ELM329L

ELM329L CAN Interpreter Description The ELM329L is a low voltage version of our 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. 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. Applications Diagnostic trouble code readers Automotive scan tools Teaching aids Block Diagram LFmode 7 MCLR 1 4.00 MHz 9 10 RS232Rx 18 RS232Tx 17 RS232 Interface PwrCtrl / Busy 16 IgnMon / RTS 15 PwrCtrl 14 Power Control Command and Protocol Interpreter CAN Monitor 11 CAN Monitor 5 Memory Features 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 Connection Diagram PDIP and SOIC (top view) MCLR Vmeasure Active LED Control Memory Filter Cap LFmode VSS XT1 XT2 CAN Monitor In1 In2 PwrCtrl OBD Tx ...