L640DU21NF datasheet(29/57 Pages) AMD

Part #	L640DU21NF

Description	64 Megabit (4 M x 16-Bit) CMOS 3.0 Volt-only Uniform Sector Flash Memory with VersatileIO??Control

PDF	57 Pages

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Manufacturer	AMD [Advanced Micro Devices]

Direct Link	http://www.amd.com

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29 / 57 page

January 22, 2007 22366C6

Am29LV640D/Am29LV641D

D A TA

SH EE T

as in the standard word program operation. Refer to

“Write Operation Status” on page 29 for more informa-

tion.

In the erase-suspend-read mode, the system can also

issue the autoselect command sequence. Refer to

“Autoselect Mode” on page 16 and “Autoselect Com-

mand Sequence” on page 24 for details.

To resume the sector erase operation, the system

must write the Erase Resume command. Fur ther

writes of the Resume command are ignored. Another

Erase Suspend command can be written after the chip

resumes erasing.

Figure 4.

Erase Operation

START

Write Erase

Command Sequence

(Notes 1, 2)

Data Poll to Erasing

Bank from System

Data = FFh?

Yes

Erasure Completed

Embedded

Erase

algorithm

in progress

Notes:

1. See Table 10 for erase command sequence.

2. See the section on DQ3 for information on the sector

erase timer.

L640DU21NF Datasheet(PDF) 29 Page - Advanced Micro Devices