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參數(shù)資料
| 型號(hào)： | UPD46128512F9-CR2 |
| 廠商： | NEC Corp. |
| 英文描述： | 128M-BIT CMOS MOBILE SPECIFIED RAM 8M-WORD BY 16-BIT EXTENDED TEMPERATURE OPERATION |
| 中文描述： | 128兆位CMOS移動(dòng)指明內(nèi)存800萬(wàn)字由16位溫度范圍 |
| 文件頁(yè)數(shù)： | 9/82頁(yè) |
| 文件大?。?/td> | 817K |
| 代理商： | UPD46128512F9-CR2 |
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Preliminary Data Sheet M17507EJ2V0DS
9
μ
PD46128512-X
1. Initialization
Initialize the
μ
PD46128512-X at power application using the following sequence to stabilize internal circuits.
There are 2 method of initialization.
Initialization Timing 1
(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 1
/CE1 (Input)
CE2 (Input)
t
MHCL
Intialization
t
CHMH
t
VHMH
Nomal Operation
V
CC
, V
CC
Q
V
CC
(MIN.), V
CC
Q (MIN.)
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
CC
(MIN.), V
CC
Q (MIN.)).
Initialization Timing 1
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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