Texas Instruments INA223EVM User's Manual And Software Tutorial page 10

INA223EVM Hardware Overview
3.6 INA223EVM Hardware
This section describes some of the hardware features present on the INA223EVM board.
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3.6.1 JMP3: I C versus Control Setting
The JMP3 setting determines if the INA223 is powered from the SM-USB-DIG platform or an external
power supply. If JMP3 is set to the INT position, the V
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.
When JMP3 is set to the EXT position, an external supply connected to terminal T1 must be used to
provide the digital supply voltage for the INA223.
3.6.2 JMP1 and JMP2: I
JMP1 and JMP2 are used to set the hardware setting for the A0 I
JMP2, the A0 address can be set to either a logic '1' or a logic '0'. Using JMP1, the A0 address can be set
to either the SCL or SDA communication line. Make sure to only have a jumper installed on JMP1 or
JMP2. Failure to keep these lines separate can lead to board shorts and problems with the I
communication lines. See the
software to match the JMP1 and JMP2 hardware settings.
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3.6.3 External I C lines and Terminal Block T3
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The I C communication lines on the INA223EVM are tied to two sources: The internal I
lines from the SM-USB-DIG Platform and terminal block T3. If external signals separate from the SM-USB-
DIG are to be used, simply disconnect the SM-USB-DIG from the INA223 board and connect to external
SDA, SCL, and GND lines. Also, remember to apply an external V
communication device being used.
Failure to disconnect the SM-USB-DIG Platform while using external I
communication can cause damage to the SM-USB-DIG or external
communication device.
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INA223EVM User's Guide and Software Tutorial
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C Address Hardware Setting (A0)
I2C Address Selection
Copyright © 2012, Texas Instruments Incorporated
pin is connected to the switchable VDUT signal
S
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C address pin on the INA223. Using
section for how to configure the INA223EVM
that is compatible with the I
S
CAUTION
www.ti.com
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C
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C communication
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C
2
C
SBOU125 – June 2012
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