em636165 Etron Technology Inc., em636165 Datasheet - Page 25

• Manufacturer Part Number: em636165
• Description: 1m X 16 Bit Synchronous Dram Sdram
• Manufacturer: Etron Technology Inc.

Figure 4. Power on Sequene and Auto Refresh (CBR)
Etron Confidential
CLK
CKE
CS#
RAS#
CAS#
WE#
A11
A10
A0-A9
DQM
DQ
Note(*):The Auto Refresh command can be issue before or after Mode Register Set command
Hi-Z
Inputs must be
Stable for 200 µs
T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10
High Level
is reauired
Precharge All
Command
t
CK
t
RP
Mode Register
Set Command
Address Key
1st Auto Refresh
Command
Minimum fo 2 Refresh Cycles are required
(*)
25
T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22
2nd Auto Refresh
Command
(*)
t
RC
Any
Command
Rev. 3.4
EM636165
“H” or “L”
Apr. 2008