ic42s16400 ETC-unknow, ic42s16400 Datasheet - Page 21

• Manufacturer Part Number: ic42s16400
• Description: 1m X 16bit X 4 Banks 64-mbit Sdram
• Manufacturer: ETC-unknow

IC42S16400
Write with Auto Precharge
During a write cycle, the auto precharge starts at the timing that is equal to the value of t
input to the device.
WRITE with AUTO PRECHRGE
In summary, the auto precharge cycle begins relative to a reference clock that indicates the last data word is valid. In the
table below, minus means clocks before the reference; plus means clocks after the reference.
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
Remark WRITA means WRITE with AUTO Precharge
CAS latency = 2
DQ
CLK
Command
Command
CAS latency = 3
DQ
CAS
CAS
CAS
CAS
CAS latency
T0
WRITA B
WRITA B
DB0
DB0
2
3
T1
DB1
DB1
T
Read
2
-1
-2
DB2
DB2
T3
+ t
+ t
DB3
DB3
DPL
DPL
AUTO PRECHARGE starts
AUTO PRECHARGE starts
Write
t
t
DPL
DPL
((min.)
((min.)
T4
T5
DPL
(min.) after the last data word
T6
Hi - Z
Hi - Z_
Burst lengh = 4
T7
T8
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