參數(shù)資料
型號: VG36646141BT-8
廠商: Vanguard International Semiconductor Corporation
英文描述: CMOS Synchronous Dynamic RAM
中文描述: 同步動態(tài)隨機存儲器的CMOS
文件頁數(shù): 19/70頁
文件大?。?/td> 974K
代理商: VG36646141BT-8
Document : 1G5-0127
Rev2
Page 19
VIS
Preliminary VG36641641BT
CMOS Synchronous Dynamic RAM
8.2 Write with Auto Precharge
During a write cycle, the auto precharge starts at the timing that is equal to the value of t
DPL(min.)
after the last data word 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.
9.Read/Write Command Interval
CAS latency
2
Read
-1
Write
+ t
DPL(min.)
+ t
DPL(min.)
3
-2
Burst lengh = 4
CLK
Command
CAS latency = 2
DQ
Command
CAS latency = 3
DQ
Remark WRITA means WRITE with AUTO Precharge
Hi - Z
DB0
DB3
DB2
DB1
WRITA B
WRITA B
T0
T1
T
2
T3
T4
T5
T6
T7
Hi - Z_
T8
t
DPL
t
DPL
DB0
DB3
DB2
DB1
AUTO PRECHARGE starts
AUTO PRECHARGE starts
No New Command to Bank B
No New Command to Bank B
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