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2.3
Theory of Operation For USB_DIG_Platform
Figure 5
shows the block diagram for the 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
diagram shown in
Figure 5
DIG Platform is the TUSB3210.
External
Power
USB Connection
from Computer
3
INA220EVM Hardware Setup
The INA220EVM hardware setup involves connecting the two PCBs of the EVM together, applying power,
connecting the USB cable, and setting the jumpers. This section presents the details of this procedure.
3.1
Electrostatic Discharge Warning
Many of the components on the INA220EVM 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.
Failure to observe ESD handling procedures may result in damage to EVM
components.
SBOU079A – July 2009 – Revised February 2010
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a separate document
gives a brief overview of the platform. The primary control device on the USB
V
(2.7V to
5.5V)
Adjustable
Regulator
3.3V
Regulator
V
mC
S
V
USB
3.3V
5V
TUSB3210
8052 C
m
with USB Interface
and UART
8Kx8-Byte
Reset Button
EEPROM
and Power-On
Reset
Figure 5. USB_DIG_Platform Theory of Operation
Copyright © 2009–2010, Texas Instruments Incorporated
(available for download at www.ti.com). The block
CC
V
DUT
(2.7V to 5.5V)
Power
Switching
USB DIG EVM
Buffers and
Latches
CAUTION
INA220EVM Hardware Setup
Switched Power
2
I C
SPI
Control Bits
Measure Bits
INA220 Evaluation Module
7
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