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PDF AS58C1001 Data sheet ( Hoja de datos )
| Número de pieza | AS58C1001 | |
| Descripción | 128K x 8 EEPROM EEPROM Memory | |
| Fabricantes | Austin Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AS58C1001 (archivo pdf) en la parte inferior de esta página. Total 22 Páginas | ||
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Austin Semiconductor, Inc.
EEPROM
AS58C1001
PLEASE NOTE:
E An EOL notice was
ndissued on this product in
O2001. However, ASI has a
f Lwww.DataSheet4U.com
large amount of die inventory
ifeavailable. For assistance,
please contact your local
sales representative.
AS58C1001
Rev. 5.0 7/02
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
1
1 page  
Austin Semiconductor, Inc.
(EXAMPLE)
EEPROM
AS58C1001
Vcc
RES\
E *unprogrammable
ndFUNCTIONAL DESCRIPTION (continued)
ODATA PROTECTION (continued)
2. Data protection at Vcc on/off.
fWhen RES\ is low, the EEPROM cannot be erased and
programmed. Therefore, data can be protected by keeping
LRES\ low when Vcc is switched. RES\ should be high during
programming because it does not provide a latch function.
iWhen Vcc is turned on or off, noise on the control pins
fegenerated by external circuits (CPU, etc.) may turn the
*unprogrammable
Write Data
Write Address (Normal Data Input)
5555
AA
2AAA
55
5555
A0
EEPROM to programming mode by mistake. To prevent
this unintentional programming, the EEPROM must be kept
in an unprogrammable, standby or readout state by using a
CPU reset signal to RES\ pin.
In addition, when RES\ is kept high at Vcc on/off timing,
the input level of control pins (CE\, OE\, WE\) must be held
The Software data protection mode can be cancelled by
inputting the following 6 Bytes. This changes the AS58C1001
to the Non-Protection mode, for normal operation.
as CE\=Vcc or OE\=LOW or WE\=Vcc level.
Address
Data
3. Software Data Protection
To protect against unintentional programming caused by
5555
AA
noise generated by external circuits, AS58C1001 has a
Software data protection function. To initate Software data
2AAA
55
protection mode, 3 bytes of data must be input, followed by
a dummy write cycle of any address and any data byte. This
5555
80
exact sequence switches the device into protection mode.
5555
AA
2AAA
55
5555
20
AS58C1001
Rev. 5.0 7/02
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
5
5 Page 
Austin Semiconductor, Inc.
EEPROM
AS58C1001
Address
DATA\ POLLING TIMING WAVEFORM
An An
111222333444
CE\
WE\
OE\
EndI/O7
tCE
tOEH
DIN X
tOE
DOUT X\
tWC
tOES
tDW
DOUT X
Of LifeTOGGLEBITWAVEFORM
Next Mode
Address
CE\ tCE
WE\
OE\
tOEH
tOE
I/O7 DIN
DOUT
DOUT
tWC DOUT
tOES
DOUT tDW
In transition from HI to LOW or LOW to HI.
AS58C1001
Rev. 5.0 7/02
11
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
11 Page | ||
| Páginas | Total 22 Páginas | |
| PDF Descargar | [ Datasheet AS58C1001.PDF ] | |
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