A d v a n c e I n f o r m a t i o n
address range without intervening erases. For applications requiring incremental
bit programming, a modified programming method is required; please contact
your local Spansion representative. Any bit in a write buffer address range
cannot be programmed from 0 back to a 1. Attempting to do so may cause
the device to set DQ5=1, of cause the DQ7 and DQ6 status bits to indicate the
operation was successful. However, a succeeding read shows that the data is still
0. Only erase operations can convert a 0 to a 1.
Accelerated Program
The device offers accelerated program operations through the WP#/ACC or ACC
pin depending on the particular product. When the system asserts V
on the
HH
WP#/ACC or ACC pin. The device uses the higher voltage on the WP#/ACC or
ACC pin to accelerate the operation. Note that the WP#/ACC pin must not be at
V
for operations other than accelerated programming, or device damage may
HH
result. WP# contains an internal pullup; when unconnected, WP# is at V
.
IH
Figure 3, on page 48 illustrates the algorithm for the program operation. Refer
to the Erase and Program Operations–AC Characteristics on page 66 for param-
eters, and Figure 14, on page 68 for timing diagrams.
April 22, 2005 S29GL-A_00_A3
S29GL-A MirrorBit™ Flash Family
47
SPANSION [ SPANSION ]
