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Use Case

1. Enter the Frame PID in Edit Box corresponding to “Rx Frame PID”. The PID must be entered in hex.

Note that valid PID ranges from 0x00 to 0x3F. The GUI software calculates the parity bits using the

LIN 2.1 method before the PID is transmitted.

2. Enter the number of data bytes the user expects back from the PGA450-Q1

3. Select the CLASSIC or ENHANCED checksum

4. Click on the RECEIVE button

The data received from the PGA450-Q1 is displayed in the Data Received box.

If the data communication is not working, try Reset This Application, which power-cycles the LIN master

IC on the EVM.

12 Use Case

The purpose of this section is to provide step-by-step instructions on the setup and some basic evaluation

procedures.

12.1 Evaluation Through SPI Communication

In order to provide a quick evaluation of the IC performance using the TI EVM and GUI without having to

develop sophisticated 8051 µP software, the GUI provides an intuitive interface tab, Evaluation Tab, that

collects all necessary information regarding the transducer drive and receive. For transducer drive, it

includes: transducer frequency; transducer drive voltage, VREG; transformer configuration; and number of

drive pulses. For transducer signal receive, it includes signal-processing parameters: LNA gain setting;

BPF and LPF coefficient; clock selection; FIFO mode; and FIFO downsample size.

1. Make sure all jumpers are connected according to the default settings, see Section 6.2.

2. Connect the hardware and power supply, see Section 5. Make sure USB cable is connected to the

computer and the interface board. It is recommended to monitor power supply current. Normal idle

current is around 6 mA. Active current is around 15 mA.

3. Launch GUI software on computer.

4. Click the "OFF (Micro Reset)" button to put the Micro in reset, then click READ ALL to read the default

that there is an error with communication to the device. Check the hardware setup or restart the GUI

software.

Fill out the "Evaluation" tab with the values shown in Figure 10.

Use the "Eval Monitor" tab to send bursts and view the resulting echo data.

SLDU007A–March 2012–Revised January 2013 PGA450-Q1 EVM User’s Guide

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