TDA5230 데이터 시트보기 (PDF) - Infineon Technologies

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TDA5230

Universal Low Power ASK/FSK Single Conversion Multi-Channel Image-Reject Receiver with Digital Baseband Processing

Infineon Technologies 

TDA523x

1.6.2 Baseband Processing

Product Description

TDA523x has integrated all means to process incoming ASK or FSK modulated

Manchester-coded bit streams, and convert them into pure data, which can be read out

via SPI by the host processor.

RF Input

RF Engine:

amplifier, down

converter, filter

Down Converted RF

Manchester Coded

Demodulator

Bit Stream

Manchester Complete Data

Decoder

Frames

Framer

Payload Data

FIFO

Interrupt,

SPI

Figure 3 Internal Data Processing Flow

The Manchester-coded bit stream is decoded by the Manchester Decoder into a bit

stream containing the wake-up pattern, the TSI (Telegram Start Identifier) and the

payload. The Framer separates the payload and stores it in the FIFO. An interrupt is

generated and data can be read from the FIFO by the host processor via SPI.

1.6.3 Autonomous Self Polling

The TDA523x offers a fully autonomous Self Polling Mode, in which the RF input signal

is scanned for valid data signals base on programmable timing. The host processor is

not burdened with this task, so its full processing power is available for other tasks, or

the host processor may stay in a power save, or sleep mode. When valid data has been

Data Sheet

7

Version 4.0, 2007-06-01

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