MT28F320J3RG-15ET 데이터 시트보기 (PDF) - Micron Technology

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MT28F320J3RG-15ET

Q-FLASH™ MEMORY

Micron Technology 

GENERAL DESCRIPTION

The MT28F128J3 is a nonvolatile, electrically block-

erasable (Flash), programmable memory containing

134,217,728 bits organized as 16,777,218 bytes (8 bits)

or 8,388,608 words (16 bits). This 128Mb device is orga-

nized as one hundred twenty-eight 128KB erase blocks.

The MT28F640J3 contains 67,108,864 bits organized

as 8,388,608 bytes (8 bits) or 4,194,304 words (16 bits).

This 64Mb device is organized as sixty-four 128KB erase

blocks.

Similarly, the MT28F320J3 contains 33,554,432 bits

organized as 4,194,304 bytes (8 bits) or 2,097,152 words

(16 bits). This 32Mb device is organized as thirty-two

128KB erase blocks.

These three devices feature in-system block lock-

ing. They also have common flash interface (CFI) that

permits software algorithms to be used for entire fami-

lies of devices. The software is device-independent,

JEDEC ID-independent with forward and backward

compatibility.

Additionally, the scalable command set (SCS) al-

lows a single, simple software driver in all host systems

to work with all SCS-compliant Flash memory devices.

The SCS provides the fastest system/device data trans-

fer rates and minimizes the device and system-level

implementation costs.

To optimize the processor-memory interface, the

device accommodates VPEN, which is switchable during

block erase, program, or lock bit configuration, or

hardwired to VCC, depending on the application. VPEN is

treated as an input pin to enable erasing, program-

ming, and block locking. When VPEN is lower than the

VCC lockout voltage (VLKO), all program functions are

disabled. Block erase suspend mode enables the user

to stop block erase to read data from or program data to

any other blocks. Similarly, program suspend mode

enables the user to suspend programming to read data

or execute code from any unsuspended blocks.

VPEN serves as an input with 2.7V, 3.3V, or 5V for

application programming. VPEN in this Q-Flash family

128Mb, 64Mb, 32Mb

Q-FLASH MEMORY

can provide data protection when connected to ground.

This pin also enables program or erase lockout during

power transition.

Micron’s even-sectored Q-Flash devices offer indi-

vidual block locking that can lock and unlock a block

using the sector lock bits command sequence.

Status (STS) is a logic signal output that gives an

additional indicator of the internal state machine (ISM)

activity by providing a hardware signal of both status

and status masking. This status indicator minimizes

central processing unit (CPU) overhead and system

power consumption. In the default mode, STS acts as

an RY/BY# pin. When LOW, STS indicates that the ISM

is performing a block erase, program, or lock bit con-

figuration. When HIGH, STS indicates that the ISM is

ready for a new command.

Three chip enable (CE) pins are used for enabling and

disabling the device by activating the device’s control

logic, input buffer, decoders, and sense amplifiers.

BYTE# enables selecting x8 or x16 READs/WRITEs

to the device. BYTE# at logic LOW selects an 8-bit mode

with address A0 selecting between the low byte

and the high byte. BYTE# at logic HIGH enables 16-bit

operation.

RP# is used to reset the device. When the device is

disabled and RP# is at VCC, the standby mode is en-

abled. A reset time (tRWH) is required after RP#

switches HIGH until outputs are valid. Likewise, the

device has a wake time (tRS) from RP# HIGH until

WRITEs to the command user interface (CUI) are rec-

ognized. When RP# is at GND, it provides write protec-

tion, resets the ISM, and clears the status register.

A variant of the MT28F320J3 also supports the new

security block lock feature for additional code security.

This feature provides an OTP function for locking the

top two blocks, the bottom two blocks, or the entire

device. (Contact factory for availability.)

128Mb, 64Mb, 32Mb Q-Flash Memory

MT28F640J3_7.p65 – Rev. 6, Pub. 8/02

2

Micron Technology, Inc., reserves the right to change products or specifications without notice.

©2002, Micron Technology, Inc.

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