Q6275K791 View Datasheet(PDF) - Infineon Technologies

Part Name

Description

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Q6275K791

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

Infineon Technologies 

TDA523x

Functional Description

Notes to State Diagram Run Mode Slave:

1.) Wait: Waiting until start up sequencer has completed the power up procedure.

2.) Init: The Receiver will be initialized and the FIFO will be initialized when the SFR

control bit INITFIFO is set. Read out the Modulation Type Configuration (ASK or

FSK), which is defined in the SFR control bits AMT/BMT and set the device to the

configured mode. Set the channel to the correct value, which is defined in the

ARFPLL1/BRFPLL1 register.

3.) FIFO locked: When the signal fifolk is set, the chip enters this state and remains

there until the signal fifolk is reset. In this state, no further data reception is possible

and therefore, no SYNC or FSYNC will be generated, even if a data-packet is present

in the received data stream. (More information on the FIFO behavior can be found in

chapter Chapter 2.4.15 Data FIFO).

4.) Wait: Wait until symbol synchronization is complete. A loss of symbol

synchronization always leads into this state, whatever the current state is. This state

is left only, if symbol-synchronization can be established on the received data stream.

(More information on the synchronization behavior can be found in Chapter 2.4.13

Frame Synchronization).

5. Wait: Wait until a start of a data packet (frame) is detected. All bits received from

FSYNC until the detection of EOM will be transferred to the FIFO.

6.) INIT FIFO: The FIFO will be initialized, if the SFR control bit FSINITFIFO is set

7.) Check MID Setup: Check the configuration of the Message ID Unit. Depending on

the SFR control bit MIDSEN a Message ID scanning is started or not. If no Message

ID scanning is selected, the next state is the state EOM check. Otherwise the

Message ID scanning unit is activated to search for a valid Message ID.

8.) Init MID Scanning Unit: Initialize the Message ID scanning unit.

9.) Wait: Wait until the Message ID scanning unit has finished the search for a valid

message ID. All incoming data is stored in the FIFO.

10.)Checking ID Scanning Result: The result of a search for a Message ID is checked.

If no valid MessageID was found, a search for a new frame is started. Be aware that

all received bits after FSYNC were stored in the FIFO, even if no Message ID was

found. After a successful search for a Message ID , the next state will be EOM check.

11.)EOM Check: Incoming data bits are transferred to the FIFO until an EOM is

detected. The criteria for EOM are defined in the AEOMC/BEOMC register. If the

SFR control bit FIFOLK is set, the signal fifolk will be asserted at EOM. Depending

on the state of fifolk, the next chip state will be FIFO locked or Wait for Symbol

Synchronization.

Data Sheet

37

Version 4.0, 2007-06-01

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