Datasheet

SENSOR

MICRO

CONTROLLER

SN65HVD101

VCC_ IN

VCC_ SET

PWR_OK

CUR_OK

WAKE

LIM ADJ

L+

L–

GND

IOLINK

MASTER

EVM Setup and Precautions

www.ti.com

JMP1 sets the current limit. Placing a shunt across 20K (pins 1-2) on JMP1 limits the current at the CQ

pin to 100 mA. Placing a shunt across GND (pins 3-4) on JMP1 limits the current to 400 mA. When

working with the SN65HVDHVD102 EVM, leave the shunt off and provide the 3.3-V or 5-V supply to the

VCC_IN terminal.

Microcontroller / IO-LINK Interface Signals

From the microcontroller, connect the EN (enable) signal to the EN post on JMP5, the microcontroller TX

signal to the EVM TX post on JMP4, the RX signal to the RX post on JMP3. Connect the master’s WAKE

signal to the WAKE post on JMP9, and the master CUR_OK signal to the CURR_OK post on JMP9. An

example is shown below in Figure 3.

Figure 3. IO-Link Application Example

3.2 EVM Jumper Settings

Table 1. EVM Jumper Settings

Jumper Description Setting Result

JMP1 CQ current limit adjust OPEN NA

20K – GND 100mA (Default)

POT-GND 400mA

JMP2 Power Supply Selection OPEN 5V Supply

VCC_SET – GND 3.3V Supply (Default)

VCC_SET – VCC_IN 5V Supply (internal pull-up on VCC_SET)

JMP3 RX Input OPEN RX signal to microcontroller

JMP4 TX Input OPEN TX signal to microcontroller

JMP5 Driver Enable/Disable VCC_IN – EN Driver is enabled

EN – GND Driver is disabled

JMP8 HVD101 - Voltage Sense VCC_IN – VCC_OUT Voltage Sense Feedback for the HVD101 internal voltage

Feedback regulator

HVD102 - Input Voltage OPEN VCC_IN = Supplied Vcc

Supply

JMP9 Microcontroller interface Contact pins for interfacing with a microcontroller

SN65HVD101 and SN65HVD102 EVM User's Guide SLLU178–February 2013

Submit Documentation Feedback