Texas Instruments TIC12400 User manual

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TIC12400 Evaluation Module
User's Guide
SCPU036–October 2017
TIC12400 Evaluation Module
This user's guide describes the characteristics, operation, and use of the TIC12400 Evaluation Module
(EVM).
Contents
1 Introduction ................................................................................................................... 2
2 Hardware...................................................................................................................... 4
3 SWITCH BOARD Hardware Description ................................................................................. 8
4 GUI Software Installation.................................................................................................. 11
5 TIC12400 GUI Application ................................................................................................ 14
6 Board Files.................................................................................................................. 39
List of Figures
1 TIC12400 EVM Block Level Diagram..................................................................................... 2
2 TIC12400 EVM, SWITCH BOARD, and USB to USB-Mini Cable..................................................... 4
3 EVM, SWITCH BOARD, USB Cable, PC, and Power Supply Setup................................................. 4
4 EVM Hardware Top Description........................................................................................... 5
5 EVM Hardware Bottom Description ...................................................................................... 6
6 Setup_TIC12400-0.4.0_EVM.exe........................................................................................ 11
7 Installation Steps 1–6...................................................................................................... 12
8 Figure 3. Installation Steps 7–13......................................................................................... 13
9 Double Click on “App Center EVM GUI” Shortcut to Open........................................................... 14
10 GUI Home Page............................................................................................................ 14
11 Device Configuration Page ............................................................................................... 17
12 Channel Configuration Page.............................................................................................. 21
13 Page Connections.......................................................................................................... 39
14 Main Device................................................................................................................. 40
15 USB interface............................................................................................................... 41
16 <Caption> ................................................................................................................... 41
17 Input filters – IN10-IN23 use 10 Ωinstead of 220 Ω................................................................... 41
18 SWITCH Board Schematic................................................................................................ 42

External Micro
Connector
MSP430
(U1)
3.3-V
Regulator
(U4)
INx
Connector
Channel
0í23
Battery or Power
Supply
+
_
5-V
Regulator
(U9)
Input Filter
Channel IN0to IN23
Test Point Test Point
DNP
TXB0106
(U10)
OE
TIC12400
(U11)
VDD VS
IN0
IN1
IN2
.
.
.
IN23
SPI
INT
RST
USB
Connector
x24
x4
ONBOARD EVM MONITORS:
x VDD Current Monitor (INA226A, U12)
x VSCurrent Monitor (INA226A, U13)
x Ambient Air Temp Monitor (TMP102AQ, U5)
x Case Temp Monitor (TMP102AQ, U2)
I2C
D3
SPI
INT
RST
SPI
INT
RST
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Introduction www.ti.com
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1 Introduction
The TIC12400 is a multiple switch detection interface that is designed to detect the opening and closing of
up to 24 switch contacts. 10 out of the 24 inputs are configurable to detect switch states that are either
battery connected switches (BCS) or ground connected switches (GCS), which means it can either sink or
source current from the channel. The remaining 14 channels are design to support ground connected
switches only (source current). The wetting current can be preprogrammed to six available values, which
accommodates for different application scenarios. Communication to and from the device is done using a
24-bit SPI protocol.
The TIC124000 and TIC12400-Q1 provide the same functionality and the TIC12400 Evaluation Module is
used for both devices.
Figure 1. TIC12400 EVM Block Level Diagram
The TIC12400 EVM is an evaluation module for the Texas Instruments TIC12400 and it provides basic
functionality evaluation for the device. When used together with the switch board, the EVM allows testing
of its functionality via SPI communication established to the PC using the USB adaptor.

Caution Hot surface.
Contact may cause burns.
Do not touch.
The DUT of the board can get hot when all channels are enabled at
the highest wetting current settings in continuous mode
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1.1 Warnings

+12.0 V
PC
Power
Supply
EVMSWITCH BOARD
USB
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2 Hardware
2.1 Kit
Two boards, EVM (TIC12400EVM) and SWITCH BOARD (TIC12400_SWB), are provided with an USB to
USB-MINI cable within the KIT; see Figure 2.
Figure 2. TIC12400 EVM, SWITCH BOARD, and USB to USB-Mini Cable
2.2 Connection to the PC and Powering up the EVM
A mini-USB cable is used to connect the EVM board to the PC. The VDD of the EVM is powered by the
USB’s VBUS. The positive terminal of the Power Supply is connected to the “VBAT” terminal of both the
EVM and SWITCH BOARD. The negative terminal of the power supply is connected to the “GND” terminal
of the EVM. Turn ON the power supply and set it to a nominal supply of +12 V, see Figure 3.
Figure 3. EVM, SWITCH BOARD, USB Cable, PC, and Power Supply Setup

Optional Circuitry or Functions
Required Circuitry
5
6
1
8
2
9
3
10 11
4
7
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2.3 EVM Hardware Description
The TIC12400 EVM is designed to allow the user to easily evaluate switch detection using the GUI. The
break down of all the features and design of the EVM follow.
Figure 4. EVM Hardware Top Description
1. Connect the TIC12400EVM to a supply using VBAT (J9) as the positive terminal of the supply and
GND (J10) to the negative terminal of the supply using standard banana cables. The supply can range
from 4.5V to 35V, but is nominally at 12V.
2. Connect the TIC12400EVM to your computer via the mini-USB cable provided. The actual connector is
located on the bottom side of the board. This will allow your computer to interface with the EVM and
communicate to the device.
3. Connect the Switch Board or your own switches via a mating connector to J2, which connects the
switches to the INx pins of the device.
4. U11 is the TIC12400 devices.
5. The EVM has several LED use to help the user indicate the status of the EVM
6. The device has three post regulator decoupling caps: VCAP_D, VCAP_PRE, and VCAP_A. There are test points
at each output capacitor for each of these three regulators.
7. The EVM facilitates the use of an external microcontroller by interfacing with SPI, INT, and RESET
pins of the device.
8. There is an optional Translator/Level shifter (TXB0106) on the EVM to ensure the ability to interface
with the device's SPI, INT, and RESET functions at various voltages set by VDD pin. The MSP430 is a
3.3-V device and does not support 5-V logic level without the TXB0106.
9. The EVM has the ability to do relative temperature measurements of the air using the TI TMP0104AQ

19
21,6,7,11,12
7
8
6
45
3
TPIC
TPCONNECTOR
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device.
10. There are place holders for a filter components on each channel of the EVM. There is a 100mil header
along the edge of the connector to measure signal at connector, and SMT test points to measure the
signal at the IC.
11. The filter capacitors at the pins of the device are not loaded by default and are there to allow the
design of filters if needed.
Figure 5. EVM Hardware Bottom Description

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1. The EVM has a blocking diode and large bulk capacitor. The blocking diode (D3) protects the EVM in
case the terminals of the battery are switched accidentally. The bulk capacitor (C24) adds a delay
between a battery disconnect and the device shutting down.
a. 2.1 There EVM has several jumpers for configuring the EVM in a variety of ways. J1: This jumper
connects the input of the 5V regulator to VS if inserted. (Default: Not Loaded)
b. 2.6 J6: This jumper connects a GPIO from the EVM micro (MSP430) to the output enable (OE) of
the TXB0106 level shifter by placing the jumper between pins 1 and 2. Placing the jumper between
pins 2 and 3 forces the translator to be on. If there is no jump on J7 then the pull down resistor
turns it off (OE=LOW) and places the level shifter in high impedance mode, preventing bus
contention between two possible masters on the SPI bus.
c. 2.7 J7: This jumper connects VDD pin of the device to either the onboard +3.3V supply generated
from the USB bus or connects to the onboard +5V regulator that is supplied from the battery.
Connecting pin 1 and 2 with a jumper connects VDD to +3.3V and connecting 2 and 3 with a
jumper connects VDD to +5V (this assumes J1 is also loaded). (Default: jumper across pin 1 and
2)
d. 2.11 J11: This jumper connects VS pin of the device to the bulk capacitor after the protection
diode.
e. 2.12 J12: This jumper gives the option of having the pull up resistor come from either VDD or VS.
Connecting pin 1 and 2 with a jumper, references the INT pin to VS. Connecting pin 2 and 3 with a
jumper references the INT pin to VDD.
2. The EVM has the ability to do relative temperature measurements of the device's case temperature
using TI’s TMP0104AQ device.
3. The MSP430's support devices, such as JTAG interface, crystal, programming button, and so forth.
4. The MSP430 bridges the communication from the computer’s USB cable to the device's SPI, INT, and
RESET lines. The MSP430 also interfaces with several supports circuits for measuring temperature for
air and case, measuring current to VDD, and measuring current to VS. The MSP430 also has the
ability to control OE pin of TXB0106 to facilitate control of the device by an external microcontroller.
5. The TPS73533 receives power from the VBUS of the USB, which is 5 V. It then regulates that to the
+3.3V output on the TIC12400 EVM.
6. There are two INA226A Current Monitors for measuring current in VDD (U12) and for measuring th
current going into VS (U13). The MSP430 interfaces with these devices using I2C and relays the
information through the UBS cable to the GUI on the computer.
7. There are four status LED on the EVM that take up power when in use. The header (J4) facilitates
removing the LED’s in the circuit to do system level power measurements accurately.
8. The TPS7A6650Q is a high voltage regulator that is able to take high voltage and regulate it down to
5V for use with higher voltage micro controllers. When J1 is removed the regulator’s input voltage is
removed and therefore it is disabled.

23-1 23-2 23-3 23-4 23-5
SW23_A SW23_B IN23
29
3
8
7
6
5 4
1
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3 SWITCH BOARD Hardware Description
1. The SWITCH BOARD (SWB) is designed such that ground offsets can be tested by removing J6,
which disconnects the Chassis Ground (CGND) from the EVM ground (GND). A supply can be placed
between GND and CGND to create the offset. If not testing this feature, then J6 is by default in place
and therefore CGND and GND are shorted together.
2. VBAT provides the power to the battery connected switches. Switch 0 to 9 are battery connected
switches.
3. J114 connects all the switches from the SWB to the inputs of the EVM.
4. J1, J2, and J3 are jumpers that connect SW0 to SW23 to IN0 to IN23 of the EVM. These jumpers
allow the user to disconnect the SW’s on the Switch Board to the EVM and provide a 0.1" head to
connect their own switch of their choosing to the EVM.
5. SW23A and SW23B are provided to test the device's ability to detect multi-resistor coded ground
referenced switch transitions. SW23A relate directly to the mapped thresholds for 3A, 3B, and 3C.
SW23B relate directly to thresholds 8 and 9 of the device. Switch 23-1-5 are designed to coincide with
one state for each instance of one switch being in the “CLOSED” position. Channel 23 of the device
has the ability to set up to 5 thresholds, which means there are 6 states. Each switch represents one
state and all switches in the “OPEN” position represents the 6th state.

X-2
OPEN
X-1
X-2
OPEN
X-1
X-2
OPEN
X-1
X-1 X-2
SWX INX
OPEN
X-2
OPEN
X-1
X-2
OPEN
X-1
X-2
OPEN
X-1
X-1 X-2
SWX INX
OPEN
X-1 X-2 X-3
SWX IN_X
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6. SW18 – SW22 are used to test up to 4 state resistor coded ground referenced switches. Each of the
channels have three ground connected switches labeled X-1, X-2, and X-3, which coincides with a
mapped threshold for 3A, 3B, and 3C. Each individual switch represents one of the three states and
the fourth state is when all switches are “OPEN”.
7. SW12 – SW17 are used when up to two thresholds (three states) is needed for the switch application.
Each of the channels have two ground connected switches labeled X-1 and X-2, which coincides with
a mapped threshold for 2A and 2B, and a switch position called “OPEN” to represent the third state.
8. SW10 and SW11 are used when up to two thresholds (three states) is needed for the switch
application. Each channel from 0 to 11, has one unique threshold mapping for each channel and one
common threshold (THRES_COM) that is shared for all the channels (0-11). These switches are setup
to illustrate this feature.

X-1
OPEN
X-2
OPENOPEN
SWX
X-1
X-2
OPEN
VBAT
IN_X
X-1
X-2
X-1
X-2
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9. SW0 to SW9 are designed to test the device ability to detect digital switches that are either referenced
to a battery connected switch or ground connected switch. There are two state, “OPEN” and either
chassis Ground Connected Switch (GCS) or Battery Connected Switch (BCS).

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4 GUI Software Installation
The GUI software is required to establish the communication between the EVM boards and the PC and it
also provides the GUI interface to read/write registers information on device. The following section
described the software installation procedure.
Step 1. Download the GUI software
The software can be downloaded on TI server at link goes here. Please inquiry with a TI representative
if you don’t have access to the files.
Step 2. Software installation
Go to location that the executable was downloaded to and either double-click the Setup_TIC12400-
0.4.0_EVM.exe file to begin software installation or right click and select “Run as administrator”. The
software will install two applications, “App Center” software and the TIC12400 GUI App software. If the
“App Center” software isn’t already installed on the PC then additional steps will be needed. Those
steps are outlines in the following figures.
Figure 6. Setup_TIC12400-0.4.0_EVM.exe
Follow the on-screen instructions to complete the setup. The process may take up to 10 minutes
depending on your computer speed.

This screen should show up shortly after step
5. This screen should appear on top, unless the
user clicks on another item. Sometimes the
screen may appear to be behind the other
setup screen. The TIC12400 EVM GUI will not
install until the App Center software is first
installed.
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Figure 7. Installation Steps 1–6

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Figure 8. Figure 3. Installation Steps 7–13
The EVM GUI can either be opened before or after the EVM is setup and power is applied.

10
2
1
9
3 4 5 6 7
8
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5 TIC12400 GUI Application
5.1 Starting the GUI
After the EVM and SWITCH BOARD are connected and then the cables are connected the Power Supply
and PC via USB cable, the GUI can be run by double clicking the shortcut icon on the desktop, see
Figure 9.
Figure 9. Double Click on “App Center EVM GUI” Shortcut to Open
5.2 TIC12400 Info Page
The “Info” page (Home) of the TIC12400 GUI has a short summary of the features of the TIC12400. See
the following map of features of the “Info” page in Figure 10.
Figure 10. GUI Home Page

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1.
The Menu bar has several sub menus that are within “File”, “Tools” and “Help” drop down menus.
“File” drop down menu provides access to “Saving Registers”, “Save Registers As”, and “Load
Registers”. This means switch profiles can be saved and loaded as needed.
“Tools” drop down menu provides access to the Logging feature of the GUI. This records both
SPI Reads and Writes.
“Help” drop down menu provides access to information pertaining to GUI version and MSP430
firmware revision.
2.
The Menu bar can be clicked to show the minimized and maximized menu, default is minimized.
The buttons on the bar are from top to bottom as follows:
• Intro (Home): Brings the user back to the Intro screen
• Channel Configuration: Page to configure the channels
of the device in a graphical format
• Configuration Wizard: Guided setup of MSDI based on
system level requirements
• Device Settings: Access device settings without manually
adjusting the register settings
• Real Time Status Tracker: Live visual monitoring of
channel inputs
• Matrix Configuration: Graphical configuration of the
Matrix mode settings
• Polling mode current calculator: Page to calculate the
current consumption of the devicewhile in polling mode
with multiple settings, and Register Map. These are also
available buttons on the right of the “Intro” page.
• Registers: Register access page
3. Quick Start. Opens up a sub menu with two options.
1. A configuration wizard that walks through the system level use case to setup the device
2. Load default configuration for the device
4. The settings button will open a sub menu for Channel Configurations, Device Settings and Matrix
configuration. These are the same pages accessed by the men bar on the left side of the GUI.

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5. The tools button will open a sub menu to access the Polling Mode current Calculator and Real-
Time Status Tracker pages.
6. Clicking on the register map button will direct the user to the Register map page via a sub menu.
7. Reference materials button that pulls up links to the EVM User’s Guide, Datasheet and a
reference video.
8. Benefits banner. Clicking on the links in this section will show greater details on the device
benefits and how they differ from today’s implementations.
9. The button toggles ON/OFF the Log page, which is also seen in the Tools->Log pane.
10.
If the EVM is connected to the PC with the USB cable then the GUI will show that it is connected
by showing a green dot. If there is no communication with either the on board micro controller
(MSP430) or the device then the following image will be seen, indicated no communication.

1
6
7
12
11
10
9
2
3
4
5
8
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5.3 Device Settings Page
The Device Configuration page controls many of the features for TIC12400 that control device general
operation.
Figure 11. Device Configuration Page

)
)
)
)
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1.
The device has a variety of setting and features that are accessed and controlled by doing read
and writes to the device. It is important to note that when selecting and changing setting within
the GUI it must be written to the device prior to initiating the activation of the device by clicking on
the “Trigger” button. Once the Trigger is turned ON all registers become read only (with the
exception of the CRC_T, RESET, and TRIGGER bits). Trigger initiates the wetting currents and
starts external switch monitoring.
2.
The device has several features that help ensure robust communications to and from the device
to the micro controller on the SPI bus. Interrupts can be generated in the INT pin of the device to
communicate to the user that either “SPI_FAIL”, “PARITY_FAIL”, or “CRC_CALC_COMPLETE”
fault has occurred.
3.
The device has the ability to alert the user when Switch State Change (SSC) has occurred. The
Channel Configuration sets the conditions that initiate a SSC. If this feature is not selected then
the SSC is recorded but the INT pin is not asserted. This is also true for the VS0 and VS1 voltage
state change. There are four different thresholds (VS0_THRES2A/B and VS1_THRES2A/B) that
can be set for VS measurements to establish state changes. If the VS0/VS1 Threshold Crossing
features are not selected then the INT pin is not asserted after a state change, but it will be
stored in the device and the user must read the device to determine that the a state change
occurred.
4.
If the "Wetting Current Diag" is selected then an INT assertion occurs if any of the "Wetting
Current Diag – IN0/1/2/3" fail. If the "ADC Diag" is selected then an INT is asserted if the ADC
Diag fails
5.
The device has the ability to assert the INT pin when System Faults occur such as “Over
Voltage”, “Under Voltage”, “Temperature Warning”, and “Temperature Shutdown”.
6.
This button sends a software reset to the device via SPI. This will reset all registers to their
default setting! The user must write back all the registers before selecting “Trigger” and to start
wetting current and start external switch monitoring.

*
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7.
The TIC12400 GUI monitors the INT pin approximately at every second. There is an INTERUPT
led on the EVM lights up when the INT pin is asserted. This coincides with the INT icon. Once the
INT is asserted then selecting the READ button reads the INT_STAT register which clears the
INT assert
If the Auto-Read interrupt register features is selected then the GUI will automatically read the
INT_STAT register every 5 seconds, which will clear the INT and record the INT_STATE register
information into GUI, but it does clear the INT_STAT register within the device.
8.
The Wetting Current Auto-Scaling feature allows the user to enable or disable the auto scaling
feature in continuous mode.
9.
The Temperature warning and wetting current reduction feature provides the ability to enable or
disable the wetting current reduction feature when a Temperature warning event occurs.
10.
The TIC12400 has the ability to do an ADC diagnostics and also has the ability to test wetting
currents on IN0, IN1, IN2, and IN3 and diagnose if there are faults.

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11.
The TIC12400's advanced settings have several features that allow the user to optimize their
switch state change monitoring system. VS measurement can be enabled or disabled here. Once
enabled the advanced settings menu becomes accessible to the right of the checkbox.
Accessing the VS Measurement settings will allow the user to select the channel, resistor divider
ratio and select the thresholds. The thresholds can be shown in volts or ADC thresholds or volts.
The Operation mode and timing settings can also be configured between polling and continuous
mode.
Clicking the Settings cog opens the timing settings menu to configure the polling mode.
The CCP or clean current polling settings can also be configured by clicking the configure CCP
option. This will allow the user to enable CCP by channel and select the current to be either 10
mA or 15 mA by group.
Additional the detection filter can be adjusted and the Interrupt assertion scheme can be
selected.