X28C512 Xicor, X28C512 Datasheet - Page 8

• Manufacturer Part Number: X28C512
• Description: 5 Volt/ Byte Alterable E2PROM
• Manufacturer: Xicor

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