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X28HC64J-90 Datasheet(PDF) 6 Page - Intersil Corporation

Part # X28HC64J-90
Description  5 Volt, Byte Alterable EEPR
Download  18 Pages
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Manufacturer  INTERSIL [Intersil Corporation]
Direct Link  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

X28HC64J-90 Datasheet(HTML) 6 Page - Intersil Corporation

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6
FN8109.3
August 18, 2015
Software Data Protection
Regardless of whether the device has previously been
protected or not, once the software data protection algorithm
is used, the X28HC64 will automatically disable further
writes unless another command is issued to deactivate it. If
no further commands are issued the X28HC64 will be write
protected during power-down and after any subsequent
power-up.
Note: Once initiated, the sequence of write operations
should not be interrupted.
CE
WE
(VCC)
WRITE
PROTECTED
VCC
0V
DATA
ADDR
AAA
1555
55
0AAA
A0
1555
tBLC MAX
WRITES
OK
BYTE
OR
PAGE
tWC
FIGURE 6. TIMING SEQUENCE—BYTE OR PAGE WRITE
WRITE LAST
WRITE DATA XX
TO ANY
WRITE DATA A0
TO ADDRESS
1555
WRITE DATA 55
TO ADDRESS
0AAA
WRITE DATA AA
TO ADDRESS
1555
AFTER TWC
RE-ENTERS DATA
PROTECTED STATE
BYTE TO
LAST ADDRESS
ADDRESS
OPTIONAL
BYTE/PAGE
LOAD OPERATION
BYTE/PAGE
LOAD ENABLED
FIGURE 7. WRITE SEQUENCE FOR SOFTWARE DATA
PROTECTION
X28HC64


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