Datasheet

CAN Bus Analyzer User’s Guide
DS51848B-page 12  2011 Microchip Technology Inc.
1.4 CAN BUS ANALYZER HARDWARE FEATURES
The CAN BUS Analyzer hardware is a compact tool that includes the following hard-
ware features. Refer to Section 1.5 “CAN BUS Analyzer Software” for more informa-
tion about the software features.
FIGURE 1-1: CAN BUS ANALYZER
• Mini USB Connector
This connector provides the CAN BUS Analyzer a communication medium to the
PC, but it can also provide a power supply if the external power supply is not
plugged into the CAN BUS Analyzer.
• 9-24 Volt power supply connector
When powered by the external power supply, the tool can be set up to disconnect
from the PC to act as a periodic transmitter for CAN BUS messages. The tool
can also be set up to send out a pulse upon reception of certain CAN messages,
which is useful during development or debugging issues with an oscilloscope.
• DB9 connector for the CAN BUS
• Termination Resistor (software controllable)
The user can turn ON or OFF the 120 ohm CAN bus termination through the PC
GUI.
•Status LEDs
Displays the USB status.
• Trigger LED
Future functionality.
• CAN Traffic LEDs
Shows the actual RX CAN BUS traffic from the high speed transceiver.
Shows the actual TX CAB BUS traffic from the high speed transceiver.
• CAN BUS Error LED
Shows the Error Active (Green), Error Passive (Yellow), Bus Off (Red) state of
the CAN BUS Analyzer.
• Direct access to the CAN H and CAN L pin through a screw terminal
Allows the user access to the CAN bus for connecting an oscilloscope without
having to modify the CAN BUS wire harness.
• Direct access to the CAN TX and CAN RX pins through a screw terminal
Allows the user access to the digital side of the CAN BUS transceiver.