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參數資料
| 型號： | X20C05EM-45 |
| 英文描述： | High Speed AUTOSTORE⑩ NOVRAM |
| 中文描述： | 高速自動存儲⑩NOVRAM |
| 文件頁數： | 12/19頁 |
| 文件大?。?/td> | 82K |
| 代理商： | X20C05EM-45 |
X20C05
12
AUTOSTORE Feature
The AUTOSTORE feature automatically saves the con-
tents of the X20C05’s RAM to the on-board bit-for-bit
shadow E
2
PROM at power-down. This circuitry insures
that no data is lost during accidental power-downs or
general system crashes, and is ideal for microprocessor
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 X20C05
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 Volt-
age (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 functions
are inhibited.
AUTOSTORE CYCLE Timing Diagrams
3827 FHD F14
AUTOSTORE CYCLE LIMITS
X20C05
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
3827 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PDF資料 |
PDF描述 |
|---|---|
| X20C05EM-55 | High Speed AUTOSTORE⑩ NOVRAM |
| X20C05JM-35 | High Speed AUTOSTORE⑩ NOVRAM |
| X20C05JM-45 | High Speed AUTOSTORE⑩ NOVRAM |
| X20C05JM-55 | High Speed AUTOSTORE⑩ NOVRAM |
| X20C05PI-35 | High Speed AUTOSTORE⑩ NOVRAM |
相關代理商/技術參數 |
參數描述 |
|---|---|
| X20C05EM-55 | 制造商:XICOR 制造商全稱:Xicor Inc. 功能描述:High Speed AUTOSTORE⑩ NOVRAM |
| X20C05J-35 | 制造商:XICOR 制造商全稱:Xicor Inc. 功能描述:High Speed AUTOSTORE⑩ NOVRAM |
| X20C05J-45 | 制造商:XICOR 制造商全稱:Xicor Inc. 功能描述:High Speed AUTOSTORE⑩ NOVRAM |
| X20C05J-55 | 制造商:XICOR 制造商全稱:Xicor Inc. 功能描述:High Speed AUTOSTORE⑩ NOVRAM |
| X20C05JI-35 | 制造商:XICOR 制造商全稱:Xicor Inc. 功能描述:High Speed AUTOSTORE⑩ NOVRAM |
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