X25043 Datasheet, PDF (6/15 Pages) Xicor Inc. – Programmable Watchdog Supervisory E2PROM

X25043/45
Figure 3. Write Enable Latch Sequence
CS
SCK
01234567
SI
HIGH IMPEDANCE
SO
Figure 4. Byte Write Operation Sequence
3844 FHD F05
CS
SCK
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
INSTRUCTION
BYTE ADDRESS
DATA BYTE
SI
8
7654321076543210
9TH BIT OF ADDRESS
HIGH IMPEDANCE
SO
3844 FHD F06
SYMBOL TABLE
WAVEFORM INPUTS
OUTPUTS
Must be
steady
May change
from LOW
to HIGH
May change
from HIGH
to LOW
Don’t Care:
Changes
Allowed
N/A
Will be
steady
Will change
from LOW
to HIGH
Will change
from HIGH
to LOW
Changing:
State Not
Known
Center Line
is High
Impedance
6