AM29PL320DB70RWPI datasheet(27/49 Pages) AMD

27 / 49 page

June 13, 2005

Am29PL320D

Command Definitions

Table 13.

Command Definitions (Double Word 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# 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:

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–DQ8 are don’t cares for unlock and command

cycles.

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

cycles, unless SA or PA required.

No unlock or command cycles required when reading array data.

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).

The fourth cycle of the autoselect command sequence is a read

cycle.

DQ31–DQ16 output 2222h for device ID reads. The device ID must

be read across the fourth, fifth, and sixth cycles. The sixth cycle

specifies 22222200h for bottom boot devices and 22222201h for top

boot devices.

10. The data is 80h for factory locked and 00h for not factory locked.

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

sector. See “Autoselect Command Sequence” for more information.

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

device is in autoselect mode.

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

Program command.

14. The Unlock Bypass Reset command is required to return to reading

array data when the device is in the unlock bypass mode.

15. 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.

16. 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

555

2AA

555

Device ID (Note 9)

555

2AA

555

227E

2203

2200 2201

SecSi

™ Sector Factory

Protect (Note 10)

555

2AA

(BA)

555

(BA)

X03

(Note 10)

Sector Protect Verify

(Note 11)

555

2AA

555

(SA)

X02

(Note 11)

Enter SecSi Sector Region

555

2AA

555

Exit SecSi Sector Region

555

2AA

555

XXX

CFI Query (Note 12)

Program

555

2AA

555

Unlock Bypass

555

2AA

555

Unlock Bypass Program

(Note 13)

XXX

Unlock Bypass Reset (Note 14)

XXX

Chip Erase

555

2AA

555

2AA

555

Sector Erase

555

2AA

555

2AA

Erase Suspend (Note 15)

XXX

Erase Resume (Note 16)

XXX

Temporary Sector Unprotect

Enable

555

2AA

555

XXX

Temporary Sector Unprotect

Disable

555

2AA

555

XXX

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