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EVM Setup and Operation

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6

SLLU296 – August 2018

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Copyright © 2018, Texas Instruments Incorporated

TCAN1046V Evaluation Module

2.1.6

STBY inputs (J9/J4, TP2/TP14)

Pins 8 and 14 of the device are the STBY inputs. These pins are one way of controlling the state of the
receiver. STBY1 is routed to J4 or TP2. J4 allows the selection of VCC or GND to connect to the STBY1
pin, while TP2 is just for observation. STBY2 is routed to J9 or TP14. J9 allows the selection of VCC or
GND to connect to the STBY2 pin, while TP14 is just for observation.

2.1.7

Bus Observation (J1 or J7)

The CANH and CANL lines are available to be observed on an oscilloscope via the J1 or J7 headers. The
CAN1 bus is routed to the J1 header, with CANH on pin 3, CANL on pin 4, and pins 1, 2, 5, and 6
connected to GND. The CAN2 bus is routed to the J7 header, with CANH on pin 3, CANL on pin 4, and
pins 1, 2, 5, and 6 connected to GND.

2.1.8

Bus protection

Footprints for ESD protection diodes are available on both CAN buses. D1 and D2 are both in the SOT-23
package, which is a common package for ESD protection diodes for CAN interfaces.

2.1.9

TP3 Configuration

This connects directly to device pin 8. Ensure JMP1 configuration is not conflicting if TP3 is used as the
input connection.

2.1.10

Pin 5 (JMP6, JMP2 or TP8)

Pin 5 of the transceiver have various uses depending on the transceiver. Examples are V

REF

, SPLIT, V

RXD

,

V

IO

, LBK, EN, AB and No Connect (NC). Pin 5 of the device is routed to JMP6, JMP2 and TP8.

2.1.11

Pin 5 – JMP6 Configurations (4-Way Jumper)

If using separate I/O inputs, JMP6 is used to configure pin 5 to: pullup to V

CC

, pulldown to GND, V

RXD

or

V

IO

supply input, or V

REF

or SPLIT termination output.

V

REF

or SPLIT termination:

If the device and application support split termination, set JMP6 to V

CM

(V

common mode) to drive the V

REF

or SPLIT pin common mode stabilizing voltage output to the center

tap of the split termination capacitor. Install these components on the EVM as outlined in the CAN bus
termination section.

No Connection:

If the device and application require no use of pin 5, leave it open. If the device has

the V

REF

or SPLIT pin but the application is not using the pin for split termination then add a capacitor

on C6 to improve EMC performance.

2nd Mode or Control Input:

if the device and application use pin 5 as a second mode or control pin,

then set JMP6 as either a pullup to V

CC

or pulldown to GND, as necessary.

I/O and RXD level-shifting supply:

if the device and application used with V

IO

or V

RXD

to level shift I/O

pins on the transceiver then set JMP6 to V

RXD

connecting pin 5 of the device to the V

RXD

pin on JMP2.

Install local buffering and bypass capacitor C6.

2.1.12

JMP2 Configuration

Using header JMP2 assumes all the digital I/O signals, V

CC

, and GND are routed to an external system.

Ensure that pin 5 (JMP6) jumper settings are not conflicting with signals to JMP2. For power supply V

RXD

,

set the jumper to route JMP2 supply input to the transceiver pin.

2.1.13

TP8 Configuration

This connects directly to device pin 5. Ensure JMP6 configuration is not conflicting if TP8 is used as an
input connection.

Summary of Contents for TCAN1046V

Page 1: ...TCAN1046V This user guide explains the EVM configurations for basic CAN evaluation and various load and termination settings Contents 1 Introduction 2 2 EVM Setup and Operation 5 3 CAN EVM Configurat...

Page 2: ...components as well as both CAN interfaces on the device separately 1 2 CAN EVM The TCAN1046V EVM has simple connections to all necessary pins of the CAN transceiver device and jumpers where necessary...

Page 3: ...P GND 0 1 F C8 DNP 0 1 F C10 DNP TP11 TP8 TXD1 1 GND 2 VCC 3 RXD1 4 GND 5 TXD2 6 RXD2 7 STB2 8 CANL2 9 CANH2 10 VIO 11 CANL1 12 CANH1 13 STB1 14 U1 TCAN1046VDRQ1 J4_STB1 CH1_L1 CL1_L1 CH2_B CL2_B CH1_...

Page 4: ...he CAN2 bus Use in combination with J3 to represent the combined 60 CAN termination J7 6 pin header Used to monitor CANH and CANL on CAN2 GND connections available as well J8 2 pin jumper Used to plac...

Page 5: ...2 J5 Pin Definitions Pin Connection Description 1 GND Pin 2 and 5 of the transceiver GND 2 VCC Pin 3 of the transceiver VCC 3 GND Pin 2 and 5 of the transceiver GND 4 VIO Pin 11 of the transceiver VIO...

Page 6: ...routed to JMP6 JMP2 and TP8 2 1 11 Pin 5 JMP6 Configurations 4 Way Jumper If using separate I O inputs JMP6 is used to configure pin 5 to pullup to VCC pulldown to GND VRXD or VIO supply input or VRE...

Page 7: ...Footprints CAN1 Split Terminati on Footprints CAN2 J2 J3 J6 J8 R3 R7 R15 R21 C3 C12 Standard termination 120 shorted open N A N A N A 60 load electrical parameterics shorted shorted Split termination...

Page 8: ...e EVM is being used as a CAN node Each digital input or output pin has footprints allowing for series current limiting resistors default populated with 0 pull up or down resistors depending on pin use...

Page 9: ...L2 GND2 VIO BIAS UNIT VCC 10 9 Low Power Standby Bus Receiver Monitor 6 8 DOMINANT TIME OUT VIO OVER TEMP DRIVER WAKE UP LOGIC MONITOR MUX LOGIC OUTPUT MODE AND CONTROL LOGIC 4 5 UNDER VOLTAGE VIO BIA...

Page 10: ...set forth above or credit User s account for such EVM TI s liability under this warranty shall be limited to EVMs that are returned during the warranty period to the address designated by TI and that...

Page 11: ...the antenna types listed in the user guide with the maximum permissible gain and required antenna impedance for each antenna type indicated Antenna types not included in this list having a gain great...

Page 12: ...t the EVM user guide prior to connecting any load to the EVM output If there is uncertainty as to the load specification please contact a TI field representative During normal operation even with the...

Page 13: ...OST OF REMOVAL OR REINSTALLATION ANCILLARY COSTS TO THE PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES RETESTING OUTSIDE COMPUTER TIME LABOR COSTS LOSS OF GOODWILL LOSS OF PROFITS LOSS OF SAVINGS LOSS OF...

Page 14: ...TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TO ANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTY RIGHT OF TI OR ANY THIRD...

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