Sm-Usb-Dig Platform Block Diagram - Texas Instruments INA223EVM User's Manual And Software Tutorial

INA223EVM Hardware Setup
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
given as a brief overview of the SM-USB-DIG Platform.
USB Bus
from
Computer
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,
2
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.
6
INA223EVM User's Guide and Software Tutorial
3.3-V
Regulator
USB
+5.0 V +3.3 V
TUSB3210
8052 Microcontroller
w/USB Interface
and UART
Power-On
8K 8 Byte
´
Reset
EEPROM
USB +5.0 V
+3.3 V
Figure 4. SM-USB-DIG Platform Block Diagram
Copyright © 2012, Texas Instruments Incorporated
SM-USB-DIG
Buffer and
Level
Translators
VDUT
(Hi-Z, 3.3 V, or 5 V)
Power
Switching
www.ti.com
Figure 4 is
2
I C
SPI
Control Bits
Measure Bits
Switched Power
SBOU125 – June 2012
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