X28C512_06 Datasheet, PDF (6/21 Pages) Intersil Corporation – 5V, Byte Alterable EEPROM

DATA Polling I/O₇
Last
WE ^Write
X28C512, X28C513
CE
OE
V_IH
I/O₇
HIGH Z
V_OL
A₀-A₁₅
A_n
A_n
A_n
A_n
A_n
V_OH
X28C512, X28C513
Ready
A_n
A_n
Write Data
FIGURE 2A. DATA POLLING BUS SEQUENCE
DATA Polling can effectively halve the time for writing to the
X28C512, X28C513. The timing diagram in Figure 2A
illustrates the sequence of events on the bus. The software
flow diagram in Figure 2B illustrates one method of
implementing the routine.
Writes
No
Complete?
Yes
Save Last Data
and Address
Read Last
Address
IO₇
No
Compare?
Yes
Ready
FIGURE 2B. DATA POLLING SOFTWARE FLOW
6
FN8106.2
June 7, 2006