LH28F016SC-L Ver la hoja de datos (PDF) - Sharp Electronics

Número de pieza

componentes Descripción

Fabricante

LH28F016SC-L

16 M-bit (2 MB x 8) SmartVoltage Flash Memories

Sharp Electronics 

1 INTRODUCTION

This datasheet contains LH28F016SC-L/SCH-L

specifications. Section 1 provides a flash memory

overview. Sections 2, 3, 4, and 5 describe the

memory organization and functionality. Section 6

covers electrical specifications. LH28F016SC-L/

SCH-L flash memories documentation also includes

ordering information which is referenced in

Section 7.

1.1 New Features

The LH28F016SC-L/SCH-L SmartVoltage flash

memories maintain backwards-compatibility with the

LH28F008SA. Key enhancements over the

LH28F008SA include :

• SmartVoltage Technology

• Enhanced Suspend Capabilities

• In-System Block Locking

Both devices share a compatible pinout, status

register, and software command set. These

similarities enable a clean upgrade from the

LH28F008SA to LH28F016SC-L/SCH-L. 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 software 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.

1.2 Product Overview

The LH28F016SC-L/SCH-L are high-performance

16 M-bit SmartVoltage flash memories organized

as 2 M-byte of 8 bits. The 2 M-byte of data is

LH28F016SC-L/SCH-L

arranged in thirty-two 64 k-byte blocks which are

individually erasable, lockable, and unlockable in-

system. The memory map is shown in Fig. 1.

SmartVoltage technology provides a choice of VCC

and VPP combinations, as shown in Table 1, to

meet system performance and power expectations.

2.7 V VCC consumes approximately one-fifth the

power of 5 V VCC and 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 eliminates the need for a

separate 12 V converter, while VPP = 12 V

maximizes block erase and byte write performance.

In addition to flexible erase and program voltages,

the dedicated VPP pin gives complete data

protection when VPP ≤ VPPLK.

Table 1 VCC and VPP Voltage Combinations

Offered by SmartVoltage Technology

VCC VOLTAGE

2.7 V (NOTE 1)

3.3 V

5V

VPP VOLTAGE

—

3.3 V, 5 V, 12 V

5 V, 12 V

NOTE :

1. Block erase, byte write and lock-bit configuration

operations with VCC < 3.0 V are not supported.

Internal VCC and VPP detection circuitry auto-

matically configures the device for optimized read

and write operations.

A Command User Interface (CUI) serves as the

interface between the system processor and

internal operation of the device. A valid command

sequence written to the CUI initiates device

automation. An internal Write State Machine (WSM)

automatically executes the algorithms and timings

necessary for block erase, byte write, and lock-bit

configuration operations.

A block erase operation erases one of the device’s

64 k-byte blocks typically within 1 second (5 V VCC,

-5-

Share Link: