UM1518 datasheet(16/37 Pages) STMICROELECTRONICS

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UM1518

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The four buttons in the Modem configuration tab, highlighted by the red squares, execute

correspondingly:

●

Modem configuration write: it performs an “MIB Write Request” command automatically

built with MIB index 00h and data as selected in the objects above;

●

Modem configuration read: it performs an “MIB Read Request” command automatically

built with MIB index 00h; if the command is properly executed, the data contained in the

expected “MIB Read Confirm” (sent by the ST7580) is extracted and displayed in the

objects above;

●

PHY configuration write: as the previous “Modem Configuration Write”, it performs an

MIB Write Request on the MIB object 01h (PHY layer configuration);

●

PHY configuration read: as the previous “Modem Configuration Read”, it performs an

MIB Read Request on the MIB object 01h (PHY layer configuration).

5.2

Power line communication: transmission and reception

In order to put into place a proper power line communication through the GUI, it is enough to

power on the EVALST7580-1 and to open the USB port as explained in Section 4.2.

The “Communication” tab contains all the parameters for ST7580 commands related to

power line communication:

●

“Transmission” box: refers to three “Data Request” commands and contains all their

parameters and data to allow the user to choose the transmission settings;

●

“Confirm” box: displays the parameters of the last “Data Confirm” received from the

ST7580 device;

●

“Reception” box: shows the parameters and the data of the last “Data Indication”

received.

5.2.1

Power line transmission command

As shown in Figure 12, the transmission box contains:

The “TX Layer” drop-down menu: through this parameter it is possible to choose which

kind of Data Request command the GUI addresses to the ST7580.

–

The PHY_Data selection determines a “PHY Data Request” command;

–

The DL_Data selection determines a “DL Data Request” command;

–

The SS_Data selection determines a “SS Data Request” command.

All transmission parameters to be filled in a data request command; note that:

–

“TX Gain” value is accessible if “Gain Selector” bit is equal to “Custom” value only;

–

“SS Header Length” value is accessible if selected “TX Layer” value is equal to

“SS_Data” only.

The Payload box where the data to be transmitted must be expressed in hexadecimal

characters;

The length (in bytes) of the inserted Payload data, automatically calculated and

displayed.

The Data Request button that builds a Data Request command and transmits it to the

ST7580 connected device.

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