EM636327Q-7 Etron Technology Inc., EM636327Q-7 Datasheet - Page 28

• Manufacturer Part Number: EM636327Q-7
• Description: 512K x 32 High Speed Synchronous Graphics DRAM(SGRAM)
• Manufacturer: Etron Technology Inc.

Figure 5. Self Refresh Entry & Exit Cycle
Note: To Enter SelfRefresh Mode
1. CS#, RAS# & CAS# with CKE should be low at the same clock cycle.
2. After 1 clock cycle, all the inputs including the system clock can be don't care except for CKE.
3. The device remains in SelfRefresh mode as long as CKE stays "low".
Note: To Exit SelfRefresh Mode
4. System clock restart and be stable before returning CKE high.
5. Enable CKE and CKE should be set high for minimum time of t
6. CS# starts from high.
7. Minimum t
8. 2048 cycles of burst AutoRefresh is required before SelfRefresh entry and after SelfRefresh exit if the
Preliminary
A0 - A 9
CA S#
RAS#
Clock
DQM
WE#
CKE
CS#
DSF
Once the device enters SelfRefresh mode, minimum t
system uses burst refresh.
DQ
BS
T0
*Note 8
Self Refresh Enter
RC
T1
*Note 1
is required after CKE going high to complete SelfRefresh exit.
t
IS
Hi-Z
T2
*Note 2
T3
T4
T5
T6
*Note 3
T7
T8
T9
28
T10
Hi-Z
RAS
*Note 4
SelfRefresh Exit
is required before exit from SelfRefresh.
T11
*Note 5
t
*Note 6
SRX
T12
SRX
t
RC(min)
.
T13
T14
*Note 7
T15
AutoRefresh
*Note 8
T16
t
PDE
EM636327
T17
December
T18
T19
1998