EM638165 Etron Technology Inc., EM638165 Datasheet - Page 22

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

Figure 4. Power on Sequene and Auto Refresh (CBR)
Preliminary
A0-A9,A11
BA0,1
RAS#
CAS#
DQM
CKE
CS#
WE#
CLK
A10
DQ
Hi-Z
stable for 200 s
Inputs must be
T0
PrechargeALL
High level
is reauired
T 1 T2
Command
t
CK2
t
RP
Mode Register
Set Command
Address Key
T3
T4
1st AutoRefresh
Command
T5
T6
Minimum of 2 Refresh Cycles are required
T7
T8
T9
22
T10 T 11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22
2nd Auto Refresh
Command
t
RC
Command
Any
Rev 0.6
EM638165
Feb. 2001