INA230EVM Hardware
3.6
INA230EVM Features
This section describes some of the hardware features present on the INA230EVM test board.
3.6.1
J2: I
2
C V
S
Control Setting
Jumper J2 selects what the INA230 supply pin is connected to. If J2 is set to the INT position, the V
S
pin is
connected to the switchable V
DUT
signal generated from the SM-USB-DIG Platform. This voltage can be
set to either 3.3 V or 5 V, depending on how it is configured in the software. While J4 is set in the INT
position, the V
S
Power button in the INA230EVM software is able to control whether the V
DUT
supply
voltage is turned on or off.
When J2 is set in the EXT position, an external supply connected to terminal T2 can be used to provide
the supply voltage for the INA230.
3.6.2
J3 and J4: I
2
C Address Hardware Setting (A0)
Jumpers J3 and J4 are used to set the hardware setting for the A0 I
2
C address pin on the INA230. Using
J3, the A0 address can be set to either a logic '1' or a logic '0'. Using J4, the A0 address can be set to
either the SCL or SDA communication line. Make sure to only have either J3 or J4 connected individually;
failure to keep these lines separate can lead to board shorts and problems with the I
2
C communication
lines. See
on how to configure the INA230EVM software to match the J3/J4 hardware
setting.
3.6.3
J5 and J6: I
2
C Address Hardware Setting (A1)
Jumpers J5 and J6 are used to set the hardware setting for the A1 I
2
C address pin on the INA230. Using
J3, the A1 address can be set to either a logic '1' or a logic '0'. Using J4, the A1 address can be set to
either the SCL or SDA communication line. Make sure to only have either J5 or J6 connected individually;
failure to keep these lines separate can lead to board shorts and problems with the I
2
C communication
lines. See
on how to configure the INA230EVM software to match the J5/J6 hardware
setting.
3.6.4
External I
2
C Lines and Terminal Block T1
The I
2
C communication lines on the INA230EVM are tied to two sources: the internal I
2
C communication
lines from the SM-USB-DIG and the terminal block T1. If the user wants to add external signals separate
from the SM-USB-DIG, simply disconnect the SM-USB-DIG from the INA230EVM board and hook up the
necessary SDA, SCL, and GND lines. Also, remember to apply an external supply to the lines that is
compatible with the I
2
C communication device being used.
NOTE:
Failure to disconnect the SM-USB-DIG while using external I
2
C communication can cause
damage to the SM-USB-DIG or any external communication devices that are connected.
10
INA230EVM Evaluation Board and Software Tutorial
SBOU124 – March 2012
Copyright © 2012, Texas Instruments Incorporated
