Texas Instruments PGA112, Руководство пользователя

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2.4 Theory of Operation For USB_DAQ_Platform
TUSB3210
8052 C
with USB Interface
and UART
m
USB Bus
From Computer
3.3V
Regulator
Adjustable
Regulator
V
(2.7V to 5.5V)
CC
V
m
C
3.3V
S
V_USB
5V
8Kx8 Byte
EEPROM
Buffers and
Latches
Power
Switching
V
(2.7V to 5.5V)
DUT
Switched Power
I C, SPI
Control Bits, and
Measure Bits
2
External
Power
Reset Button
and
Power-On Reset
USB DAQ
Platform
3 PGA112EVM Hardware Setup
3.1 Electrostatic Discharge Warning
www.ti.com
PGA112EVM Hardware Setup
Figure 5 shows the block diagram for the USB DAQ 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 (available for download at www.ti.com). The block
diagram shown in Figure 5 gives a brief overview of the platform. The primary control device on the USB
DAQ Platform is the TUSB3210 .
Figure 5. USB_DAQ_Platform Block Diagram
The PGA112EVM 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.
Many of the components on the PGA112EVM 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.
CAUTION
Failure to observe ESD handling procedures may result in damage to EVM
components.
SBOU073 – February 2009 PGA112 Evaluation Module 9
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