Texas Instruments TMP112EVM User Manual
User's Guide
SBOU144–August 2014
TMP112EVM Evaluation Board and Software Tutorial
This user's guide describes the characteristics, operation, and use of the TMP112EVM evaluation board.
This guide discusses how to set up and configure the software and hardware and reviews various aspects
of the program operation. Throughout this document, the terms evaluation board, evaluation module, and
EVM are synonymous with the TMP112EVM. This user's guide also includes information regarding
operating procedures and input/output connections, an electrical schematic, printed circuit board (PCB)
layout drawings, and a parts list for the EVM.
Contents
1 Overview ..................................................................................................................... 2
2 TMP112EVM Hardware Setup............................................................................................. 4
3 TMP112EVM Hardware..................................................................................................... 6
4 TMP112EVM Software...................................................................................................... 9
5 TMP112EVM Software Overview ........................................................................................ 11
6 TMP112 Documentation................................................................................................... 18
List of Figures
1 Hardware Included with TMP112EVM Kit ................................................................................ 3
2 TMP112EVM Hardware Setup............................................................................................. 4
3 TMP112EVM Board Block Diagram....................................................................................... 5
4 SM-USB-DIG Platform Block Diagram.................................................................................... 6
5 Connecting SM-USB-DIG Platform........................................................................................ 7
6 Confirmation of SM-USB-DIG Platform Driver Installation ............................................................. 7
7 10-Pin Ribbon Cable Extender............................................................................................. 8
8 TMP112EVM Software Installation........................................................................................ 9
9 TMP112EVM License Agreements ...................................................................................... 10
10 TMP112EVM Software Interface......................................................................................... 11
11 TMP112EVM Software: Communication Error with the SM-USB-DIG Platform ................................... 11
12 TMP112 Reading from Registers ........................................................................................ 12
13 TMP112 Writing to Registers ............................................................................................. 13
14 Reading the Temperature Gauge........................................................................................ 14
15 Configuring the Polarity.................................................................................................... 14
16 Active and Shutdown Mode............................................................................................... 15
17 Extended and Normal Mode.............................................................................................. 15
18 Comparator and Interrupt Mode.......................................................................................... 15
19 Conversion Rate............................................................................................................ 16
20 Setting the Fault Queue ................................................................................................... 16
21 Setting the Path for the Log File ......................................................................................... 16
22 Alert Config Box ............................................................................................................ 17
23 Register Tab ................................................................................................................ 17
24 TMP112EVM Board Schematic .......................................................................................... 18
25 TMP112EVM PCB Top Layer (Component Side)...................................................................... 19
26 TMP112EVM PCB Bottom Layer ........................................................................................ 19
SBOU144–August 2014 TMP112EVM Evaluation Board and Software Tutorial
Submit Documentation Feedback
Copyright © 2014, Texas Instruments Incorporated
1
Overview
1 TMP112EVM Kit Contents.................................................................................................. 2
2 Related Documentation..................................................................................................... 4
3 Signal Definition of H1 on the TMP112EVM Board ..................................................................... 5
4 Bill of Materials ............................................................................................................. 20
1 Overview
The TMP112 is a digital output temperature sensor capable of reading temperatures to 12 bits of
resolution. The TMP112 uses a two-wire, I2C™ and SMBus™ interface that allows up to four devices on
one bus. The TMP112 is ideal for extended temperature measurement, and is also specified to operate
between –40°C and 125°C. The TMP112EVM is a platform for evaluating the performance of the TMP112
under various signal, reference, and supply conditions.
This document gives a general overview of the TMP112EVM and provides a general description of the
features and functions to be considered while using this evaluation module.
1.1 TMP112EVM Kit Contents
Table 1 summarizes the contents of the TMP112EVM kit. Figure 1 illustrates all of the included hardware.
Contact the Texas Instruments Product Information Center nearest you if any component is missing. TI
highly recommends that you also check the TMP112 product folder on the TI web site at www.ti.com to
verify that you have the latest versions of the related software.
www.ti.com
List of Tables
Table 1. TMP112EVM Kit Contents
Item Quantity
TMP112EVM PCB test board 1
SM-USB-DIG platform PCB 1
USB extender cable 1
10-pin connector ribbon cable 1
SMBus is a trademark of Intel Corporation.
Microsoft, Windows are registered trademarks of Microsoft Corporation.
I2C is a trademark of NXP Semiconductors.
WinZIP is a registered trademark of WinZip International LLC.
All other trademarks are the property of their respective owners.
2
TMP112EVM Evaluation Board and Software Tutorial SBOU144–August 2014
Copyright © 2014, Texas Instruments Incorporated
Submit Documentation Feedback
www.ti.com
Overview
Figure 1. Hardware Included with TMP112EVM Kit
SBOU144–August 2014 TMP112EVM Evaluation Board and Software Tutorial
Submit Documentation Feedback
Copyright © 2014, Texas Instruments Incorporated
3
Overview
1.2 Related Documentation from Texas Instruments
The following documents provide information regarding Texas Instruments' integrated circuits used in the
assembly of the TMP112EVM. This user's guide is available from the TI web site under literature number
SBOU114. Any letter appended to the literature number corresponds to the document revision that is
current at the time of the writing of this document. Newer revisions may be available from www.ti.com, or
call the Texas Instruments' Literature Response Center at (800) 477-8924 or the Product Information
Center at (972) 644-5580. When ordering, identify the document by both title and literature number.
Table 2. Related Documentation
Document Literature Number
TMP112 product data sheet SBOS397
SM-USB-DIG platform user guide SBOU098
2 TMP112EVM Hardware Setup
Figure 2 shows the overall system setup for the TMP112EVM. The computer runs software that
communicates with the SM-USB-DIG platform. The SM-USB-DIG platform generates the digital signals
used to communicate with the TMP112 test board. The SM-USB-DIG and TMP112EVM are easily
connectable through a 10-pin, board-to-board connector attached to the SM-USB-DIG platform and the
TMP112EVM PCBs. When these two boards are connected, simply plug the USB device from the SMUSB-DIG into the computer, as shown in Figure 2.
www.ti.com
Figure 2. TMP112EVM Hardware Setup
4
TMP112EVM Evaluation Board and Software Tutorial SBOU144–August 2014
Copyright © 2014, Texas Instruments Incorporated
Submit Documentation Feedback
www.ti.com
2.1 Theory of Operation for TMP112 Hardware
The TMP112EVM only requires the two-wire I2C lines (SDA and SCLK) and V
constant 3.3 V and power return, as shown in Figure 3. The TMP112EVM also has test points to monitor
these signal lines and ground, in case users may want to use their own signals or verify successful I2C
communications.
Figure 3. TMP112EVM Board Block Diagram
2.2 Signal Definitions of H1 (10-Pin Male Connector Socket)
Table 3 shows the pin out for the 10-pin connector socket used to communicate between the
TMP112EVM and the SM-USB-DIG. Note that the TMP112EVM uses only the necessary I2C
communication lines (pins 1 and 3) and the V
to the TMP112 sensors.
and GND (pins 6 and 8, respectively) to issue commands
DUT
TMP112EVM Hardware Setup
/GND to supply a
DUT
(1)
Table 3. Signal Definition of H1 on the TMP112EVM Board
Pin on U1 Signal Description
1 I2C_SCL I2C clock signal (SCL)
When V
2 CTRL/MEAS4 GPIO: control output or measure
3 I2C_SDA1 I2C data signal (SDA)
4 CTRL/MEAS5 GPIO: control output or measure
5 SPI_DOUT1 SPI data output (MOSI)
6 V
7 SPI_CLK SPI clock signal (SCLK)
8 GND Power Return (GND)
9 SPI_CS1 SPI chip-select signal (CS)
10 SPI_DIN1 SPI data input (MISO)
is Hi-Z, all digital I/O are Hi-Z as well.
DUT
DUT
input
input
Switchable DUT power supply: 3.3 V,
5 V, Hi-Z (disconnected)
(1)
SBOU144–August 2014 TMP112EVM Evaluation Board and Software Tutorial
Submit Documentation Feedback
Copyright © 2014, Texas Instruments Incorporated
5
TUSB3210
8052 Cm
with USB Interface
and UART
8Kx8-byte
EEPROM
+3.3V
V
USB
+5V
Power-On Reset
SM USB DIG Platform
To Test Board
To Computer and Power Supplies
Power
Switching
Switched
Power
USB Bus
from
Computer
USB Power
+5.0V
+3.0V
V
(H-Z, 3.3V, or 5V)
DUT
Buffers and
Level Translators
I C/SPI
Control and
Measure Bits
2
+3.3V
Regulator
TMP112EVM Hardware
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, SBOU098 (available for download at www.ti.com). The
block diagram shown in Figure 4 gives a brief overview of the platform. The primary control device on the
SM-USB-DIG platform is the TUSB3210.
www.ti.com
Figure 4. SM-USB-DIG Platform Block Diagram
3 TMP112EVM Hardware
The TMP112EVM hardware overview involves connecting the two PCBs of the EVM together, connecting
the USB cable, applying power, and setting the jumpers. This section presents the details of this
procedure.
3.1 Electrostatic Discharge Warning
Many of the components on the TMP112EVM 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
6
Submit Documentation Feedback
Copyright © 2014, Texas Instruments Incorporated
TMP112EVM Evaluation Board and Software Tutorial SBOU144–August 2014
www.ti.com
3.2 Typical Hardware Connections
To connect the TMP112 test board and the SM-USB-DIG platform together, gently slide the male and
female ends of the 10-pin connectors together. Make sure that the two connectors are completely pushed
together; loose connections may cause intermittent operation.
3.3 Connecting the USB Cable to the DIG
Figure 5 shows the typical response to connecting the SM-USB-DIG platform board to a computer 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 changes to Found New Hardware, USB Human Interface Device. This
pop-up indicates that the device is ready to be used. The SM-USB-DIG platform uses the human interface
device drivers that are part of the Microsoft®Windows®operating system.
TMP112EVM Hardware
Figure 5. Connecting SM-USB-DIG Platform
In some cases, the Windows Add Hardware Wizard appears. If this prompt pops up, allow the system
device manager to install the human interface drivers by clicking Yes when requested to install drivers.
Windows confirms installation of the drivers with the message shown in Figure 6.
Figure 6. Confirmation of SM-USB-DIG Platform Driver Installation
SBOU144–August 2014 TMP112EVM Evaluation Board and Software Tutorial
Submit Documentation Feedback
Copyright © 2014, Texas Instruments Incorporated
7
TMP112EVM Hardware
3.4 TMP112EVM Features
This section describes some of the hardware features present on the TMP112EVM test board.
3.4.1 I2C Test Points
I2C test points are included on the TMP112 test board for user convenience. These test points can be
used to monitor the two-wire lines of the I2C interface or to run the TMP112 test board externally without
the use of the SM-USB-DIG.
3.4.2 10-Pin Connector Ribbon Extender (Optional)
The TMP112EVM kit ships with an optional ribbon cable for extending the connection between the SMUSB-DIG and the PCB. This extension cable can be useful if high temperature tests must be run on the
test board because the SM-USB-DIG is not rated for high temperatures. To connect the ribbon cable,
attach the cable to the EVM and SM-USB-DIG as shown in Figure 7.
www.ti.com
Figure 7. 10-Pin Ribbon Cable Extender
8
TMP112EVM Evaluation Board and Software Tutorial SBOU144–August 2014
Copyright © 2014, Texas Instruments Incorporated
Submit Documentation Feedback
Loading...