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參數(shù)資料
| 型號： | UPD46128953-E15X |
| 廠商： | NEC Corp. |
| 英文描述： | 128M-BIT CMOS MOBILE SPECIFIED RAM 4M-WORD BY 32-BIT ADDRESS / DATA MULTIPLEXED EXTENDED TEMPERATURE OPERATION |
| 中文描述： | 128兆位CMOS移動指明內(nèi)存分詞由32位地址/數(shù)據(jù)復(fù)用溫度范圍 |
| 文件頁數(shù)： | 32/60頁 |
| 文件大?。?/td> | 468K |
| 代理商： | UPD46128953-E15X |
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Preliminary Data Sheet M17506EJ1V1DS
32
μ
PD46128953-X
5. 3 Read / Write Command Loading
A command (read/write) is loaded in the same timing as an address (refer to
6.2 Address Latching
). If /WE = HIGH
at that time, a read operation is started; if /WE = LOW, a write operation is started. Figure 5-5 shows a read operation
and Figure 5-6 shows a write operation. If /WE = LOW in the cycle next to that in which an address is loaded as shown in
Figure 5-7
, a write operation is not recognized. The operation in Figure 5-7 is a read operation.
Figure 5-5. Command Loading Timing 1
T0
T1
T2
H
t
CHV
t
CSV
t
CES
t
WES
t
WEH
t
CHV
CLK (Input)
/CE1 (Input)
/OE (Input)
/WE (Input)
/ADV (Input)
Command Input
Remarks 1.
Figure 5-5 shows a read operation
2.
Refer to
6. Electrical Specifications
,
7. Timing Charts
in detail of AC specification.
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