S29GL01GP datasheet(34/81 Pages) SPANSION

34 / 81 page

S29GL-P MirrorBit® Flash Family

S29GL-P_00_A14 October 22, 2012

Da ta

Sh e e t

7.7.6

Program Suspend/Program Resume Commands

The Program Suspend command allows the system to interrupt an embedded programming operation or a

“Write to Buffer” programming operation so that data can read from any non-suspended sector. When the

Program Suspend command is written during a programming process, the device halts the programming

operation within 15 µs maximum (5 µs typical) and updates the status bits. Addresses are “don't-cares” 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 within a sector in Erase

Suspend or Program Suspend. If a read is needed from the Secured Silicon Sector area, then user must use

the proper command sequences to enter and exit this region.

The system may also write the Autoselect Command Sequence when the device is in Program Suspend

mode. The device allows reading Autoselect codes in the suspended sectors, since the codes are not stored

in the memory array. When the device exits the Autoselect mode, the device reverts to Program Suspend

mode, and is ready for another valid operation. See Autoselect on page 21 for more information.

After the Program Resume command is written, the device reverts to programming. The system can

determine the status of the program operation using the write operation status bits, just as in the standard

program operation. See Write Operation Status on page 36 for more information.

The system must write the Program Resume command (address bits are “don't care”) to exit the Program

Suspend mode and continue the programming operation. Further writes of the Program Resume command

are ignored. Another Program Suspend command can be written after the device has resumed programming.

Software Functions and Sample Code

The following is a C source code example of using the program suspend function. Refer to the Spansion Low

Level Driver User’s Guide (available on www.spansion.com) for general information on Spansion Flash

memory software development guidelines.

/* Example: Program suspend command */

*( (UINT16 *)base_addr ) = 0x00B0;

/* write suspend command

The following is a C source code example of using the program resume function. Refer to the Spansion Low

Level Driver User’s Guide (available on www.spansion.com) for general information on Spansion Flash

memory software development guidelines.

/* Example: Program resume command */

*( (UINT16 *)base_addr ) = 0x0030;

/* write resume command

Table 7.12 Program Suspend

(LLD Function = lld_ProgramSuspendCmd)

Cycle

Operation

Byte Address

Word Address

Data

Write

Base + XXXh

00B0h

Table 7.13 Program Resume

(LLD Function = lld_ProgramResumeCmd)

Cycle

Operation

Byte Address

Word Address

Data

Write

Base + XXXh

0030h

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