S29PL-N SPANSION [SPANSION], S29PL-N Datasheet - Page 28
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S29PL-N
Manufacturer Part Number
S29PL-N
Description
256/128/128 Mb (16/8/8 M x 16-Bit) CMOS, 3.0 Volt-only Simultaneous Read/Write, Page-Mode Flash Memory
Manufacturer
SPANSION [SPANSION]
Datasheet
1.S29PL-N.pdf
(85 pages)
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7.4
26
Program/Erase Operations
7.4.1 Single Word Programming
These devices are capable of single word or write buffer programming operations which are de-
scribed in the following sections. The write buffer programming is recommended over single word
programming as it has clear benefits from greater programming efficiency. See
page 21
Note the following details regarding the program/erase operations:
In single word programming mode, four Flash command write cycles are used to program an in-
dividual Flash address. While this method is supported by all Spansion devices, in general it is not
recommended for devices that support Write Buffer Programming. See
quired bus cycles and
When the Embedded Program algorithm is complete, the device then returns to the read mode
and addresses are no longer latched. The system can determine the status of the program oper-
ation by using DQ7 or DQ6. See
Single word programming is supported for backward compatibility with existing Flash driver soft-
ware and use of write buffer programming is strongly recommended for general programming.
The effective word programming time using write buffer programming is approximately four times
faster than the single word programming time.
When the Embedded Program algorithm is complete, the device then returns to the read
mode.
The system can determine the status of the program operation by using DQ7 or DQ6. See
Write Operation Status
A 0 cannot be programmed back to a 1. Attempting to do so causes the device to set DQ5 =
1 (halting any further operation and requiring a reset command). A succeeding read shows
that the data is still 0.
Only erase operations can convert a 0 to a 1.
A hardware reset immediately terminates the program operation and the program command
sequence should be reinitiated once the device has returned to the read mode, to ensure data
integrity.
Any commands written to the device during the Embedded Program Algorithm are ignored
except the Program Suspend command.
Secured Silicon Sector, Autoselect, and CFI functions are unavailable when a program oper-
ation is in progress.
Programming is allowed in any sequence and across sector boundaries for single word pro-
gramming operation.
for the correct device settings required before initiation of a write command sequence.
Figure 7.1
S29PL-N MirrorBit™ Flash Family
for information on these status bits.
Write Operation Status
for the flowchart.
P r e l i m i n a r y
for information on these status bits.
S29PL-N_00_A4 November 23, 2005
Table 12.1
Table 7.1 on
for the re-
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