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www.ti.com 2 EVM Setup and Operation
2 2 EVM Setup and Operation
This section describes the setup and operation of the EVM for parameter performance evaluation.
2.1 Overview & Basic Operation Settings
2.1.1 V
CC
Power Supply (TB1 or TP9 or JMP2)
The basic setup of the CAN EVM uses a single power supply required to evaluate standard 5V or 3.3V
single supply transceiver devices performance. For single-supply transceivers, connect the 5V or 3.3V V
CC
supply to the TB1 jumper header, or the V
CC
and GND test-point loops. The power supplied should meet
the required specification of V
CC
for the transceiver being tested. LED D3 is used to indicate V
CC
presence.
2.1.2 I/O Power Supply V
RXD
or V
IO
(JMP2, JMP6 or TP8)
For devices with I/O level shifting, a second supply pin for the I/O or RXD pin is on Pin 5 of the transceiver
device. A second power supply is needed to test one of these devices and should be connected via JMP2,
JMP6 or TP8. A local buffering and decoupling capacitor should be installed at C6 if the EVM is used for
one of these devices.
2.1.3 Main Supply and I/O Header (JMP2)
All key I/O and supply GND functions are brought to this header. It may be used on either interface to test
equipment or a short cable could be made to connect to either an existing customer application board or
MCU/DSP EVM board for a processor with a CAN controller
Table 2.
Pin Connection Description
1 MODE Pin 8 of Transceiver, normally used for Mode control. Examples: R
S
, S, STB.
2 TXD Pin 1 of Transceiver. TXD (Transmit Data)
3 GND Pin 2 of Transceiver. GND.
4 GND Pin 2 of Transceiver. GND.
5 RXD Pin 4 of Transceiver. RXD (Receive Data)
6 GND Pin 2 of Transceiver. GND.
7 V
CC
Pin 3 of Transceiver. V
CC
8 GND Pin 2 of Transceiver. GND.
Pin 5 of Transceiver, various functions depending on transceiver. Examples: V
REF
,
9 P5
SPLIT, V
RXD
, V
IO
, LBK, EN, AB and No Connect (NC).
Connects to Jumper JMP6 V
RXD
header to allow flexibility in using device with power
10 V
RXD
supply for I/O on Pin 5 of transceiver.
This header is arranged to provide a separate grounds for each signal pair (TXD/GND and RXD/GND). If
the EVM is being used with lab equipment, separate cables can be connected to these main points via
simple 2 pin header connectors.If the board is being connected to a processor based system, a single
cable with all power & signals can be connected via a 10 pin header cable to this port.
2.1.4 TXD Input (JMP2 or TP1)
The TXD (pin 1) of the transceiver, transmit data is routed to JMP2 and TP1. The signal path to the JMP2
header is pre-installed with a 0Ω series resistor, R10.
2.1.5 RXD Output (JMP2 or TP7)
The RXD (pin 4) of the transceiver, receive data is routed to JMP2 and TP7. The signal path to the JMP2
header is pre-installed with a 0Ω series resistor, R13.
5
SLLU158– December 2011 CAN EVM User Guide
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