L320DB12VC datasheet(4/57 Pages) AMD

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Am29LV320D

December 14, 2005

DA TA SH EET

GENERAL DESCRIPTION

The Am29LV320D is a 32 megabit, 3.0 volt-only flash

memory device, organized as 2,097,152 words of 16

bits each or 4,194,304 bytes of 8 bits each. Word

mode data appears on DQ0–DQ15; byte mode data

appears on DQ0–DQ7. The device is designed to be

programmed in-system with the standard 3.0 volt V

supply, and can also be programmed in standard

EPROM programmers.

The device is available with an access time of 90 or

120 ns. The devices are offered in 48-pin TSOP and

48-ball FBGA packages. Standard control pins—chip

enable (CE#), write enable (WE#), and output enable

(OE#)—control normal read and write operations, and

avoid bus contention issues.

The device requires only a single 3.0 volt power sup-

ply for both read and write functions. Internally gener-

ated and regulated voltages are provided for the

program and erase operations.

Am29LV320D Features

The Secured Silicon sector is an extra sector capa-

ble of being permanently locked by AMD or custom-

ers. The Secured Silicon Indicator Bit (DQ7) is

permanently set to a 1 if the part is factory locked,

and set to a 0 if customer lockable. This way, cus-

tomer lockable parts can never be used to replace a

factory locked part. Note that the Am29LV320D has

a Secured Silicon sector size of 64 Kbytes. AMD

devices designated as replacements or substi-

tutes, such as the Am29LV320M, have 256 bytes.

This should be considered during system design.

Factory locked parts provide several options. The Se-

cured Silicon sector may store a secure, random 16

byte ESN (Electronic Serial Number), customer code

(programmed through AMD’s ExpressFlash service),

or both. Customer Lockable parts may utilize the Se-

cured Silicon sector as bonus space, reading and writ-

ing like any other flash sector, or may permanently

lock their own code there.

The device offers complete compatibility with the

JEDEC single-power-supply Flash command set

standard. Commands are written to the command

Reading data out of the device is similar to reading

from other Flash or EPROM devices.

The host system can detect whether a program or

erase operation is complete by using the device sta-

tus bits: RY/BY# pin, DQ7 (Data# Polling) and

DQ6/DQ2 (toggle bits). After a program or erase cycle

is completed, the device automatically returns to the

read mode.

The sector erase architecture allows memory sec-

tors to be erased and reprogrammed without affecting

the data contents of other sectors. The device is fully

erased when shipped from the factory.

Hardware data protection measures include a low

CC detector that automatically inhibits write opera-

tions during power transitions. The hardware sector

protection feature disables both program and erase

operations in any combination of the sectors of mem-

ory. This can be achieved in-system or via program-

ming equipment.

The device offers two power-saving features. When

addresses are stable for a specified amount of time,

the device enters the automatic sleep mode. The

system can also place the device into the standby

mode. Power consumption is greatly reduced in both

modes.

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