HY5DU561622FLTP-5I Datasheet, PDF (8/28 Pages) Hynix Semiconductor – 256M(16Mx16) DDR SDRAM

1HY5DU561622FTP-5I
HY5DU561622FTP-4I
WRITE MASK TRUTH TABLE
Function
CKEn-1 CKEn /CS, /RAS, /CAS, /WE LDM
UDM
ADDR
A10/
AP
BA
Note
Data Write
H
X
X
L
L
X
1,2
Data-In Mask
H
X
X
H
H
X
1,2
Lower Byte Write /
Upper Byte-In Mask
H
X
X
L
H
X
1,2
Upper Byte Write /
Lower Byte-In Mask
H
X
X
H
L
X
1,2
Note :
1. Write Mask command masks burst write data with reference to LDQS/UDQS(Data Strobes) and it is not related with read data.
2. LDM and UDM control lower byte(DQ0~7) and Upper byte(DQ8~15) respectively.
Rev. 1.1 / Mar. 2008
8