HY5DU281622ET
WRITE MASK TRUTH TABLE
/CS, /RAS,
/CAS, /WE
A8/
AP
ADDR
Note
Function
Data Write
CKEn-1
CKEn
DM
BA
H
H
X
X
X
X
L
X
X
1,2,3
1,2,3
Data-In Mask
H
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
IHmin ~ VILmax
V
Rev. 0.5 / Jan. 2005
8