S29GL01GS10DFIV010 datasheet(27/106 Pages) SPANSION

27 / 106 page

October 9, 2013 S29GL_128S_01GS_00_08

GL-S MirrorBit® Family

Data

She e t

overhead in writing program commands and reduces memory device internal overhead in programming

operations to make Write Buffer Programming more efficient and thus faster than programming individual

words with the Word Programming command.

5.2.2

Incremental Programming

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.

5.3

Command Set

5.3.1

Program Methods

5.3.1.1

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 Register on page 37 for information on these

status bits. See Data Polling Status on page 38 for information on these status bits. See Figure 5.1

on page 27 for a diagram of the programming operation.

Any commands other than Program Suspend written to the device during the Embedded Program algorithm

are ignored. Note that a hardware reset (RESET# = VIL) immediately terminates the programming operation

and returns the device to read mode after tRPH time. To ensure data integrity, the Program command

sequence should be reinitiated once the device has completed the hardware reset operation.

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 Table 6.1 on page 57 for program

command sequences.

Figure 5.1 Word Program Operation

START

Write Program Command

Sequence

Data Poll from System

Verify Word?

Last Addresss?

Increment Address

Embedded

Program

algorithm

in progress

Programming Completed

Yes

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