Texas Instruments TMP1075EVM User manual

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TMP1075EVM User's Guide
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User's Guide
SNOU157A–March 2018–Revised April 2018
TMP1075EVM User's Guide
The industry standard LM75/TMP75 is now available with high accuracy and a wider temperature range.
The TMP1075 is a drop-in replacement for the most prevalent digital temperature sensors with enhanced
features. The TMP1075 provides up to ±0.5°C typical accuracy over the −25°C to +85°C range, and ±1°C
typical accuracy over the −55°C to +125°C range with 12-bit resolution, giving a temperature resolution of
0.0625°C. The Texas Instruments TMP1075EVM (Evaluation Module) provides the user a simple way to
get started with TMP1075. The module and GUI are designed to provide the user a quick setup to
evaluate the system and register map. The EVM features a perforation that allows the temperature sensor
to be placed away from the MSP430 for remote temperature measurements and a header to connect
multiple TMP1075’s to the controller. This document provides detailed information about the hardware
design and software installation.

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Contents
1 Overview...................................................................................................................... 3
2 EVM Kit Contents............................................................................................................ 3
3 Board Connectors and Components...................................................................................... 4
4 System Setup ................................................................................................................ 6
5 Software Installation......................................................................................................... 7
6 Upgrading the Firmware................................................................................................... 12
7 TMP1075EVM Setup and Operation .................................................................................... 16
8 Board Layout................................................................................................................ 22
9 Schematic ................................................................................................................... 24
10 Bill of Materials ............................................................................................................. 25
List of Figures
1 TMP1075 Evaluation Board Top Side .................................................................................... 4
2 TMP1075 Evaluation Board Bottom Side................................................................................. 4
3 TMP1075EVM Hardware Setup ........................................................................................... 6
4 TMP1075EVM Welcome.................................................................................................... 7
5 TMP1075EVM License Agreement........................................................................................ 8
6 NI License Agreements..................................................................................................... 8
7 TMP1075EVM Installation Directory ...................................................................................... 9
8 Network Proxy Server....................................................................................................... 9
9 TMP1075EVM Select Components Installation........................................................................ 10
10 Ready to Install............................................................................................................. 11
11 TMP1075EVM Installation Finish ........................................................................................ 11
12 TMP1075 GUI Firmware Upgrade ....................................................................................... 12
13 Firmware Update Confirmation........................................................................................... 13
14 TMP1075EVM Connection Diagram..................................................................................... 13
15 MSP430 USB Firmware Upgrade Program............................................................................. 14
16 MSP430 USB Firmware Upgrade Program With No Device Connected ........................................... 14
17 MSP430 USB Firmware Upgrade Program With Device Found..................................................... 15
18 MSP430 USB Firmware Upgrade Program Showing Successful Firmware Update.............................. 15
19 Confirmation of USB-to-I2C Converter Driver Installation ............................................................ 16
20 Default Configuration ...................................................................................................... 16
21 TMP1075EVM Default Tab ............................................................................................... 17
22 Registers Tab............................................................................................................... 19
23 Configuration Tab .......................................................................................................... 20
24 TMP1075 Set-Up........................................................................................................... 21
25 Top Assembly Layer....................................................................................................... 22
26 Top Layer Routing ......................................................................................................... 22
27 Power Layer Routing ...................................................................................................... 22
28 Ground Layer Routing..................................................................................................... 23
29 Bottom Layer Routing ..................................................................................................... 23
30 Bottom Assembly Layer................................................................................................... 23
31 TMP1075EVM Schematic................................................................................................. 24
List of Tables
1 EVM Kit Contents............................................................................................................ 3
2 Device and Package Configurations ...................................................................................... 4
3 I2C Slave Addresses........................................................................................................ 6
4 TMP1075EVM Bill of Materials........................................................................................... 25

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1 Overview
The TMP1075EVM allows users to evaluate the performance of the best digital temperature sensor
available in the VSSOP8 (MSOP8) package. The EVM comes in a USB stick form factor with an onboard
MSP430F5528 microcontroller that interfaces with both the host computer and up to two TMP1075
devices using I2C interface. The module is designed to provide user flexibility separating the TMP1075
and MSP430 at the perforation location on the EVM board. The perforation allows the user to connect
wires, cable, or header to both ends for remote temperature measurements or connects to desired system
as well as connecting additional TMP1075s.
2 EVM Kit Contents
Table 1 details the contents of the EVM kit. Contact the Texas Instruments Product Information Center
nearest you if any component is missing. TI highly recommends checking the TI website at
http://www.ti.com to verify that you have the latest versions of the related software.
Table 1. EVM Kit Contents
ITEM QUANTITY
PCB test board: TMP1075EVM 1
USB cable extender 1

USB Connector (J2) Breakouts TMP1075 (U4)
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3 Board Connectors and Components
The jumpers and connectors on the EVM, along with how to properly connect, set up, and use the
TMP1075 Bench Board, are described here.
3.1 Input/Output Connector Description and Components
Figure 1. TMP1075 Evaluation Board Top Side
Figure 2. TMP1075 Evaluation Board Bottom Side
Table 2. Device and Package Configurations
DEVICE IC PACKAGE
U4 TMP1075AIDRVR VSSOP (8)

OUT
ADJ REF
V
R 51.1k 1
V
ª º
§ ·
: u 
« »
¨ ¸
« »
© ¹
¬ ¼
ADJ
OUT REF REF R
V V V 51.1k
ª º
§ ·
 u
« »
¨ ¸
:
© ¹
¬ ¼
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3.2 EVM Power Supply Input – J1
TMP1075EVM uses the +5-V input power supply of the USB connector to power the EVM. The EVM does
not require an external power supply. The board is powered by the USB port and switches to +3.3 V. It
can be powered by shorting the J1 jumper with a regulated voltage with desired programmable voltage
such as 1.8 V, 3.3 V, and 3.6 V based on Equation 1. The EVM power supply input can be changed to
any input power supply range of the TMP1075 1.7 V to 5.5 V; however, note that the MSP430 can only
support a power supply range of 1.8 V to 3.6 V with the recommended VOH and VOL conditions listed in the
TMP1075 data sheet specifications.
The resistor adjust RADJ can be calculated using Equation 1 with the desired voltage of VOUT and where
VREF = 1.23 V, RADJ = R6, and R8 = 51.1kΩ.
(1)
(2)
3.3 Interface Connector – J2
J2 is the USB connector, and used to connect the PC. The interface is used to access the device’s
registers and read the conversion data from the TMP1075 through I2C communication protocol.
3.4 Debug Jumper – J4
J4 is the connector that allows debugging the firmware using three wires instead of the standard 14-pin
header. This connector is not populated.
3.5 Pushbutton Switch – SW1
Basically, the SW1 is to bring the MSP430 into a BSL mode for upgrading the firmware with combination
of the USB connector manually referring to the picture in Figure 1 BSL button (SW1 switch). Press and
hold the switch SW1 next to the USB connector while plugging the USB cable from the board to the PC.
This will allow bringing the MSP430 into BSL mode.
3.6 Header Connector – J3
The purpose of the header connector is to isolate the heat source and prevent it from heat incoming
directly into contact with the TMP1075, and the perforation allows users to snap at the breakout tab. When
the TMP1075 is separated from the MSP430, it can be connected through wires or header to both ends
for remote temperature measurements.
3.7 LED – (D4, D6, D7)
There are a total of three LEDs on the board: green (D4), red (D6), and orange (D7). The green LED is
the power supply indicator, and it should be turned ON. The orange LED should not blink when the EVM
is initially plugged into the PC. The orange LED will blink if the power-on-reset (POR) tests on the
MSP430 microcontroller fails on start-up or if the Test LED button is toggled. It will blink when the Start
Graph button is pressed. The red LED is the Alert pin indicator when the Alert pin is pulling LOW.

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3.8 I2C Slave Addresses – (R15, R16)
TMP1075 is capable of supporting up to 32 I2C 7-bit addresses. The TMP1075 is connected to the bus by
a unique slave address to operate data transfer from the master-transmitter to the slave-receiver or the
slave-transmitter to the master-receiver. The TMP1075 can be configured desired two serial bus
addresses depending on the state of the A0, A1, and A2 as Table 3. The EVM can be configured up to
two addresses. At default, the resistor R16 is soldered, and configured for 0x48h address. For more
details information, refer to the Address Pins and Slave Addresses for the TMP1075 table in the TMP1075
Temp Sensor With I2C and SMBus Interface in Industry Standard LM75 data sheet (SBOS854).
Table 3. I2C Slave Addresses
CORRESPONDING EVM
RESISTOR ADDRESS PIN CONNECTION SLAVE ADDRESS
A2 A1 A0 BINARY HEX
R15 GND GND GND 1001000 0x48
R16 GND GND V+ 1001001 0x49
4 System Setup
The TMP1075EVM hardware consists of the USB2ANY Platform and the TMP1075EVM altogether in one
single board. The unit is easily connected through USB connector into the computer as shown in Figure 3.
Figure 3. TMP1075EVM Hardware Setup

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5 Software Installation
5.1 Graphical User Interface (GUI)
The EVM software is tested on the Microsoft Windows 7 and 10 operating system (OS). The software also
functions on other Windows operating systems. The EVM software is available through the EVM product
folder on the TI website. To download the software to your system, simply follows the instructions below.
1. Go to the TMP1075EVM web page on the TI website: http://www.ti.com/tool/TMP1075EVM. Scroll
down to the Software section and download the latest evaluation software.
2. Unzip the downloaded file into a known directory. Once the files are extracted, navigate and run the
Setup_TMP1075EVM_GUI.exe file located in [Unzip location]. The EVM software installer then begins
the installation process as shown in Figure 4.
Figure 4. TMP1075EVM Welcome

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3. Follow the on-screen instructions by clicking the Next button to install the software. The following this
option, two license agreements are presented as shown in Figure 5 and Figure 6 that must be
accepted. After accepting both the Texas Instruments and National Instruments license agreements,
the user is given the choice of selecting the directory to install the program; usually, TI recommends
choosing the default setting stored in the C:\Program Files (x86)\Texas Instruments\TMP1075EVM
path as shown in Figure 7.
Figure 5. TMP1075EVM License Agreement
Figure 6. NI License Agreements

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Figure 7. TMP1075EVM Installation Directory
4. Some servers must configure the proxy before authorizing users gains access outside of the internal
network, and they act like an intermediary between the user's computer and the internet. In this case,
provide the correct server address and port number. If the server does not require the proxy server,
just simply delete the default address and port number in Figure 8 by leaving the input box blank and
click Next.
Figure 8. Network Proxy Server

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5. For first-time installation, ensure the LabVIEW Run Time Engine is listed in the following summary as
shown in Figure 9. TMP1075EVM GUI is required LabVIEW 2016 f5 runtime engine for proper
operation. Once the Next button is clicked, the progress bar opens and shows the installation of the
software. It may take some time to download the LabVIEW Run Time Engine on the first installation.
Users may be prompted to download the file when installing the software for the first time, especially if
the LabVIEW Run Time Engine checkbox is checked.
Figure 9. TMP1075EVM Select Components Installation

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6. Click the Next button in Figure 10 to proceed the installation processes.
Figure 10. Ready to Install
7. Once the installation process is complete, uncheck the View readme file and click Finish.
Figure 11. TMP1075EVM Installation Finish

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6 Upgrading the Firmware
There are two ways to upgrade or program the firmware of the TMP1075EVM board. The first method is
to click on the Upgrade Firmware through the TMP1075 GUI or go directly to the directory of the
TMP1075EVM folder.
CAUTION
TMP1075EVM software must be installed before performing any tasks.
In Figure 12, the Upgrade Firmware button will call the MSP430 USB Firmware Upgrade Example
application in the TMP1075EVM folder C:\Program Files (x86)\Texas Instruments\TMP1075EVM\MSP430
USB Firmware Upgrade\BSL_USB_GUI.exe. So, another method is to go directly to the folder instead of
running from the GUI. For programming multiple EVMs, the second method is the best option.
• An error window will appear if the computer cannot communicate with the EVM. This is due to the
driver not recognized by the computer yet because the firmware is not programmed. On top right of the
GUI, ensure the Demo Mode checkbox is checked.
• Click on Update Firmware button. This will launch the MSP430 USB Firmware Upgrade Example
program.
• The confirmation pop-up dialog appears in Figure 13. Click on OK button to precede the firmware
update.
Figure 12. TMP1075 GUI Firmware Upgrade

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Figure 13. Firmware Update Confirmation
Figure 14. TMP1075EVM Connection Diagram
To update the firmware of the TMP1075EVM, please following the procedure below.
1. Start the MSP430 USB Firmware Upgrade Example program as shown in Figure 15 , and click on Next
to proceed the update and accept the license agreement. Note that in Figure 16, it shows No device
connected at this time.
2. Before starting the upgrade, the BSL mode must be invoked by disconnecting the TMP1075EVM from
the USB cable.
3. Press and hold the SW1 switch button down while connecting the USB cable.
4. Once the BSL mode is now invoked, the MSP430 USB Firmware Upgrade Example shows Found 1
device in Figure 17.
5. Select the Select Firmware radio button and click on Browse button to navigate the firmware file in this
folder C:\Program Files (x86)\Texas Instruments\TMP1075EVM\Firmware. The firmware file name is
USB2ANY_F5528.txt version v2.7.16.
6. The firmware image is programmed, and the TMP1075EVM restarts automatically. The new firmware
is now ready to use as shown in Figure 18.

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Figure 15. MSP430 USB Firmware Upgrade Program
Figure 16. MSP430 USB Firmware Upgrade Program With No Device Connected

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Figure 17. MSP430 USB Firmware Upgrade Program With Device Found
Figure 18. MSP430 USB Firmware Upgrade Program Showing Successful Firmware Update

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7 TMP1075EVM Setup and Operation
CAUTION
Do not exceed the power supply rating of the MSP430.
7.1 Launching and Running the Software
The TMP1075EVM is recognized by the host as a generic human interface device (HID); therefore, there
is no required proprietary driver to install on the user's PC. It shows the typical response to connecting the
USB-to-I2C converter board to a PC USB port for the first time. Typically, the computer responds with a
Found New Hardware: USB device pop-up dialog. The pop-up window then typically changes to Found
New Hardware: USB Human Interface Device. This pop-up indicates that the device is ready to be used.
The USB-to-I2C Converter uses the human interface device drivers that are part of the Microsoft
Windows® operating system.
Figure 19. Confirmation of USB-to-I2C Converter Driver Installation
The TMP1075EVM GUI can be run from the Start Menu or from Windows desktop. It is located in a folder
Start -> Programs -> Texas Instruments -> TMP1075EVM -> TMP1075EVM.exe. Clicking the OK button
will take the user to the main window of the GUI.
Figure 20. Default Configuration
1. Connect the TMP1075EVM to a USB port on a PC as shown in Figure 20.
2. Launch the TMP1075EVM software by clicking on Start >> All Program >> Texas Instruments >>
TMP1075 EVM >> TMP1075EVM.exe. The TMP1075 EVM GUI should automatically initialize and
connect to the HID port. A successful connection will show HARDWARE CONNECTED highlighted in
green color on the bottom of the GUI status indicator. If there is a connection problem please verify if
the TMP1075EVM has an established connection with the PC. A fail connection if the status indicator
shows as DEMO MODE.

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7.2 Tab Pages Selection
The tab pages selection consists of three tabs: Main (Temperature Graph), EVM Set-Up, and TMP1075
Configuration. Launching the software will take you to the main window GUI (Main tab) display. By clicking
on the page tab allows switching between pages of the tab control.
Figure 21. TMP1075EVM Default Tab

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7.3 Main Tab
The Main tab provides graphing the temperature result as well as other features:
Clear Chart erases the contents of the Temperature Chart box or click right button of the mouse on the
display screen then select Clear chart.
Save Chart prompts for a file name, and then saves the contents of the current Temperature graph box to
*.csv file. Note that theClear Chart button must be performed first before log the data; otherwise, it will
also save from the previous data in the memory.
Current Value shows the current temperature of the TMP1075.
Celsius or Fahrenheit is to toggle the temperature conversion Celsius to Fahrenheit.
One Shot is available on the Temperature Chart tab. The One Shot button writes to the TMP1075
configuration register with the one-shot in conversion mode. This setting initiates a temperature
conversion within the TMP1075 device that updates the temperature result registers. After the one-shot
conversion finishes, the device goes into shutdown until the next trigger of one-shot again.
Continuous performs the temperature conversion continuously when the shutdown mode bits is
configured in the configuration register to continuously. Each temperature conversion consists of an active
conversion period followed by a standby period based on the time of the conversion cycle configuration.
Alert high and low limit register can be set by entering the value in °C or °F based on °C/°F control on
Main tab that stores the high and low limit for comparison with the temperature result.

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7.4 Register Tab
The Registers tab provides access to the registers of the TMP1075, performing read and writes
commands. Changes to the configuration page are mirrored here, and vice versa. For more details about
each register, refer to the latest TMP1075 (SBOS854) data sheet.
Figure 22. Registers Tab

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7.5 Configuration Tab
Figure 23. Configuration Tab
Configuration register can be set to desired value by selecting the drop-down menu.
Alert high and low limit register can be set by entering the value in °C/°F based on setting of the Main
tab.
Temperature displays the current temperature of the TMP1075.