3.3.2Low speed bit format

1 bit is generated with twenty-two HSI oscillator pulses.

The bit format is:

-2 pulses at ‘0’ followed by 20 pulses at ‘1’ for ‘1’ value.

-20 pulses at ‘0’ followed by 2 pulses at ‘1’ for ‘0’ value.

When the SWIM receives a data packet, it will decode:

-‘1’ when the number of consecutive samples at ‘0’ is less or equal to 8.

-‘0’ when the number of consecutive samples at ‘0’ is greater or equal to 9.

Figure 7. Low speed bit format