L640GU53RI datasheet(26/55 Pages) AMD

26 / 55 page

Am29LV641G

June 14, 2005

ADV ANCE

I N FO RMAT I O N

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 defines the valid register command

sequences. Writing incorrect address and data val-

ues or writing them in the improper sequence may

place the device in an unknown state. A reset com-

mand is then required to return 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 the AC Characteristics section for timing

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

w h ic h t he s y s t em c an read data from 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 the Erase Suspend/Erase Resume

Commands section for more information.

The system must issue the reset command to return

the device to the read (or erase-suspend-read) mode

if DQ5 goes high during an active program or erase

operation, or if the device is in the autoselect mode.

See the next section, Reset Command, for more infor-

mation.

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

0004h

Address Sensitive Unlock (Bits 1-0)

0 = Required, 1 = Not Required

Silicon Revision Number (Bits 5-2)

46h

0002h

Erase Suspend

0 = Not Supported, 1 = To Read Only, 2 = To Read & Write

47h

0004h

Sector Protect

0 = Not Supported, X = Number of sectors in per group

48h

0001h

Sector Temporary Unprotect

00 = Not Supported, 01 = Supported

49h

0004h

Sector Protect/Unprotect scheme

04 = 29LV800 mode

4Ah

0000h

Simultaneous Operation

00 = Not Supported, X = 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

00h = Not Supported, D7-D4: Volt, D3-D0: 100 mV

4Eh

00C5h

ACC (Acceleration) Supply Maximum

00h = Not Supported, D7-D4: Volt, D3-D0: 100 mV

4Fh

00XXh

00h = Uniform sector device

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