UM1657 datasheet(32/48 Pages) STMICROELECTRONICS

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SPIRIT1 DK - GUI description

UM1657

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DocID025094 Rev 1

3.2.8

Packet setting - BASIC

As shown in Figure 21, selecting BASIC (default configuration), SPIRIT1 DK - DB uses the

packet format BASIC described in the datasheet. The options for the packet are:



Preamble length



Sync length



Sync value



CRC



FEC



Data whitening

These entire fields can be changed according to these limits:



Preamble length in the interval: [1 - 32] bytes.



Sync length in the interval: [1 - 4] bytes.



CRC:

– NO CRC.

– Poly 0x07 (1 byte).

– Poly 0x8005 (2 bytes).

– Poly 0x1021 (2 bytes).

– Poly 0x864CFE (3 bytes).

The "FEC" and the "Data whitening" can be checked or not according to the desired setting.

In particular, if the "FEC" is checked, this feature is used during the transmission; the same

apply for "Data whitening".

3.2.9

Packet setting - WMBUS

As shown in Figure 22, selecting MBUS, SPIRIT1 DK - DB uses the packet format MBUS

described in the datasheet. The options for the packet are:



MBUS submode.



Preamble length.



Postamble length.



FEC.



Data whitening.

These entire fields can be changed according to these limits:



Preamble length in the interval: [0 - 255] chip sequence (01).



Postamble length in the interval: [0 - 255] chip sequence (01).



MBUS submode:

–

S1, S2, long header.

–

S1m, S2, T2 other to meter.

–

T1, T2, meter to other.

–

R2 short header.

–N1a-f, N2a-f

The "FEC" and the "Data whitening" can be checked or not according to the desired setting.

In particular, if the "FEC" is checked, this feature is used during the transmission; the same

apply for "Data whitening".

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