TDA5150 Datasheet, PDF (28/106 Pages) Infineon Technologies AG – On-chip, high resolution fractional-N synthesizer and Sigma-Delta modulator with ASK, FSK, GFSK options

TDA 5150
TDA 5150 Functional Description
2.4.4 Data Encoder
The Data Encoder is used in the so-called Synchronous Transmission Mode.
A description of this transmission mode is found in Chapter 2.4.11.2 Synchronous
Transmission.
In Synchronous Transmission Mode the Encoder has to be used. If no specific encoding
of SDIO data shall be done, select NRZ as encoding scheme.
Definition: ´bit-rate´ is the number of transmitted bits per second and expressed in
[bits/sec]. Besides NRZ all the other implemented encoding methods split a single bit into
two elementary parts, the so-called chips. Therefore we also talk about a chip-rate,
which is an “n” multiple of the data-rate.
For NRZ (which means no extra encoding) n =1 (data-rate = chip-rate), and for all other
implemented encoding methods n = 2, or the chip-rate is twice the bit-rate.
The TDA 5150 supports the following encoding types:
• Manchester code
• Differential Manchester code
• Bi-phase space code
• Bi-phase mark code
• Miller code (Delay modulation)
• NRZ
• Scrambling (PRBS9 generator)
All encoded bitstreams can be level inverted (as part of the encoding option)
Data 1 0 1 0 0 1 1 0
Clock
NRZ
Manchester
Differential Manchester
Biphase Space
Biphase Mark
Miller
PRBS
Scrambling
Figure 10 Coding Schemes
Data Sheet
28
V 1.0, July 2009