EtronTech
EM636165-XXI
1M x 16 SDRAM
Timing Waveforms
Figure 1. AC Parameters for Write Timing
(Burst Length=4, CAS# Latency=2)
T0 T 1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T 11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22
CLK
tCK2
tCL
tCH
tIS
tIH
Begin AutoPrecharge
Bank A
Begin AutoPrecharge
Bank B
CKE
CS#
tIS
tIS
RAS#
CAS#
WE#
A11
tIH
RBx
RBx
RAy
RAy
RAz
RAz
RBy
RBy
RAx
A10
tIS
A0-A9
CAx
CBx
RBx
CAy
DQM
DQ
tDAL
tRCD
tIS
tWR
tRC
Ax0 Ax1 Ax2
tRP
tRRD
tIH
Hi-Z
Ax3 Bx0 Bx1 Bx2 Bx3 Ay0 Ay1 Ay2 Ay3
Activate
Write with
Activate
Write with
Activate
Write
Command
Bank A
Precharge
Activate
Activate
Command
Bank B
Command AutoPrecharge Command AutoPrecharge Command
Command Command
Bank A
Command
Bank A
Bank B
Command
Bank B
Bank A
Bank A
Bank A
Preliminary
21
Rev. 1.1 Apr. 2005
ETRON [ ETRON TECHNOLOGY, INC. ]
