EM638165 Etron Technology Inc., EM638165 Datasheet - Page 43

• Manufacturer Part Number: EM638165
• Description: 4Mega x 16 Synchronous DRAM (SDRAM)
• Manufacturer: Etron Technology Inc.

Figure 13.1. Read and Write Cycle
Preliminary
A0~A9,A11
BA0,1
RAS#
CAS#
DQM
CKE
CS#
WE#
CLK
A10
DQ
Hi-Z
T0
Command
Activate
Bank A
RAx
RAx CAx
T 1 T2
t
CK1
Command
Bank A
Read
Ax0 Ax1
T3
T4
Ax2
T5
Ax3
T6
T7
(Burst Length=4, CAS# Latency=1)
T8
T9
Command
Bank A
43
Write
CAy
DAy0DAy1
T10 T 11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22
is Masked with a
The Write Data
Zero Clock
Latency
DAy3
Command
CAz
Bank A
Read
Az0
is Masked with a
The Read Data
Az1
Two Clock
Latency
Rev 0.6
Az3
EM638165
Precharge
Command
Bank B
Feb. 2001