AM29LV6402ML100R datasheet(33/57 Pages) SPANSION

33 / 57 page

January 23, 2006

Am29LV6402M

Command Definitions

Table 10.

Command Definitions (x32 Mode, WORD# = V

IH)

Legend:

X = Don’t care

RA = Read Address of the memory location to be read.

RD = Read Data read from location RA during read operation.

PA = Program Address. Addresses latch on the falling edge of the WE#

or CE# pulse, whichever happens later.

PD = Program Data for location PA. Data latches on the rising edge of

WE# or CE# pulse, whichever happens first.

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

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

WBL = Write Buffer Location. Address must be within the same write

buffer page as PA.

DWC = Doubleword Count. Number of write buffer locations to load

minus 1.

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 DQ31–DQ16 are don’t care in command sequences,

except for RD, PD, and DWC.

Unless otherwise noted, address bits A21–A11 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 and/or DQ13

goes high while the device is providing status information.

The fourth cycle of the autoselect command sequence is a read

cycle. Data bits DQ31–DQ16 are don’t care. See the Autoselect

Command Sequence section for more information.

The device ID must be read in three cycles.

10. If WP# protects the highest address sector, the data is 9898h for

factory locked and 1818h for not factory locked. If WP# protects

the lowest address sector, the data is 8888h for factory locked

and 0808h for not factor locked.

11. The total number of cycles in the command sequence is

determined by the number of doublewords written to the write

buffer. The maximum number of cycles in the command

sequence is 21.

12. The data is 0000h for an unprotected sector and 0101h for a

protected sector.

13. Command sequence resets device for next command after

aborted write-to-buffer operation.

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

Bypass Program command.

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

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

16. 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.

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

Suspend mode.

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

device is in autoselect mode.

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

F0F0

Manufacturer ID

555

AAAA

2AA

5555

555

9090

X00

00000101

Device ID (Note 9)

555

AAAA

2AA

5555

555

9090

X01

2222

7E7E

X0E

2222

0C0C

X0F

2222

0101

SecSi

TM Sector Factory Protect

(Note 10)

555

AAAA

2AA

5555

555

9090

X03

(Note 10)

Sector Protect Verify (Note 12)

555

AAAA

2AA

5555

555

9090

(SA)X02

0000/

0101

Enter SecSi Sector Region

555

AAAA

2AA

5555

555

8888

Exit SecSi Sector Region

555

AAAA

2AA

5555

555

9090

XXX

0000

Program

555

AAAA

2AA

5555

555

A0A0

Write to Buffer (Note 11)

555

AAAA

2AA

5555

2525

DWC

WBL

Program Buffer to Flash

2929

Write to Buffer Abort Reset (Note 13)

555

AAAA

2AA

5555

555

F0F0

Unlock Bypass

555

AAAA

2AA

5555

555

2020

Unlock Bypass Program (Note 14)

XXX

A0A0

Unlock Bypass Reset (Note 15)

XXX

9090

XXX

0000

Chip Erase

555

AAAA

2AA

5555

555

8080

555

AAAA

2AA

5555

555

1010

Sector Erase

555

AAAA

2AA

5555

555

8080

555

AAAA

2AA

5555

3030

Program/Erase Suspend (Note 16)

XXX

B0B0

Program/Erase Resume (Note 17)

XXX

3030

CFI Query (Note 18)

9898

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