Sm-Usb-Dig Platform Block Diagram - Texas Instruments INA230EVM User Manual

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2.2 Signal Definitions of H1 (10-Pin Male Connector Socket)
Table 3 lists the pinout for the 10-pin connector socket used to communicate between the INA230EVM
and the SM-USB-DIG. It should be noted that the INA230EVM only uses the necessary I
communication lines (pins 1 and 3) and the V
the INA230 chip.
Pin on J1
1
2
3
4
5
6
7
8
9
10
(1)
When V
DUT
2.2.1 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,
block diagram shown in
SM-USB-DIG Platform is the TUSB3210. The TUSB3210 is an 8052 microcontroller that has an onboard
USB interface. The microcontroller receives information from the host computer that it interprets into
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power, 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.
To Computer USB Bus
and Power Supplies from Computer
SBOU124 – March 2012
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Table 3. Signal Definition of J1 on INA230EVM Board
Signal
I2C_SCL
CTRL/MEAS4
I2C_SDA1
CTRL/MEAS5
SPI_DOUT1
V
SPI_CLK
GND
SPI_CS1
SPI_DIN1
is Hi-Z, all digital I/O are Hi-Z as well.
Figure 4 gives a brief overview of the platform. The primary control device on the
3.3-V
Regulator
+3.3 V
USB
+5.0 V
TUSB32108052
Microcontroller
with USB Interface
and UART
Power-On
8-K
Reset
EEPROM
USB +5.0 V
Figure 4. SM-USB-DIG Platform Block Diagram
Copyright © 2012, Texas Instruments Incorporated
and GND pins (pin 6 and pin 8) to issue commands to
DUT
2
I C Clock Signal (SCL)
GPIO: Control Output or Measure
2
I C Data Signal (SDA)
GPIO: Control Output or Measure
SPI Data Output (MOSI)
Switchable DUT Power Supply: +3.3
DUT
V, +5 V, Hi-Z (Disconnected)
SPI Clock Signal (SCLK)
Power Return (GND)
SPI Chip Select Signal (CS)
SPI Data Input (MISO)
SBOU098 (available for download at www.ti.com). The
SM-USB-DIG
Buffers and
Level
Translators
8-Byte
´
(Hi-Z, 3.3V or 5V)
Power
Switching
+3.3 V
INA230EVM Evaluation Board and Software Tutorial
INA230EVM Hardware Setup
2
C
Description
Input
Input
(1)
2
I C
SPI
Control Bits
Measure Bits
Vdut
Switched Power
To Test Board
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