AM29LV065MU112REF datasheet(30/62 Pages) AMD

30 / 62 page

Am29LV065MU

September 12, 2006

DA TA

SH EET

The Write Buffer Programming Sequence can be

aborted in the following ways:

■ Load a value that is greater than the page buffer

size during the Number of Locations to Program

step.

■ Write to an address in a sector different than the

one specified during the Write-Buffer-Load com-

mand.

■ Write an Address/Data pair to a different

write-buffer-page than the one selected by the

Starting Address during the write buffer data load-

ing stage of the operation.

■ Write data other than the Confirm Command after

the specified number of data load cycles.

The abort condition is indicated by DQ1 = 1, DQ7 =

DATA# (for the last address location loaded), DQ6 =

toggle, and DQ5=0. A Write-to-Buffer-Abort Reset

command sequence must be written to reset the de-

vice for the next operation. Note that the full 3-cycle

Write-to-Buffer-Abort Reset command sequence is re-

quired when using Write-Buffer-Programming features

in Unlock Bypass mode.

Accelerated Program

The device offers accelerated program operations

through the ACC pin. When the system asserts VHH on

the ACC pin, the device automatically enters the Un-

lock Bypass mode. The system may then write the

two-cycle Unlock Bypass program command se-

quence. The device uses the higher voltage on the

ACC pin to accelerate the operation. Note that the

ACC pin must not be at VHH for operations other than

accelerated programming, or device damage may re-

sult. In addition, the ACC pin must not be left floating

or unconnected; inconsistent behavior of the device

may result.

Figure 4 illustrates the algorithm for the program oper-

ation. See the table, “Erase and Program Operations”

on page 45 for parameters, and Figure 16 for timing di-

agrams.

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