Datasheet

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
To Computer and Power Supplies
To Test Board
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
2
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 SBOU125–June 2012
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