AS29LV016 查看數據表（PDF） - Austin Semiconductor

零件编号

产品描述 (功能)

生产厂家

AS29LV016

16 Megabit (2M x 8-Bit / 1M x 16-Bit) CMOS 3.0 Volt-Only Boot Sector Flash Memory

Austin Semiconductor 

COTS PEM

BOOT SECTOR FLASH

Austin Semiconductor, Inc.

AS29LV016

GENERAL DESCRIPTION

The AS29LV016 is a 16 Mbit, 3.0 Volt-only Flash

memory organized as 2,097,152 bytes or

1,048,576 words. The word-wide data (x16)

appears on DQ15–DQ0; the byte-wide (x8) data

appears on DQ7–DQ0. This device is designed to

be programmed in-system with the standard

system 3.0 volt VCC supply. A 12.0 V VPP or 5.0

VCC are not required for write or erase operations.

The device can also be programmed in standard

EPROM programmers.

The device offers access times of 70 ns, 90 ns

and 100 ns allowing high speed microprocessors

to operate without wait states. To eliminate bus

contention the device has separate chip enable

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

(OE#) controls.

The device requires only a single 3.0 volt power

supply for both read and write functions. Internally

generated and regulated voltages are provided

for the program and erase operations.

The AS29LV016 is entirely command set

compatible with the JEDEC single-power-supply

Flash standard. Commands are written to the

command register using standard microprocessor

write timings. Register contents serve as input

to an internal state-machine that controls the

erase and programming circuitry. Write cycles also

internally latch addresses and data needed for

the programming and erase operations. Reading

data out of the device is similar to reading from

other Flash or EPROM devices.

Device programming occurs by executing the

program command sequence. This initiates the

Embedded Program algorithm—an internal

algorithm that automatically times the program

pulse widths and verifies proper cell margin. The

Unlock Bypass mode facilitates faster programming

times by requiring only two write cycles to program

data instead of four.

Device erasure occurs by executing the erase

command sequence. This initiates the Embedded

Erase algorithm—an internal algorithm that

automatically preprograms the array (if it is not

already programmed) before executing the erase

operation. During erase, the device automatically

times the erase pulse widths and verifies proper

cell margin.

The host system can detect whether a program

or erase operation is complete by observing the

RY/BY# pin, or by reading the DQ7 (Data# Polling)

and DQ6 (toggle) status bits. After a program or

erase cycle has been completed, the device is

ready to read array data or accept another

command.

The sector erase architecture allows memory

sectors 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

VCC detector that automatically inhibits write

operations during power transitions. The hardware

sector protection feature disables both program

and erase operations in any combination of the

sectors of memory. This can be achieved in-system

or via programming equipment.

The Erase Suspend/Erase Resume feature enables

the user to put erase on hold for any period of

time to read data from, or program data to, any

sector that is not selected for erasure. True

background erase can thus be achieved.

The hardware RESET# pin terminates any operation

in progress and resets the internal state machine

to reading array data. The RESET# pin may be

tied to the system reset circuitry. A system reset

would thus also reset the device, enabling the

system microprocessor to read the boot-up

firmware from the Flash memory.

The device offers two power-saving features.

When addresses have been 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 these modes.

AS29LV016

Rev. 2.1 10/08

Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.

2

Share Link: