X28C010KM-25 Datasheet, PDF (5/20 Pages) Intersil Corporation – Protects data against system level inadvertent writes

Write Data
Writes
No
Complete?
Yes
Save Last Data
and Address
X28C010, X28HT010
DATA Polling can effectively halve the time for writing to the
X28C010/X28HT010. The timing diagram in Figure 2
illustrates the sequence of events on the bus. The software
flow diagram in Figure 3 illustrates one method of
implementing the routine.
Read Last
Address
IO₇
No
Compare?
Yes
X28C010
Ready
FIGURE 3. DATA POLLING SOFTWARE FLOW
The Toggle Bit I/O₆
Last
WE ^Write
CE
OE
I/O₆
V_OH
*
V_OL
HIGH Z
*
* Beginning and ending state of I/O₆ will vary
FIGURE 4. TOGGLE BIT BUS SEQUENCE
X28C010
Ready
5
FN8105.1
February 12, 2007