TDA5150 Просмотр технического описания (PDF) - Infineon Technologies

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TDA5150

Multichannel / Multiband Transmitter

Infineon Technologies 

TDA 5150

Product Description

1.5.5 Integrated Data Encoder

TDA 5150 comprises a Data Encoder which automatically generates encoded data from

a regular (NRZ) bitstream. The supported data encoding modes are:

• Manchester code

• Differential Manchester code

• Bi-phase space code

• Bi-phase mark code

• Miller code (Delay modulation)

• NRZ

• Scrambling (PRBS9 generator)

All the encoded bitstreams can be level inverted (as part of the encoding option). The

scrambling module (PRBS9 generator) is intended to be used for generation of pseudo-

random data patterns (rather for Tx test scopes) or for basic level data encryption.

1.5.6 Fail-Safe Mechanism

The Transmitter Status Register reports about failures such as: Brownout event, PLL

lock error, VCO auto-calibration error and Register Parity error.

The Register Parity is a special safety feature. Each SFR (Special Function Register)

has an extra parity bit which is automatically calculated and stored during a SFR write

operation. During transmitter active state these parity bits, belonging to SFR content are

continuously recalculated and compared against the stored values. Changes in the

contents of writable SFRs without write command generate an SFR error event and an

error flag is set.

To prevent erroneous transmissions (on wrong frequency or with erroneous modulation

parameters, altered payload etc.) the activation of Fail-Safe mechanism is coupled with

deactivation (switching off) of the RF Power Amplifier stages.

This additional feature inhibits the transmission if errors occur, thus preventing the

transmission of erroneous datagrams or on false frequency

For details see the associated SFR description, and their interaction with the Fail-Safe

Mechanism, as described in Chapter 2.4.10.

Data Sheet

10

V 1.0, July 2009

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