Texas Instruments AMC7812EVM-PDK User Manual page 6

AMC7812EVM Hardware Setup
2.3 Theory of Operation for SDM-USB-DIG Platform
The SDM-USB-DIG platform is a general-purpose data acquisition system that is used on select TI EVMs.
The core component of the platform is the MSP430F5528, an ultra-low power 16-bit MCU. The
microcontroller receives information from the host PC and translates it into I
patterns. The connected device (in this case, the AMC7812 device) connects to the I/O interface of the
platform. During digital I/O transactions, the platform obtains information from the AMC7812 device and
sends it to the host PC for interpretation.
USB Bus
from
Computer
6
AMC7812EVM-PDK User's Guide
Figure 3
3.3-V
Regulator
+3.3 V
USB
+5.0 V
MSP430F5528
Microcontroller
Power on
Reset
USB +5.0 V
Figure 3. SDM-USB-DIG Platform Block Diagram
Copyright © 2010–2014, Texas Instruments Incorporated
shows a block diagram of the platform.
SDM-USB-DIG
Level
Translators
Power
Switching
+3.3 V
SBAU177D – September 2010 – Revised August 2014
www.ti.com
2
C, SPI, or other digital I/O
I2C
SPI
GPIO
Vdut
(Hi-Z, 3.3 V or 5 V) Switched Power
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