AM29N323DT11AWKI datasheet(3/48 Pages) AMD

Part #	AM29N323DT11AWKI

Description	32 Megabit (2 M x 16-Bit) CMOS 1.8 Volt-only Simultaneous Read/Write, Burst Mode Flash Memory

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Manufacturer	AMD [Advanced Micro Devices]

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Am29N323D

August 8, 2002

GENERAL DESCRIPTION

The Am29N323 is a 32 Mbit, 1.8 Volt-only, simulta-

neous Read/Write, Burst Mode Flash memory device,

organized as 2,097,152 words of 16 bits each. This

device uses a single VCC of 1.7 to 1.9 V to read, pro-

gram, and erase the memory array. A 12.0-volt VPP

may be used for faster program performance if desired.

The device can also be programmed in standard

EPROM programmers.

The Am29N323 provides a burst access of 20 ns at 30

pF with initial access times of 120 ns at 30 pF. The

device operates within the industrial temperature range

of –25

°C to +85°C. The device is offered in the 47-ball

FBGA package.

Simultaneous Read/Write Operations with

Zero Latency

The Simultaneous Read/Write architecture provides

simultaneous operation by dividing the memory

space into two banks. The device can improve overall

system performance by allowing a host system to pro-

gram or erase in one bank, then immediately and si-

multaneously read from the other bank, with zero

latency. This releases the system from waiting for the

completion of program or erase operations.

The device is divided as shown in the following table:

The device uses Chip Enable (CE#), Write Enable

(WE#), Address Valid (AVD#) and Output Enable

(OE#) to control asynchronous read and write opera-

tions. For burst operations, the device additionally

requires Power Saving (PS), Ready (RDY), and Clock

(CLK). This implementation allows easy interface with

minimal glue logic to microprocessors/microcontrollers

for high performance read operations.

The device offers complete compatibility with the

JEDEC 42.4 single-power-supply Flash command

set standard. Commands are written to the command

register using standard microprocessor write timings.

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 bit DQ7 (Data# Polling) and DQ6/DQ2 (toggle

bits). After a program or erase cycle has been com-

pleted, the device automatically returns to reading

array data.

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

VCC detector that automatically inhibits write opera-

tions during power transitions. The device also offers

three types of data protection at the sector level. The

sector lock/unlock command sequence disables or

re-enables both program and erase operations in any

sector. When at VIL, WP# locks the two outermost sec-

tors. Finally, when VPP is at VIL, all sectors are locked.

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 re-

duced in both modes.

Bank A Sectors

Bank B Sectors

Quantity

Size

Quantity

Size

8

4 Kwords

48

32 Kwords

15

32 Kwords

8 Mbits total

24 Mbits total

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