HY5DU281622ETP-25 Datasheet, PDF (8/34 Pages) Hynix Semiconductor – 128M(8Mx16) gDDR SDRAM

WRITE MASK TRUTH TABLE
Function
Data Write
Data-In Mask
CKEn-1 CKEn
H
X
H
X
/CS, /RAS,
/CAS, /WE
X
X
1HY5DU281622ETP
DM
ADDR
A8/
AP
BA
Note
L
X
1,2,3
H
X
1,2,3
Note :
1. Write Mask command masks burst write data with reference to UDQS/LDQS and it is not related with read data.
2. LDM corresponds to the data on DQ0-Q7 and UDM corresponds to the data on DQ8-Q15
3. In here, Don’t Care means logical value only, it doesn’t mean ’Don’t care for DC level of each signals’. DC level should be out of
V_IHmin ~ V_ILmax
Rev. 1.0 / Oct. 2005
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