X20C17
Recall operations are performed automatically upon
power-up.
WAVEFORM
INPUTS
OUTPUTS
Store operations are performed automatically upon
power-down. The store operation take a maximum of
2.5ms.
Must be
steady
Will be
steady
May change
from Low to
High
Will change
from Low to
High
Write Protection
The X20C17 supports two methods of protecting the
nonvolatile data.
May change
from High to
Low
Will change
from High to
Low
– If after power-up no RAM write operations have
occured, no AUTOSTORE operation can be initiated.
Don’t Care:
Changes
Allowed
Changing:
State Not
Known
– V
≤ 3V typical.
Sense—All functions are inhibited when V
is
N/A
Center Line
is High
Impedance
CC
CC
SYMBOL TABLE
The following symbol table provides a key to under-
standing the conventions used in the device timing dia-
grams. The diagrams should be used in conjunction
with the device timing specifications to determine
actual device operation and performance, as well as
device suitability for user’s application.
Characteristics subject to change without notice. 3 of 12
XICOR [ XICOR INC. ]
