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參數(shù)資料
| 型號： | UPD4218165L |
| 廠商： | NEC Corp. |
| 英文描述： | 3.3 V OPERATION 16 M-BIT DYNAMIC RAM 1 M-WORD BY 16-BIT, EDO, BYTE READ/WRITE MODE |
| 中文描述： | 3.3 V工作16 m位動態(tài)隨機(jī)存儲器1個(gè)M字由16位，江戶，字節(jié)讀/寫模式 |
| 文件頁數(shù)： | 38/48頁 |
| 文件大?。?/td> | 319K |
| 代理商： | UPD4218165L |
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μ
PD42S18165L, 4218165L
38
CAS Before RAS Self Refresh Cycle (Only for the
μ
PD42S18165L)
t
CSR
V
IH
–
V
IL
–
RAS
t
RASS
t
RPS
t
CRP
t
RPC
t
CHS
t
CPN
V
IH
–
V
IL
–
UCAS
LCAS
Remark
Address, WE, OE: Don’t care
L I/O, U I/O: Hi-Z
Cautions on Use of CAS Before RAS Self Refresh
CAS before RAS self refresh can be used independently when used in combination with distributed CAS
before RAS long refresh; However, when used in combination with burst CAS before RAS long refresh or with
long RAS only refresh (both distributed and burst), the following cautions must be observed.
(1) Normal Combined Use of CAS Before RAS Self Refresh and Burst CAS Before RAS Long Refresh
When CAS before RAS self refresh and burst CAS before RAS long refresh are used in combination, please
perform CAS before RAS refresh 1,024 times within a 16 ms interval just before and after setting CAS before
RAS self refresh.
(2) Normal Combined Use of CAS Before RAS Self Refresh and Long RAS Only Refresh
When CAS before RAS self refresh and RAS only refresh are used in combination, please perform RAS only
refresh 1,024 times within a 16 ms interval just before and after setting CAS before RAS self refresh.
(3)
If t
RASS (MIN.)
is not satisfied at the beginning of CAS before RAS self refresh cycles (t
RAS
< 100
μ
s), CAS before
RAS refresh cycles will be executed one time.
If 10
μ
s < t
RAS
< 100
μ
s, RAS precharge time for CAS before RAS self refresh (t
RPS
) is applied.
And refresh cycles (1,024/128 ms) should be met.
For details, please refer to
How to use DRAM
User’s Manual.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| UPD42S18165L | 3.3 V OPERATION 16 M-BIT DYNAMIC RAM 1 M-WORD BY 16-BIT, EDO, BYTE READ/WRITE MODE |
| UPD42270 | NTSC FIELD BUFFER |
| UPD42274 | DUAL - PORT GRAPHICS BUFFER |
| UPD43256A | 32,768 X 8-BIT STATIC CMOS RAM |
| UPD43256AC-10LL | 32,768 X 8-BIT STATIC CMOS RAM |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UPD4218165LE-50 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:x16 EDO Page Mode DRAM |
| UPD4218165LE-60 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:x16 EDO Page Mode DRAM |
| UPD4218165LE-70 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:x16 EDO Page Mode DRAM |
| UPD4218165LG5-A50-7JF | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:x16 EDO Page Mode DRAM |
| UPD4218165LG5-A60 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:x16 EDO Page Mode DRAM |
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