EM639165 Etron Technology Inc., EM639165 Datasheet - Page 28

• Manufacturer Part Number: EM639165
• Description: 8Mega x 16bits SDRAM
• Manufacturer: Etron Technology Inc.

Preliminary
DQM CONTROL
DQM is a dual function signal defined as the data mask for
writes and the output disable for reads. During writes, DQM(U,L)
masks input data word by word. DQM(U,L) to write mask latency
Command
DQM
CLK
DQ
Write
D0
masked by DQM(U,L)=H
D2
DQM Function(CL=3)
D3
28
READ
is 0. During reads, DQM(U,L) forces output to Hi-Z word by word.
DQM(U,L) to output Hi-Z latency is 2.
Q0
disabled by DQM(U,L)=H
Q1
Rev 1.0
EM639165
Q3
Feb. 2001