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參數(shù)資料
| 型號(hào)： | X20C16DMB-45 |
| 英文描述： | High Speed AUTOSTORE⑩ NOVRAM |
| 中文描述： | 高速自動(dòng)存儲(chǔ)⑩NOVRAM |
| 文件頁數(shù)： | 12/21頁 |
| 文件大?。?/td> | 94K |
| 代理商： | X20C16DMB-45 |
X20C16
12
AUTOSTORE Feature
The AUTOSTORE feature automatically saves the con-
tents of the X20C16’s static RAM to the on-board bit-for-
bit shadow E
2
PROM at power-down. This circuitry in-
sures that no data is lost during accidental power-downs
or general system crashes, and is ideal for microproces-
sor caching systems, embedded software systems, and
general system back-up memory.
The AUTOSTORE instruction (EAS) to the SDP register
sets the AUTOSTORE enable latch, allowing the X20C16
to automatically perform a store operation whenever
V
CC
falls below the AUTOSTORE threshold (V
ASTH
).
V
CC
must remain above the AUTOSTORE Cycle End
Voltage (V
ASEND
) for the duration of the store cycle
(t
ASTO
). The detailed timing for this feature is illustrated
in the AUTOSTORE timing diagram, below. Once the
AUTOSTORE cycle is initiated, all other device func-
tions are inhibited.
AUTOSTORE CYCLE Timing Diagrams
3826 FHD F14
AUTOSTORE CYCLE LIMITS
X20C16
Symbol
Parameter
Min.
Max.
Units
t
ASTO
V
ASTH
V
ASEND
AUTOSTORE Cycle Time
AUTOSTORE Threshold Voltage
AUTOSTORE Cycle End Voltage
2.5
4.3
ms
V
V
3826 PGM T15
4.0
3.5
AS
tPUR
tASTO
tPUR
0V
VASTH
VCC
1
2
3
4
5
VCC
V
TIME (ms)
VASTH
VASEND
AUTOSTORE CYCLE IN PROGRESS
tASTO
STORE TIME
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| X20C16DMB-55 | High Speed AUTOSTORE⑩ NOVRAM |
| X20C16DM-35 | High Speed AUTOSTORE⑩ NOVRAM |
| X20C16DM-45 | High Speed AUTOSTORE⑩ NOVRAM |
| X20C16DM-55 | High Speed AUTOSTORE⑩ NOVRAM |
| X20C16EI-35 | High Speed AUTOSTORE⑩ NOVRAM |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| X20C16DMB-55 | 制造商:XICOR 制造商全稱:Xicor Inc. 功能描述:High Speed AUTOSTORE⑩ NOVRAM |
| X20C16E-35 | 制造商:XICOR 制造商全稱:Xicor Inc. 功能描述:High Speed AUTOSTORE⑩ NOVRAM |
| X20C16E-45 | 制造商:XICOR 制造商全稱:Xicor Inc. 功能描述:High Speed AUTOSTORE⑩ NOVRAM |
| X20C16E-55 | 制造商:XICOR 制造商全稱:Xicor Inc. 功能描述:High Speed AUTOSTORE⑩ NOVRAM |
| X20C16EI-35 | 制造商:XICOR 制造商全稱:Xicor Inc. 功能描述:High Speed AUTOSTORE⑩ NOVRAM |
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