S71AL016M datasheet(14/68 Pages) SPANSION

14 / 68 page

S71AL016M

S71AL016M_M0 A0 February 23, 2005

Advanc e

Informatio n

General Description

The S29AL016M is a 16 Mbit, 3.0 Volt-only Flash memory organized as

1,048,576 words. The word-wide data (x16) appears on DQ15–DQ0. The device

requires only a single 3.0 volt power supply for both read and write func-

tions, designed to be programmed in-system with the standard system 3.0 volt

V CC supply. The device can also be programmed in standard

EPROM programmers.

To eliminate bus contention the device contains separate chip enable (CE#),

write enable (WE#) and output enable (OE#) controls.

The device is entirely command set compatible with the JEDEC single-power-

supply Flash standard. Commands are written to the device using standard

microprocessor write timing. Write cycles also internally latch addresses and

data needed for the programming and erase operations.

The sector erase architecture allows memory sectors to be erased and repro-

grammed without affecting the data contents of other sectors. The device is fully

erased when shipped from the factory.

Device programming and erasure are initiated through command sequences.

Once a program or erase operation begins, the host system need only poll the

DQ7 (Data# Polling) or DQ6 (toggle) status bits or monitor the Ready/Busy#

(RY/BY#) output to determine whether the operation is complete. To facilitate

programming, an Unlock Bypass mode reduces command sequence overhead

by requiring only two write cycles to program data instead of four.

Hardware data protection measures include a low VCC detector that automat-

ically inhibits write operations during power transitions. The hardware sector

protection feature disables both program and erase operations in any combina-

tion of sectors of memory. This can be achieved in-system or via programming

equipment.

The Erase Suspend/Erase Resume feature allows the host system to pause

an erase operation in a given sector to read or program any other sector and

then complete the erase operation. The Program Suspend/Program Resume

feature enables the host system to pause a program operation in a given sector

to read any other sector and then complete the program operation.

The hardware RESET# pin terminates any operation in progress and resets

the device, after which it is then ready for a new operation. The RESET# pin

may be tied to the system reset circuitry. A system reset would thus also reset

the device, enabling the host system to read boot-up firmware from the Flash

memory device.

The device reduces power consumption in the standby mode when it detects

specific voltage levels on CE# and RESET#, or when addresses are stable for a

specified period of time.

The SecSi™ (Secured Silicon) Sector provides a 128-word area for code or

data that can be permanently protected. Once this sector is protected, no fur-

ther changes within the sector can occur.

MirrorBit flash technology combines years of Flash memory manufacturing ex-

perience to produce the highest levels of quality, reliability and cost

effectiveness. The device electrically erases all bits within a sector simulta-

neously via hot-hole assisted erase. The data is programmed using hot electron

injection.

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