S29GL128S SPANSION [SPANSION], S29GL128S Datasheet - Page 27

• Manufacturer Part Number: S29GL128S
• Manufacturer: SPANSION [SPANSION]

5.3
March 16, 2012 S29GL_128S_01GS_00_06
5.2.2
5.3.1
5.3.1.1
Command Set
Incremental Programming
Program Methods
operations to make Write Buffer Programming more efficient and thus faster than programming individual
words with the Word Programming command.
The same word location may be programmed more than once, by either the Word or Write Buffer
Programming methods, to incrementally change 1’s to 0’s.
Word Programming
Word programming is used to program a single word anywhere in the main Flash Memory Array.
The Word Programming command is a four-write-cycle sequence. The program command sequence is
initiated by writing two unlock write cycles, followed by the program set up command. The program address
and data are written next, which in turn initiate the Embedded Word Program algorithm. The system is not
required to provide further controls or timing. The device automatically generates the program pulses and
verifies the programmed cell margin internally. When the Embedded Word Program algorithm is complete,
the EAC then returns to its standby mode.
The system can determine the status of the program operation by using Data Polling Status, reading the
Status Register, or monitoring the RY/BY# output. See
status bits. See
on page 27
Any commands other than Program Suspend written to the device during the Embedded Program algorithm
are ignored. Note that a hardware reset (RESET# = V
and returns the device to read mode after t
sequence should be reinitiated once the device has completed the hardware reset operation.
The Word Programming command may also be used when the SSR ASO is entered.
A modified version of the Word Programming command, without unlock write cycles, is used for programming
when entered into the Lock Register, Password, and PPB ASOs. The same command is used to change
volatile bits when entered in to the PPB Lock, and DYB ASOs. See
command sequences.
for a diagram of the programming operation.
Data Polling Status on page 38
Embedded
in progress
algorithm
Program
D a t a
GL-S MirrorBit
S h e e t
Figure 5.1 Word Program Operation
Write Program Command
Programming Completed
Data Poll from System
Last Addresss?
Verify Word?
Sequence
RPH
START
time. To ensure data integrity, the Program command
for information on these status bits. See
®
Yes
Family
Yes
IL
Status Register on page 37
) immediately terminates the programming operation
No
No
Table 6.1 on page 57
Increment Address
for information on these
Figure 5.1
for program
27