USB Bus

from

Computer

Power

Switching

Switched Power

I C

SPI

Control Bits

Measure Bits

2

Power-On

Reset

8K

8 Byte

EEPROM

´

Buffer and

Level

Translators

3.3-V

Regulator

+3.3 V

USB

+5.0 V

USB +5.0 V

+3.3 V

SM-USB-DIG

VDUT

(Hi-Z, 3.3 V, or 5 V)

TUSB3210

8052 Microcontroller

w/USB Interface

and UART

INA223EVM Hardware Setup

www.ti.com

2.3

Theory of Operation for SM-USB-DIG Platform

Figure 4 shows the 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 (SBOU098). The block diagram shown in Figure 4 is

given as a brief overview of the SM-USB-DIG Platform.

Figure 4. SM-USB-DIG Platform Block Diagram

The brain of the SM-USB-DIG Platform is the TUSB3210, an 8052 microcontroller that has a built-in USB

interface. The microcontroller receives information from the host computer that is interpreted into power,

I

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.

6

INA223EVM User’s Guide and Software Tutorial

SBOU125 – June 2012

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