Figure 5
Toggle Bit Algorithm
Figure 6
Data Polling Algorithm
Start
VA = Byte Address for Programming
= Any of the Sector Addresses
within the sector being erased
during sector erase operation
= XXXXH during Chip Erase
Start
VA = Byte Address for Programming
= Any of the Sector Addresses
within the sector being erased
during sector erase operation
= XXXXH during Chip Erase
Read Byte
D
0
-D
7
Address = VA
Read Byte
D
0
-D
7
Address = VA
D
6
= Toggle
?
Yes
No
No
D
7
= Data
?
No
No
Yes
D
5
= 1
?
Yes
Read Byte
D
0
-D
7
Address = VA
D
5
= 1
?
Yes
Read Byte
D
0
-D
7
Address = VA
D
6
=
Toggle?
(Note 1)
Yes
Fail
No
D
7
=
Toggle?
(Note 1)
Pass
Fail
No
Yes
Pass
Note 1. D
6
is rechecked even if D
5
= "1" because D
6
may stop toggling at
the same time as D
5
changes to "1".
Note 1. D
7
is rechecked even if D
5
= "1" because D
7
may change
simultaneously with D
5.
Aeroflex Circuit Technology
12
SCD1667 REV A 4/28/97 Plainview NY (516) 694-6700
AEROFLEX [ AEROFLEX CIRCUIT TECHNOLOGY ]
