Datasheet

BUF22821EVM-USB Software Overview

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Figure 16 shows an error that pops up if the computer cannot communicate with the EVM. If you receive

this error, first ensure that the USB cable is properly connected on both ends. This error can also occur if

you connect the USB cable before the USB_DIG_Platform power source. Another possible cause for this

error is a problem with the USB Human Interface Device Driver on the computer you are using. Make sure

that the device is recognized when the USB cable is plugged in; this action is indicated by a

Windows-generated confirmation sound.

Figure 16. Communication Error with USB_DIG_Platform

6.2 Using the BUF22821 Software

6.2.1 I

C Address Selection

As mentioned previously (refer to Section 4.5), jumper JMP5 is used to set the I

C address pin of the

BUF22821. Figure 17 shows how the hardware and software must both be set to enable communication

between the BUF22821EVM-USB and the software. Without jumper JMP5 and the software address

button configured correctly, the software cannot communicate with the BUF22821 device.

Figure 17. JMP5 Setting for Logic ‘0’

BUF22821EVM-USB Evaluation Board and Software Tutorial SBOU117–September 2011

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