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RF63

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3.4.10.3. Alternative OOK Demodulator Threshold Modes

In addition to the Peak OOK threshold mode, the user can alternatively select two other types of threshold

detectors:

•

Fixed threshold: The value is selected through the MCParam_OOK_floor_thresh register (refer to section

3.4.10.1 for further information concerning optimization of the floor threshold).

•

Average threshold: Data supplied by the RSSI block is averaged with the following cutoff frequency:

In the first example, the higher cut-off frequency enables a sequence of up to 8 consecutive

“0” or “1” to be

supported, whilst the lower cut-off frequency presented in the second example allows for the correct reception of up

to 32 consecutive

“0” or “1”.

3.4.11. Bit Synchronizer

The Bit Synchronizer (BitSync) is a block that provides a clean and synchronized digital output, free of glitches.

Raw demodulator

output

(FSK or OOK)

BitSync Output To

pin DATA and

DCLK in continuous

mode

DATA

DCLK

IRQ_1

Figure 24: BitSync Description

The BitSync can be disabled through the bits RXParam_Bitsync_off, and by holding pin IRQ1 low. However, for

optimum receiver performance, its use when running Continuous mode is strongly advised. With this option a

DCLK signal is present on pin IRQ_1.

The BitSync is automatically activated in Buffered and Packet modes. The bit synchronizer bit-rate is controlled by

MCParam_BR. For a given bit rate, this parameter is determined by:

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