AM29PDS322D datasheet(28/51 Pages) AMD

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Am29PDS322D

23569A5 December 4, 2006

D A TA

SH EE T

Table 10.

Am29PDS322D 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.

SGA = Address of the sector group to be verified (in autoselect mode)

or erased. Address bits A20–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 and fifth 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 in

unlock sequence.

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. 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 the fourth, fifth and sixth

cycles. The sixth cycle specifies 2201h for top boot or 2200h for

bottom boot.

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

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

protected sector group.

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 the

read mode when the device 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

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

Suspend mode, and requires the bank address.

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 (Note 9)

555

2AA

555

X01

227E

X0E

2206

X0F

2201/

2200

SecSi Sector Factory

Protect (Note 10)

555

2AA

555

X03

80/00

Sector Group Protect Verify

(Note 11)

555

2AA

555

(SGA)

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 12)

XXX

Unlock Bypass Reset (Note 13)

XXX

Chip Erase

555

2AA

555

2AA

555

Sector Erase

555

2AA

555

2AA

Erase Suspend (Note 14)

Erase Resume (Note 15)

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