S71GS256 datasheet(71/195 Pages) SPANSION

71 / 195 page

December 15, 2004 S29GLxxxN_MCP_A1

S29GLxxxN MirrorBitTM Flash Family

Ad vance

Info rmat i o n

Figure 2. Program Operation

Program Suspend/Program Resume Command Sequence

The Program Suspend command allows the system to interrupt a programming

operation or a Write to Buffer programming operation so that data can be read

from any non-suspended sector. When the Program Suspend command is written

during a programming process, the device halts the program operation within 15

µs maximum (5µs typical) and updates the status bits. Addresses are not re-

quired when writing the Program Suspend command.

After the programming operation has been suspended, the system can read array

data from any non-suspended sector. The Program Suspend command may also

be issued during a programming operation while an erase is suspended. In this

case, data may be read from any addresses not in Erase Suspend or Program

Suspend. If a read is needed from the Secured Silicon Sector area (One-time Pro-

gram area), then user must use the proper command sequences to enter and exit

this region. Note that the Secured Silicon Sector autoselect, and CFI functions are

unavailable when program operation is in progress.

The system may also write the autoselect command sequence when the device

is in the Program Suspend mode. The system can read as many autoselect codes

as required. When the device exits the autoselect mode, the device reverts to the

Program Suspend mode, and is ready for another valid operation. See Autoselect

Command Sequence for more information.

START

Write Program

Command Sequence

Data Poll

from System

Verify Data?

Yes

Last Address?

Yes

Programming

Completed

Increment Address

Embedded

Program

algorithm

in progress

Note: See Table 12 for program command sequence.

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