A d v a n c e I n f o r m a t i o n
START
Write Program
Command Sequence
Data Poll
from System
Embedded
Program
algorithm
in progress
Verify Data?
Yes
No
No
Increment Address
Last Address?
Yes
Programming
Completed
Note: See Table 30 on page 54 and Table 31 on page 55 for program command sequence
.
Figure 4. 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 writ-
ten during a programming process, the device halts the program operation
within 15 µs maximum (5µs typical) and updates the status bits. Addresses are
not required when writing the Program Suspend command.
After the programming operation is 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
Program area), then user must use the proper command sequences to enter and
exit this region. Note that the Secured Silicon Sector, autoselect, and CFI func-
tions are unavailable when a 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 Au-
toselect Command Sequence on page 44 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 22, 2005 S29GL-A_00_A3
S29GL-A MirrorBit™ Flash Family
49
SPANSION [ SPANSION ]
