EM482M3244VTA-5L Datasheet, PDF (17/33 Pages) List of Unclassifed Manufacturers – 64Mb SDRAM

64Mb SDRAM
Write with Auto Precharge
During write cycle, the auto precharge starts at the timing that is equal to the value of
the tDPL( min.) after the last dataword input to the device.
CLK
0
1
2
3
4
5
6
7
8
Command ( CL= 2 )
Write AP
Auto precharge starts
DQ ( CL= 2 )
D1
D2
D3
D4
Hi-Z
tDPL( min. )
Command ( CL= 3 )
Write AP
Auto precharge starts
DQ ( CL= 3 )
Hi-Z
D1 D2
D3
D4
tDPL( min. )
BL=4
( tRAS must be satisf ied )
Remanks: Write AP means Write with auto precharge
In summary, the auto precharge begins relative to a reference clock that indicates
the last data word is valid. In the following table minus means clocks before the
reference ,plus means after the reference.
/CAS latency
2
3
Read
-1
-2
Write
+ tDPL( min.)
+ tDPL ( min.)
Rev.01
17/33