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S29AL016M90BAIR23

16 Megabit (2 M x 8-Bit/1 M x 16-Bit) 3.0 Volt-only Boot Sector Flash Memory featuring MirrorBit™ technology

Spansion Inc. 

START

Write Erase

Command Sequence

Data Poll

from System

No

Data = FFh?

Embedded

Erase

algorithm

in progress

Yes

Erasure Completed

Notes:

1. See Tables 10–11 for erase command sequence.

2. See “DQ3: Sector Erase Timer” for more information.

Figure 5. Erase Operation

Program Suspend/Program Resume Command Sequence

The Program Suspend command allows the system to interrupt a 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 de-

vice halts the program operation within 15 µs maximum (5 µs typical) and

updates the status bits. Addresses are not required 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 sus-

pended. In this case, data may be read from any addresses not in Erase

Suspend or Program Suspend. If a read is needed from the SecSi Sector area

(One-time Program 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 the Program Suspend mode. The system can read as many autoselect

codes as required. When the device exits the autoselect mode, the device re-

verts to the Program Suspend mode, and is ready for another valid operation.

See Autoselect Command Sequence for more information.

After the Program Resume command is written, the device reverts to program-

ming. The system can determine the status of the program operation using the

April 21, 2004 S29AL016M_00A4

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