Datasheet > ELM329LSS

ELM329LSS

更新时间： 2024-11-02 01:14:59

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ELM		/
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描述
Fully configurable with AT commands

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ELM329LSS 数据手册

ELM329L

CAN Interpreter

Description

Features

The ELM329L is a low voltage version of our

• Works with a 2.0V to 5.5V supply

• Universal serial (RS232) interface

• Fully configurable with AT commands

• Compatible with the popular ELM327

• Low power CMOS design

popular ELM329 integrated circuit. It supports all of

the features of our current ELM329 IC, and only

differs physically in how pin 6 is used.

The following pages discuss the ELM329L in

detail, how to use it and how to configure it, as well

as providing some background information on the

protocols that are supported. There are also

schematic diagrams and tips to help you to interface

to microprocessors, construct a basic scan tool, and

to use the low power mode. Because of the similarity

with the ELM329, much of this data sheet has been

copied from the ELM329 data sheet.

Connection Diagram

PDIP and SOIC

(top view)

MCLR

Vmeasure

Active LED

Control

Memory

Filter Cap

LFmode

VSS

OBD Tx LED

Throughout this document, we will use the term

‘ELM329’ to refer to either the ELM329 or the

ELM329L. If there is something different between

the two, we will be specific as to which it applies to.

OBD Rx LED

RS232 Tx LED

RS232 Rx LED

CAN Rx

CAN Tx

Applications

• Diagnostic trouble code readers

• Automotive scan tools

• Teaching aids

XT1

VDD

XT2

VSS

CAN Monitor

In1

RS232 Rx

RS232 Tx

PwrCtrl / Busy

IgnMon / RTS

In2

PwrCtrl

Block Diagram

LFmode

Memory

RS232Rx

RS232Tx

CAN Rx

RS232

Interface

Protocol

Interpreter

CAN

Interface

CAN Tx

ISO 15765-4

SAE J1939

ISO 11898

4.00 MHz

Vmeasure

MCLR

CAN Monitor

IgnMon / RTS

In1

I/O

Module

VDD

Filter Cap

VSS

In2

Control

Module

Control

PwrCtrl / Busy

PwrCtrl

VSS

27 28

status LEDs

ELM329L DSA

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