LH28F008SC datasheet(2/38 Pages) SHARP

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LH28F008SC

8M (1M × 8) Flash Memory

Figure 3. SOP 44-Pin Configuration

CC VOLTAGE

PP VOLTAGE

3.3 V

3.3 V, 5 V, 12 V

5 V

5 V, 12 V

INTRODUCTION

SHARP’S LH28F008SC FlashFile™ memory with

SmartVoltage technology is a high-density, low-cost, non-

volatile, read/write storage solution for a wide range of

applications. Its symmetrically-blocked architecture, flex-

ible voltage and extended cycling provide for highly flex-

ible component suitable for resident flash arrays, SIMMs

and memory cards.Its enhanced suspend capabilities pro-

vide for an ideal solution for code and data storage appli-

cations. For secure code storage applications, such as

networking, where code is either directly executed out of

flash or downloaded to DRAM, the LH28F008SC offers

three levels of protection: absolute protection with VPP at

GND, selective hardware block locking, or flexible software

block locking. These alternatives give designers ultimate

control of their code security needs.

The LH28F008SC is manufactured on SHARP’s

0.4 µm ETOX™ V process technology. It comes in in-

dustry-standard packages: the 40-pin TSOP, ideal for

board constrained applications, and the rugged 44-pin

SOP. Based on the 28F008SA architecture, the

LH28F008SC enables quick and easy upgrades for

designs demanding the state-of-the art.

New Features

The LH28F008SC SmartVoltage FlashFile memory

maintains backwards-compatiblity with SHARP’S

28F008SA. Key enhancements over the 28F008SA

include:

• SmartVoltageTechnology

• Enhanced Suspend Capabilities

• In-System Block Locking

Both devices share a compatible pinout, status reg-

ister, and software command set. These similarities

enable a clean upgrade from the 28F008SA to

LH28F008SC. When upgrading, it is important to note

the following differences:

• Because of new feature support, the two devices

have different device codes. This allows for soft-

ware optimization.

•VPPLK has been lowered from 6.5 V to 1.5 V to

support 3.3 V and 5 V block erase, byte write, and

lock-bit configuration operations. Designs that

switch VPP off during read operations should make

sure that the VPP voltage transitions to GND.

• To take advantage of SmartVoltage technology,

allow VPP connection to 3.3 V or 5 V.

DESCRIPTION

The LH28F008SC is a high-performance 8M Smart-

Voltage FlashFile memory organized as 1M of 8 bits.The

1M of data is arranged in sixteen 64K blocks which are

individually erasable, lockable, and unlockable in-system.

The memory map is shown in Figure 5.

SmartVoltage technology provides a choice of VCC

and VPP combinations, as shown in theVoltage Combi-

nations Table, to meet system performance and power

expectations. 3.3 V VCC consumes approximately one-

fourth the power of 5 V VCC. But, 5 V VCC provides the

highest read performance. VPP at 3.3 V and 5 V elimi-

nates the need for a separate 12 V converter, while

VPP = 12 V maximizes block erase and byte write per-

formance. In addition to flexible erase and program volt-

ages, the dedicated VPP pin gives complete data

protection when VPP ≤ VPPLK.

VCC and VPP Voltage Combinations

Offered by SmartVoltage Technology

28F008SC-2

TOP VIEW

44-PIN SOP

A10

VPP

A11

A12

A13

A14

A15

A16

A17

A18

A19

RY/BY

DQ7

DQ6

DQ5

DQ3

DQ2

DQ1

DQ0

DQ4

VCC

GND

VCC

LH28F008SC 数据表(PDF) 2 Page - Sharp Corporation

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