Datasheet > ELM329SM

ELM329SM

更新时间： 2024-09-27 11:46:03

品牌	Logo	应用领域
ELM		/
页数	文件大小	规格书
76页	353K
描述
CAN Interpreter

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数据手册

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ELM329SM 数据手册

ELM329

CAN Interpreter

Description

Features

Since 1996, most vehicles have been required

• Power Control with standby mode

• High speed RS232 interface

to monitor their own emissions performance and to

report on it through an On-Board Diagnostics (OBD)

port. Initially, several different protocols were used

for the transfer of OBD data, but since the 2008

model year (in North America), only one protocol has

been allowed - the ISO 15765-4 CAN standard.

• Automatically searches for protocols

• Fully configurable with AT commands

• Pin compatible with the ELM327

• Low power CMOS design

The ELM329 is a device that can translate the

data from an ISO 15765-4 interface into a form that

may be readily used by computers, smart phones, or

other devices. In addition, the ELM329 provides

support for several other CAN protocols (including

the SAE J1939 truck and bus standard), and for

sending periodic messages, mixed ID messages,

and for monitoring the CAN bus, to name only a few.

Connection Diagram

PDIP and SOIC

(top view)

MCLR

Vmeasure

Active LED

Control

Memory

Baud Rate

LFmode

VSS

OBD Tx LED

The following pages discuss the ELM329’s

features in detail, how to use it and configure it, as

well as providing some background information on

the protocols that are supported. There are also

schematic diagrams, and circuit construction tips.

OBD Rx LED

RS232 Tx LED

RS232 Rx LED

CAN Rx

CAN Tx

Applications

XT1

VDD

• Diagnostic trouble code readers

• Automotive scan tools

• Teaching aids

XT2

VSS

CAN Monitor

In1

RS232 Rx

RS232 Tx

PwrCtrl / Busy

IgnMon / RTS

In2

PwrCtrl

Block Diagram

4.00 MHz

MCLR

Baud Rate

LFmode

CAN Module

ISO 15765-4, SAE J1939

ISO 11898

CAN Rx

RS232Rx

RS232Tx

RS232

Interface

CAN Tx

Command

and

Protocol

Interpreter

PwrCtrl / Busy

IgnMon / RTS

PwrCtrl

Power

Control

Vmeasure

In1

Control

Module

In2

CAN Monitor

/ A LED

CAN

Monitor

Control

27 28

status LEDs

Memory

ELM329DSB

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