UM0934 datasheet(107/113 Pages) STMICROELECTRONICS

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UM0934

MAC mode communication example

Doc ID 17389 Rev 2

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CMD_SynchroIndication

As this is the first transmission performed after the modem configuration (step 1), station1

generates locally a CMD_SyncIndication() to notify that a time-slot synchronization has

been successfully found:

As the node was not synchronized, no estimation is performed. Therefore, values of fields

S0, N0, S1, N1, PGA, phase are equal to zero while field Sync is as follows::

●

Sync=01h means that the time-slot synchronization has been achieved (but still to be

confirmed)

CMD_DataConfirm

As soon as the transmission over the power line is complete, station1 generates locally a

CMD_DataConfirm() as follows:

The data value equal to FFh (LP_OK, Section 5.3.13) notifies that the transmission

completed successfully.

10.3.2

Station2 (Server)

CMD_SynchroIndication

The reception of the PRE+SSD sequence causes station2 to generate locally a

CMD_SynchroIndication():

The Label values can be decoded in the same way as in Section 10.3.1:

●

Sinc=01h means that the modem synchronization has been achieved

●

S0:

0028DFh = 10463d

⇒ 104.63 dBµV

RMS

●

N0:

001722h = 5922d

⇒ 59.22 dBµV

RMS

●

S1:

002903h = 10499d

⇒ 104.99 dBµV

RMS

●

N1:

0016B0h = 5808d

⇒ 58.08 dBµV

RMS

●

PGA=04h

●

Phase=01h

STX Length

Command

Code

DATA

CHK

02h 12h

10h

23.00h

Syn c

00.00.00h

01h

00h

PGA

00.00.00h

00h

Ph ase

STX

Length

Command

Co de

DATA

CHK

02h 04h

52h

55.01h

FFh

STX Length

Command

Code

DATA

CHK

02h 12h

10h

5A.02h

Syn c

DF.28.00h

01h

04h

PGA

22.17.00h

03.29.00h B0.16.00h

01h

Ph ase

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