L640DU21NF datasheet(25/57 Pages) AMD

25 / 57 page

January 22, 2007 22366C6

Am29LV640D/Am29LV641D

D A TA

SH EE T

Table 9.

Primary Vendor-Specific Extended Query

COMMAND DEFINITIONS

Writing specific address and data commands or se-

quences into the command register initiates device op-

erations. Table 10 on page 28 defines the valid

dress and data values or writing them in the im-

proper sequence, resets the device to reading array

data.

All addresses are latched on the falling edge of WE#

or CE#, whichever happens later. All data is latched on

the rising edge of WE# or CE#, whichever happens

first. Refer to “AC Characteristics” on page 37 for tim-

ing diagrams.

Reading Array Data

The device is automatically set to reading array data

after device power-up. No commands are required to

retrieve data. The device is ready to read array data

after completing an Embedded Program or Embedded

Erase algorithm.

After the device accepts an Erase Suspend command,

the device enters the erase-suspend-read mode, after

whi c h t he system can read dat a f r om an y

non-erase-suspended sector. After completing a pro-

gramming operation in the Erase Suspend mode, the

system may once again read array data with the same

exception. See “Erase Suspend/Erase Resume Com-

mands” on page 26, for more information.

Addresses (x16)

Data

Description

40h

41h

42h

0050h

0052h

0049h

Query-unique ASCII string “PRI”

43h

0031h

Major version number, ASCII

44h

0033h

Minor version number, ASCII

45h

0000h

Address Sensitive Unlock (Bits 1-0)

00b = Required, 01b = Not Required

Silicon Revision Number (Bits 7-2) 000000b = 0.23 µm Process Technology

46h

0002h

Erase Suspend

00 = Not Supported, 01 = To Read Only, 02 = To Read & Write

47h

0004h

Sector Protect

00 = Not Supported, X = Number of sectors per group

48h

0001h

Sector Temporary Unprotect

00 = Not Supported, 01 = Supported

49h

0004h

Sector Protect/Unprotect scheme

04 = 29LV800A mode

4Ah

0000h

Simultaneous Operation

00 = Not Supported, XX = Number of Sectors in Bank

4Bh

0000h

Burst Mode Type

00 = Not Supported, 01 = Supported

4Ch

0000h

Page Mode Type

00 = Not Supported, 01 = 4 Word Page, 02 = 8 Word Page

4Dh

00B5h

ACC (Acceleration) Supply Minimum

Bits 7–4 = Hex Value in Volts, Bits 0–3 = BCD Value in 100 mV

4Eh

00C5h

ACC (Acceleration) Supply Maximum

Bits 7–4 = Hex Value in Volts, Bits 0–3 = BCD Value in 100 mV

4Fh

000Xh

Top/Bottom Boot Sector Flag

00h = Uniform Sector, No WP# Control

04h = Uniform Sector, WP# Protects Bottom Sector

05h = Uniform Sector, WP# Protects Top Sector

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