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X28C512RM-20 Datasheet(PDF) 8 Page - Xicor Inc.

Part # X28C512RM-20
Description  5 Volt, Byte Alterable E2PROM
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Manufacturer  XICOR [Xicor Inc.]
Direct Link  http://www.xicor.com
Logo XICOR - Xicor Inc.

X28C512RM-20 Datasheet(HTML) 8 Page - Xicor Inc.

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8
X28C512/X28C513
Resetting Software Data Protection
Figure 5a. Reset Software Data Protection Timing Sequence
Figure 5b. Software Sequence to Deactivate
Software Data Protection
In the event the user wants to deactivate the software
data protection feature for testing or reprogramming in
an E2PROM programmer, the following six step algo-
rithm will reset the internal protection circuit. After tWC,
the X28C512/513 will be in standard operating mode.
Note: Once initiated, the sequence of write operations
should not be interrupted.
3856 FHD F13
CE
WE
STANDARD
OPERATING
MODE
VCC
DATA
ADDR
AA
5555
55
2AAA
80
5555
NOTE: All other timings and control pins are per page write timing requirements.
≥t
WC
AA
5555
55
2AAA
20
5555
WRITE DATA 55
TO ADDRESS
2AAA
3856 FHD F14
WRITE DATA 55
TO ADDRESS
2AAA
WRITE DATA 80
TO ADDRESS
5555
WRITE DATA AA
TO ADDRESS
5555
WRITE DATA 20
TO ADDRESS
5555
WRITE DATA AA
TO ADDRESS
5555


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