TDA5240 Datasheet, PDF (42/284 Pages) Infineon Technologies AG – Enhanced Sensitivity Multi-Channel Quad-Configuration Receiver

TDA5240
Functional Description
2.4.8.2 Encoding Modes
The IC supports the following Bi-phase encodings:
• Manchester code
• Differential Manchester code
• Bi-phase space code
• Bi-phase mark code
The encoding mode is set and enabled by bit group CODE in x_DIGRXC configuration
register.
Data _{1 0 1 0 0 1 1 0}
Clock
Manchester
Differential Manchester
Biphase Space
Biphase Mark
Figure 17 Coding Schemes
The encoding modes Inverted Manchester and Inverted Differential Manchester can also
be decoded internally by usage of CHIPDINV bit in x_DIGRXC register (see Figure 15).
All the Manchester symbol combinations including Code Violations are shown in
Figure 18. Digital 0 and 1 are coded with the change of the amplitude in the middle of
the symbol period. The Code Violations (CV) M (mark) and S (space), are coded as
low/high signal levels.
0
1
S
M
Figure 18
1st 2nd
Chip Chip
1st 2nd
Chip Chip
1st 2nd
Chip Chip
1st 2nd
Chip Chip
Manchester Symbols including Code Violations
Data Sheet
42
V4.0, 2010-02-19