Texas Instruments LM8330EVM User manual

Using the LM8330EVM Evaluation Module
User's Guide
Literature Number: SNVU166
FEBRUARY 2013

Contents
1 Introduction ........................................................................................................................ 4
1.1 List of Hardware Items for Operation ..................................................................................... 4
1.2 List of Software Items for Operation ...................................................................................... 4
1.3 Step-by-step Instructions for Operation and Troubleshooting ........................................................ 5
1.4 Hardware Uninstall Instructions ........................................................................................... 5
1.5 Software Uninstall Instructions ............................................................................................ 5
2 EVM Configuration and Description ....................................................................................... 6
2.1 EVM Options ................................................................................................................. 6
2.2 LED (D1) Indication of USB Attached .................................................................................... 6
2.3 Input/Output Connector Description ...................................................................................... 6
2.4 Test Point Connectors ...................................................................................................... 6
2.5 Schematics ................................................................................................................... 7
2.6 Layout ....................................................................................................................... 10
2.7 Bill of Materials ............................................................................................................. 12
3 GUI Configuration and Description ...................................................................................... 14
3.1 GUI Installation ............................................................................................................ 14
3.2 GUI Functionality .......................................................................................................... 15
3.2.1 Control Access .................................................................................................... 15
3.2.2 Initialization and LED Control ................................................................................... 18
3.2.3 I2C Byte Access .................................................................................................. 18
3.2.4 LM8330 Registers ................................................................................................ 18
3.2.5 Keypad Status .................................................................................................... 18
3.2.6 Keypad Test ....................................................................................................... 19
4 Related Documentation from Texas Instruments ................................................................... 21
2Contents SNVU166–FEBRUARY 2013
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List of Figures
2-1. LM8330EVM Schematic Sheet1 .......................................................................................... 7
2-2. LM8330EVM Schematic Sheet2 .......................................................................................... 8
2-3. LM8330EVM Schematic Sheet3 .......................................................................................... 9
2-4. LM8330EVM Top Layer .................................................................................................. 10
2-5. LM8330EVM Bottom Layer .............................................................................................. 11
3-1. LM8330EVM GUI Installation Files...................................................................................... 14
3-2. LM8330EVM GUI Install.................................................................................................. 15
3-3. LM8330 GUI Initial Screen ............................................................................................... 16
3-4. LM8330 GUI Open Success Screen.................................................................................... 16
3-5. LM8330 GUI Open Error Screen........................................................................................ 17
3-6. LM8330 GUI Close Screen............................................................................................... 17
3-7. LM8330 Initialization Example........................................................................................... 18
3-8. LM8330 GUI Keypad Test................................................................................................ 19
3-9. LM8330 GUI Keypad Test Passed Example .......................................................................... 19
3-10. LM8330 GUI Keypad Test Failed Example ............................................................................ 20
List of Tables
1-1. Device and Package Configurations ..................................................................................... 4
2-1. Test Point Descriptions..................................................................................................... 6
2-2. Bill of Materials............................................................................................................. 12
3
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Chapter 1
SNVU166–FEBRUARY 2013
Introduction
The Texas Instruments (TI) LM8330 evaluation module (EVM) helps designers evaluate the operation and
performance of the LM8330 I2C ™ Keyscan Controller. The LM8330 keyscan operates from a 1.8V supply
and supports 7- and 10-bit I2C addressing in both Standard (100 kHz) and Fast (400 kHz) modes. It offers
exceptional ESD performance designed to tolerate IEC6100-4-2 level 4 ±8 kV direct contact. With 20
configurable GPIO pins, it can support 12x8 keypad array. This operation frees the processor from
scanning the keypad for presses and releases, thus saving power and bandwidth of the system.
The LM8330EVM serves as an I2C interface adapter between a host PC, the LM8330, and/or other I2C-
compatible devices externally connected to the EVM. The communication between the EVM and host PC
is via USB (through a standard type-A to type-B USB cable), while the communication between the EVM,
the LM8330, and/or other slave devices is via I2C bus. The EVM converts communication transactions
between the USB and I2C. The LM8330EVM is a USB powered device with no external power supply
required.
1.1 List of Hardware Items for Operation
To operate the LM8330EVM, the following items are required:
• The LM8330EVM
• Standard type-A to type-B mini-USB cable
• PC with Windows XP, Win7 or later operating system installed
The LM8330EVM contains a USB-to-I2C convertor (MSP430F5529), USB ESD Protection, LDOs, Level
Shifters, and the LM8330.
Table 1-1. Device and Package Configurations
Reference Designator Device Package
U1 MSP430F5529IPN LQFP-80
U2 LM8330 YFQ-25
U3 LP5990TM-1.8/NOPB YFQ-4
U4 SN74AVC1T45YZPR YZP-6
U5 TPS73533DRB DRB-8
U6 TPD4E004DRY DRY-6
U7 SN74AVC1T45YZPR YZP-6
U8 PCA9306DQER DQE-8
1.2 List of Software Items for Operation
In addition to the hardware items listed in Table 1-1, this software is required:
• Demo GUI Software (LM8330.exe)
The software can be downloaded from the TI website at www.ti.com.
The EVM is recognized by a PC as a generic human interface device (HID), which is supported by the
built-in USB/HID drivers of the Windows XP or later operating system. Therefore, it is plug-and-play, and
no proprietary USB driver is required.
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www.ti.com Step-by-step Instructions for Operation and Troubleshooting
1.3 Step-by-step Instructions for Operation and Troubleshooting
After downloading and installing the GUI demo software, follow these steps to operate the EVM:
• Plug the USB cable into both the PC and the EVM and wait for the LED to illuminate.
Troubleshooting: if the LED does not illuminate after 30 seconds, follow these steps:
– Verify that the USB cable is securely connected.
– If the connection is secure, try a different USB port.
– If the problem persists, try rebooting the PC.
– If the problem still persists, try a different USB cable.
– If these steps did not solve the problem, contact TI technical support for help.
• Run the LM8330EVM GUI software and follow the instructions for the GUI (refer to Chapter 3).
1.4 Hardware Uninstall Instructions
Unplug the EVM from the USB port to uninstall the hardware from the host PC.
1.5 Software Uninstall Instructions
For Windows operating system, go to Control Panel > Add or Remove Programs to remove the LM8330
GUI software.
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Chapter 2
SNVU166–FEBRUARY 2013
EVM Configuration and Description
2.1 EVM Options
The hardware is based on the TI MSP430 16-bit, ultra-low power, mixed signal micro-controller with
integrated USB. The PCB is a four-layer board with components mounted on both top and bottom layers
(refer to SCHEMATIC).
2.2 LED (D1) Indication of USB Attached
A green LED is mounted adjacent to the USB (J3) connector on the EVM. Every time the USB interface
adapter is attached to a PC via a USB cable, and if the host PC detects it and goes through enumeration
successfully, the embedded firmware illuminates the LED (D1); otherwise, the LED remains off. After
unplugging the USB cable, the LED turns off immediately.
2.3 Input/Output Connector Description
J2 - Input/Output is the keypad IO connector. This connector provides the connection between the keypad
and the LM8330.
J3 - Input is the USB input connector. This connector provides USB data communication, 5V Power In and
ground (GND) connections.
J4 - Input/Output is the I2C input/output connector. This connector provides access to the I2C SCL and
SDA signals for monitoring from an external device.
2.4 Test Point Connectors
Test point connectors TP1 through TP4 allow the users to verify internal power rails on the LM8330EVM.
describes the functions of all of the test points on the EVM.
Table 2-1. Test Point Descriptions
Test Point Signal Functionality
Connect to DMM positive terminal to monitor the LM8330 1.8V power
TP1 1.8V Test Point rail
Connect to DMM negative terminal to monitor the LM8330 1.8V power
TP2 GND Test Point rail
Connect to DMM negative terminal to monitor the LM8330 3.3V power
TP3 GND Test Point rail
Connect to DMM positive terminal to monitor the LM8330 3.3V power
TP4 3.3V Test Point rail
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www.ti.com Schematics
2.5 Schematics
Figure 2-1. LM8330EVM Schematic Sheet1
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Schematics www.ti.com
Figure 2-2. LM8330EVM Schematic Sheet2
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www.ti.com Schematics
Figure 2-3. LM8330EVM Schematic Sheet3
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Layout www.ti.com
2.6 Layout
Figure 2-4. LM8330EVM Top Layer
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