L640GU53RI datasheet(31/55 Pages) AMD

31 / 55 page

June 14, 2005

Am29LV641G

ADV ANCE

I N FO RMAT I O N

Command Definitions

Table 10.

Command Definitions

Legend:

X = Don’t care

RA = Address of the memory location to be read.

RD = Data read from location RA during read operation.

PA = Address of the memory location to be programmed. Addresses

latch on the falling edge of the WE# or CE# pulse, whichever happens

later.

PD = Data to be programmed at location PA. Data latches on the rising

edge of WE# or CE# pulse, whichever happens first.

SA = Address of the sector to be verified (in autoselect mode) or

erased. Address bits A21–A15 uniquely select any sector.

Notes:

See Table 1 for description of bus operations.

All values are in hexadecimal.

Except for the read cycle and the fourth cycle of the autoselect

command sequence, all bus cycles are write cycles.

Data bits DQ15–DQ8 are don’t care in command sequences,

except for RD and PD.

Unless otherwise noted, address bits A21–A15 are don’t cares.

No unlock or command cycles required when device is in read

mode.

The Reset command is required to return to the read mode (or to

the erase-suspend-read mode if previously in Erase Suspend)

when the device is in the autoselect mode, or if DQ5 goes high

(while the device is providing status information).

The fourth cycle of the autoselect command sequence is a read

cycle. Data bits DQ15–DQ8 are don’t care. See the Autoselect

Command Sequence section for more information.

If WP# protects the highest address sector, the data is 98h for

factory locked and 18h for not factory locked. If WP# protects the

lowest address sector, the data is 88h for factory locked and 08h

for not factor locked.

10. The data is 00h for an unprotected sector group and 01h for a

protected sector group.

11. The Unlock Bypass command is required prior to the Unlock

Bypass Program command.

12. The Unlock Bypass Reset command is required to return to the

read mode when the device is in the unlock bypass mode.

13. The system may read and program in non-erasing sectors, or

enter the autoselect mode, when in the Erase Suspend mode.

The Erase Suspend command is valid only during a sector erase

operation.

14. The Erase Resume command is valid only during the Erase

Suspend mode.

15. Command is valid when device is ready to read array data or

when device is in autoselect mode.

16. Bottom boot = 2200 and top boot = 2201.

Command

Sequence

(Note 1)

Bus Cycles (Notes 2–5)

First

Second

Third

Fourth

Fifth

Sixth

Addr

Data

Addr

Data

Addr

Data

Addr

Data

Addr

Data

Addr

Data

Read (Note 6)

Reset (Note 7)

XXX

Manufacturer ID

555

2AA

555

X00

0001

Device ID

555

2AA

555

X01

22E7

X0E

220F

X0F

(Note

16)

SecSi

™ Sector Factory

Protect (Note 9)

555

2AA

555

X03

(see

Note 9)

Sector Group Protect Verify

(Note 10)

555

2AA

555

(SA)X02

XX00/

XX01

Enter SecSi Sector Region

555

2AA

555

Exit SecSi Sector Region

555

2AA

555

XXX

Program

555

2AA

555

Unlock Bypass

555

2AA

555

Unlock Bypass Program (Note 11)

XXX

Unlock Bypass Reset (Note 12)

XXX

Chip Erase

555

2AA

555

2AA

555

Sector Erase

555

2AA

555

2AA

Erase Suspend (Note 13)

Erase Resume (Note 14)

CFI Query (Note 15)

L640GU53RI Datasheet(PDF) 31 Page - Advanced Micro Devices

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