USB-TO-GPIO datasheet(10/50 Pages) TI1

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1.2

List of Software Items for Operation

1.3

Step-by-Step Instructions for Operation and Troubleshooting

List of Software Items for Operation

In addition to the previously listed hardware items, the following software also is needed:

• I2C/GPIO/PMBUS/SMBUS transport layer DLL driver (PMBus Transport (USB HID).dll) created by TI

• Demo GUI software (USB SAA GUI.exe) for I2C/GPIO/PMBUS/SMBUS application

Both can be downloaded from the TI website in the file "USB interface adapter GUI.zip", which also

contains other accessory files.

The USB interface adapter 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 operating system. Therefore, it is plug and play

and no proprietary USB driver is required.

After you have downloaded and installed the transport DLL and the GUI demo software, follow these steps

to operate the USB interface adapter:

1. Plug in the USB cable to both the PC and the USB interface adapter and wait for the green LED to

illuminate.

Troubleshooting: If the green LED does not illuminate after 30 s, check to ensure the USB cable is

securely connected. If the connection is secure, try a different USB port. If a different USB port does

not solve the problem, try to reboot the computer. If rebooting the computer does not fix the problem,

try a different USB cable. If trying different USB cable does not solve the problem, contact TI technical

support for help.

2. Plug in the 10-pin ribbon cable to both the USB interface adapter and an I2C slave board. Make sure

that the notch on the ribbon-cable connector matches the keyhole of the socket in the enclosure.

3. Power up the I2C slave board. Note that the default I2C speed is set at 100 kHz and the default pullups

for I2C data and clock lines are set at 2.2 k

Ω.

4. Run the DEMO GUI software and follow the instructions for the GUI.

Troubleshooting: If the I2C slave board cannot talk with the USB interface adapter, first check to

ensure the 10-pin ribbon cable has been securely connected. If the ribbon cable has been securely

connected, check the I2C communication speed and the pullups for I2C data and clock lines suitable for

the application. If not, modify the I2C communication speed and the pullups accordingly. If this still

does not solve the problem, contact the manufacturer of the I2C slave board for help.

Introduction

SLLU093 – August 2006

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