M49000000G datasheet(32/64 Pages) AMD

32 / 64 page

June 25, 2002

Am49DL320BG

P R E L I M I NARY

Table 14.

Command Definitions (Flash Byte Mode)

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#f pulse, whichever happens

later.

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

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

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

erased. Address bits A20–A12 uniquely select any sector.

BA = Address of the bank that is being switched to autoselect mode, is

in bypass mode, or is being erased.

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 A20–A12 are don’t cares.

No unlock or command cycles required when bank is in read

mode.

The Reset command is required to return to reading array data

(or to the erase-suspend-read mode if previously in Erase

Suspend) when a bank is in the autoselect mode, or if DQ5 goes

high (while the bank is providing status information).

The fourth cycle of the autoselect command sequence is a read

cycle. The system must provide the bank address to obtain the

manufacturer ID, device ID, or SecSi Sector factory protect

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

Autoselect Command Sequence section for more information.

The device ID must be read across three cycles. The device ID is

00h for top boot and 01h for bottom boot.

10. The data is 82h for factory locked and 02h for not factory locked.

11. The data is 00h for an unprotected sector/sector block and 01h

for a protected sector/sector block.

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

Bypass Program command.

13. The Unlock Bypass Reset command is required to return to

reading array data when the bank is in the unlock bypass mode.

14. 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, and requires the bank address.

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

Suspend mode, and requires the bank address.

16. 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

Manufacturer ID

AAA

555

(BA)

AAA

(BA) 00

Device ID (Note 9)

AAA

555

(BA)

AAA

(BA) 02

(BA)

00/01

SecSi

 Sector Factory Protect

(Note 10)

AAA

555

(BA)

AAA

(BA)

X06

82/02

Sector Protect Verify

(Note 11)

AAA

555

(BA)

AAA

(SADD)

X04

Enter SecSi Sector Region

AAA

555

AAA

Exit SecSi Sector Region

AAA

555

AAA

XXX

Program

AAA

555

AAA

Unlock Bypass

AAA

555

AAA

Unlock Bypass Program (Note 12)

XXX

Unlock Bypass Reset (Note 13)

XXX

Chip Erase

AAA

555

AAA

555

AAA

Sector Erase

AAA

555

AAA

555

SADD

Erase Suspend (Note 14)

Erase Resume (Note 15)

CFI Query (Note 16)

M49000000G Datasheet(PDF) 32 Page - Advanced Micro Devices

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