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CAT28C010TI-15T датащи(PDF) 9 Page - Catalyst Semiconductor

номер детали CAT28C010TI-15T
подробное описание детали  1024K-Bit CMOS PARALLEL E2PROM
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производитель  CATALYST [Catalyst Semiconductor]
домашняя страница  http://www.catalyst-semiconductor.com
Logo CATALYST - Catalyst Semiconductor

CAT28C010TI-15T датащи(HTML) 9 Page - Catalyst Semiconductor

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Advanced Information
CAT28C010
9
Doc. No. 25093-00 7/99 P-1
Note:
(1)
Write protection is activated at this point whether or not any more writes are completed. Writing to addresses must occur within tBLC
Max., after SDP activation.
HARDWARE DATA PROTECTION
The following is a list of hardware data protection fea-
tures that are incorporated into the CAT28C010.
(1) VCC sense provides for write protection when VCC
falls below 3.5V min.
(2) A power on delay mechanism, tINIT (see AC charac-
teristics), provides a 5 to 10 ms delay before a write
sequence, after VCC has reached 3.5V min.
(3) Write inhibit is activated by holding any one of
OE
low,
CE high or WE high.
(4) Noise pulses of less than 20 ns on the
WE or CE
inputs will not result in a write cycle.
SOFTWARE DATA PROTECTION
The CAT28C010 features a software controlled data
protection scheme which, once enabled, requires a data
algorithm to be issued to the device before a write can be
performed. The device is shipped from Catalyst with the
software protection NOT ENABLED (the CAT28C010 is
in the standard operating mode).
Figure 9. Write Sequence for Activating Software
Data Protection
Figure 10. Write Sequence for Deactivating
Software Data Protection
5096 FHD F08
5096 FHD F09
SOFTWARE DATA
PROTECTION ACTIVATED
(12)
WRITE DATA:
XX
WRITE LAST BYTE
TO
LAST ADDRESS
TO ANY ADDRESS
WRITE DATA:
AA
ADDRESS:
5555
WRITE DATA:
55
ADDRESS:
2AAA
WRITE DATA:
A0
ADDRESS:
5555
(1)
WRITE DATA:
AA
ADDRESS:
5555
WRITE DATA:
55
ADDRESS:
2AAA
WRITE DATA:
80
ADDRESS:
5555
WRITE DATA:
AA
ADDRESS:
5555
WRITE DATA:
55
ADDRESS:
2AAA
WRITE DATA :
20
ADDRESS:
5555


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