single-ended signals as well as the limita-
tions for overshoot and undershoot. Refer to "" on page 28.