L160DB90VC datasheet(26/52 Pages) AMD

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Am29LV160D

May 5, 2006 22358B7

DA TA

SH EET

Command Definitions

Table 9.

Am29LV160D 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 A19–A12 uniquely select any sector.

Notes:

1. See Table 1 for description of bus operations.

2. All values are in hexadecimal.

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

command sequence, all bus cycles are write cycles.

4. Data bits DQ15–DQ8 are don’t cares for unlock and command

cycles.

5. Address bits A19–A11 are don’t cares for unlock and

command cycles, unless SA or PA required.

6. No unlock or command cycles required when reading array

data.

7. The Reset command is required to return to reading array data

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

(while the device is providing status data).

8. The fourth cycle of the autoselect command sequence is a

read cycle.

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

protected sector. See “Autoselect Command Sequence” for

more information.

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

when device is in autoselect mode.

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

reading array data 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.

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

Word

555

2AA

555

X00

Byte

AAA

555

AAA

Device ID,

Top Boot Block

Word

555

2AA

555

X01

22C4

Byte

AAA

555

AAA

X02

Device ID,

Bottom Boot Block

Word

555

2AA

555

X01

2249

Byte

AAA

555

AAA

X02

Sector Protect Verify

(Note 9)

Word

555

2AA

555

(SA)

X02

XX00

XX01

Byte

AAA

555

AAA

(SA)

X04

CFI Query (Note 10)

Word

Byte

Program

Word

555

2AA

555

Byte

AAA

555

AAA

Unlock Bypass

Word

555

2AA

555

Byte

AAA

555

AAA

Unlock Bypass Program (Note 11)

XXX

Unlock Bypass Reset (Note 12)

XXX

Chip Erase

Word

555

2AA

555

2AA

555

Byte

AAA

555

AAA

555

AAA

Sector Erase

Word

555

2AA

555

2AA

Byte

AAA

555

AAA

555

Erase Suspend (Note 13)

XXX

Erase Resume (Note 14)

XXX

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