參數(shù)資料
型號(hào)： UPD46128953-X
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(dòng)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(yè)數(shù)： 10/60頁(yè)
文件大?。?/td> 468K
代理商： UPD46128953-X
Preliminary Data Sheet M17506EJ1V1DS
10
μ
PD46128953-X
1. Initialization
Initialize the
μ
PD46128953-X at power application using the following sequence to stabilize internal circuits.
(1) Following power application, make CE2 HIGH after fixing CE2 to LOW for the period of t
VHMH
.
Make /CE1 HIGH before making CE2 HIGH.
(2) /CE1 and CE2 are fixed HIGH for the period of t
MHCL
.
Normal operation is possible after the completion of initialization.
Figure 1-1. Initialization Timing Chart
/CE1 (Input)
V
DD
CE2 (Input)
t
MHCL
Initialization
t
CHMH
t
VHMH
V
DD
(MIN.)
Normal Operation
Cautions 1. Make CE2 LOW when starting the power supply.
2. t
VHMH
is specified from when the power supply voltage reaches the prescribed minimum value
(V
DD
(MIN.)).
Initialization Timing
Parameter
Symbol
MIN.
MAX.
Unit
Power application to CE2 LOW hold
t
VHMH
50
μ
s
/CE1 HIGH to CE2 HIGH
t
CHMH
0
ns
Following power application CE2 HIGH hold to /CE1 LOW
t
MHCL
300
μ
s
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