Filter
Top Products
Programming (or Clear) Algorithm
PRELIMINARY
3-4
PRELIMINARY
3.2 Programming (or Clear) Algorithm
The programming algorithm sequentially writes any number of addresses with
a specified bit pattern.This algorithm is used to program application code or
data into the flash array. With a slight modification, the same algorithm per-
forms the clear portion of the initialization flow (i.e., programs all bits to zero).
In this role, the algorithm is called the clear algorithm. For the clear algorithm,
the values programmed are always 0000h, while the values for application
code can be any combination of 1s and 0s. Figure 3–2 highlights the program-
ming and clear algorithms’ place in the overall flow.
Figure 3–2. The Programming Algorithm in the Overall Flow
Flash-write
algorithm
Erase
algorithm
Clear
algorithm
X = X+1
flash-write
Recover using
Fail
Yes
No
X < 10 ?
array
Erase the
Clear the
array
No
Yes
Reprogram?
Bits in
depletion?
X = 1
Start
Program
the array
Initialization flow
Programming
algorithm
No
Yes
Done/Stop