AM29LV640MT110REF datasheet(34/66 Pages) AMD

34 / 66 page

Am29LV640MT/B

26190C8 February 1, 2007

D A TA

SH EE T

Figure 5.

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 Sus-

pend command is written during a programming pro-

cess, the device 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 sus-

pended, the system can read array data from any

non-suspended sector. The Program Suspend com-

mand can also be issued during a programming oper-

ation while an erase is suspended. In this case, data

can be read from any addresses not in Erase Suspend

or Program Suspend. If a read is needed from the Se-

cured Silicon Sector area (One-time Program area),

then user must use the proper command sequences

to enter and exit this region.

The system can 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 on page 28 for more

information.

After the Program Resume command is written, the

device reverts to programming. The system can deter-

mine the status of the program operation using the

DQ7 or DQ6 status bits, just as in the standard pro-

gram operation. See Write Operation Status on

page 38 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 13 for program command sequence.

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