Texas Instruments TPS22985EVM, User Manual, Page: 2 / 19

Introduction
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1 Introduction
1.1 Setup
This section describes the jumpers and connectors on the EVM as well and how to properly connect, set
up, and use the TPS22985EVM.
1.2 Power Supply Inputs
Table 2 shows the voltage input that should be applied in different places of the EVM.
Table 2. Input Supply Configuration
Test Device +3.3V (V) VDD1(V) VDD2(V) ENB(V) CFG/OE(V)
Normal Mode
1 TPS22985 3.3V 3.3V 0V 0V Open or 3.3V
2 TPS22985 3.3V 3.3V 0V 3.3V Open or 3.3V
3 TPS22985 3.3V 12-18V 3.3V 0V Open or 3.3V
4 TPS22985 3.3V 12-18V 3.3V 3.3V Open or 3.3V
5 TPS22985 3.3V 3.3V 12-18V 0V Open or 3.3V
6 TPS22985 3.3V 3.3V 12-18V 3.3V Open or 3.3V
Control Mode
7 TPS22985 3.3V 3.3V 0V 0V 0V
8 TPS22985 3.3V 3.3V 0V 3.3V 0V
9 TPS22985 3.3V 12-18V 3.3V 0V 0V
10 TPS22985 3.3V 12-18V 3.3V 3.3V 0V
11 TPS22985 3.3V 3.3V 12-18V 0V 0V
12 TPS22985 3.3V 3.3V 12-18V 3.3V 0V
1.3 Switch and Jumper Settings
Ensure jumper is installed in JP1,1-2, J1,1-2
The following is the default setup for the switches in the EVM (Pin Number from schematics):
Table 3. Switch Default Configuration
Switch Signal Name Default Switch Position
SW1 ENB Pin 4
SW2 RXH Pin 4
SW3 CFG/OE Pin 2
SW4 TXH Pin 2
SW5 TXC Pin 4
SW6 OUTB_Load Pin 3
SW7 OUTA_Load Pin 3
SW8 OUTB Pin 1
SW9 OUTA Pin 1
2 TPS22985EVM SLVU729 – May 2012
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