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TUSB3210

8052 Microcontroller

with USB Interface

and UART

USB Bus

from Computer

3.3-V

Regulator

+3.3 V

USB

+5.0 V

8-K 8-Byte

EEPROM

Buffers and

Level

Translators

Power

Switching

Vdut

(Hi-Z, 3.3V or 5V)

Switched Power

I C

SPI

Control Bits

Measure Bits

Power-On

Reset

SM-USB-DIG

To Test Board

To Computer

and Power Supplies

+3.3 V

USB +5.0 V

INA3221EVM Hardware Overview

www.ti.com

2.2.1 SM-USB-DIG Platform Theory of Operation

Figure 4 shows a block diagram for the SM-USB-DIG platform. This platform is a general-purpose data

acquisition system that is used on several different Texas Instruments' evaluation modules. The details of

its operation are included in a separate document. The block diagram shown in Figure 4 is given as a brief

overview of the platform.

The primary control device of the SM-USB-DIG platform is the TUSB3210. The TUSB3210 is an 8052

microcontroller that has a built-in USB interface. The microcontroller receives information from the host

computer that it interprets into power, I

C, SPI, and other digital I/O patterns. During the digital I/O

transaction, the microcontroller reads the response of any device connected to the I/O interface. The

response from the device is sent back to the PC where it is interpreted by the host computer.

Figure 4. SM-USB-DIG Platform Block Diagram

3 INA3221EVM Hardware Overview

Setting up the INA3221EVM hardware involves connecting the two EVM PCBs together, applying power,

connecting the USB cable, and setting the jumpers. This section presents the details of this procedure.

3.1 Electrostatic Discharge Warning

CAUTION

Many of the components on the INA3221EVM are susceptible to damage by

electrostatic discharge (ESD). Customers are advised to observe proper ESD

handling precautions when unpacking and handling the EVM, including the use

of a grounded wrist strap at an approved ESD workstation.

3.2 Connecting the Hardware

To connect the INA3221EVM and SM-USB-DIG platform together, gently slide the male and female ends

of the 10-pin connectors together. Make sure that the two connectors are completely pushed together;

loose connections may cause intermittent operation.

INA3221EVM Evaluation Board and Software Tutorial SBOU126–April 2012

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