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93LC66: 产品描述Lowpower 3-wire non-volatile memories; 文件大小87KB，共22页; 制造商Microchip(微芯科技); 官网地址https://www.microchip.com

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93LC66概述

Lowpower 3-wire non-volatile memories

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Using the 93LC56 and 93LC66

AN560

Using the 93LC56 and 93LC66

INTRODUCTION

The Microchip Technology Inc. 93LC56/66 are low-

power 3-wire non-volatile memories and are suitable for

many embedded system code and data storage applica-

tions. These devices are easily interfaced to most micro-

controllers in today's market place, but Microchip’s 8-bit

RISC series PIC16CXX offers the best code density of

any microcontroller on the market today. Using the

PIC16C54, the assembly programs contained in this

application note have been fully tested and provide the

correct timing and 3-wire sequences to fully operate the

93LC56/66 in a PIC16CXX-based embedded applica-

tion. The PIC16C54 was clocked at a 10MHz frequency.

This application note is intended to provide the engineer

with readily available stand-alone code modules to

accomplish all of the necessary functions to utilize these

devices in a low power application using the efficient

PIC16C54 microcontroller.

The 93 series of devices have essentially four I/O pins:

CLK

Chip Select

Clock

Data In

Data Out

3-Wire Byte Write Program

– Delay Routine

– Start Bit Routine

– Bit Out Routine

– Transmit Data Routine

– Power-up Routine

– Erase/Write Enable Routine (EWEN)

– Byte Write Routine

– Erase/Write Disable Routine (EWDS)

3-Wire Byte Write with Data Polling Program

– Data Polling Delay Routine

– Start Bit Routine

– Bit Out Routine

– Transmit Data Routine

– Power-up Routine

– Erase/Write Enable Routine

– Write Routine

– Erase/Write Disable Routine (EWDS)

This series of devices use a series of commands to

accomplish the normal memory functions. These are

READ, WRITE, EWEN, ERASE, ERAL, WRAL, EWDS.

For a more detailed discussion of the function of these

devices reference the appropriate data sheet and AN536,

also published by Microchip Technology.

The following programs are included in this application

note and are fully functional stand-alone modules. They

are intended for use by those who are not already

familiar with interfacing a PIC16CXX microcontroller to

a 93 series device. For those with more experience,

please refer to application note AN530.

3-Wire Sequential Read Program

– Delay Routine

– Start Bit Routine

– Bit In Routine

– Receive Data Routine

– Bit Out Routine

– Transmit Data Routine

– Power-up Routine

– Read Routine

3-Wire Byte Read Program

– Start Bit Routine

– Receive Data Routine

– Bit Out Routine

– Transmit Data Routine

– Power-up Routine

– Read Routine

Author:

Bruce Negley

Memory Products Division

DS00560D-page 1

8-99

93LC66相似产品对比

	93LC66	93LC56	AN560
描述	Lowpower 3-wire non-volatile memories	Lowpower 3-wire non-volatile memories	Lowpower 3-wire non-volatile memories

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