28

AT86RF211

1942C–WIRE–06/02

Notes:

stopped (previously measured RSSI is kept into STATUS Register). This can disturb the reception process (if a threshold is

used for DATAMSG validation). So, it is not recommended to measure V

3. While in V

4. Description of RSSI measurement with hysteresis mechanism: if the RSSI measurement is higher than the high RSSI level,

DATAMSG is validated (high RSSI level = TRSSI + HRSSI). If the RSSI measure is lower than the low RSSI level, DATA-

MSG is inhibited (low RSSI level = TRSSI - HRSSI). Between these two levels, DATAMSG validation depends on the

previous measurement.

Example:

TRSSI = 32 and HRSSI = 4 implies High RSSI level = 26 and Low RSSI level = 28

–

1

reserved, must be kept to reset value: 0

RXFS

2

RX frequency selection

(00)

(10)

(01)

(11)

reset value: (10)

2

XTALFQ

1

Crystal frequency

0: 10.245 MHz (when IF1 = 10.7 MHz)

1: 20.945 MHz (when IF1 = 21.4 MHz)

resetvalue:0

FSKBW

1

Discriminator range

0: Narrow Discriminator BW

1: Standard Discriminator BW

resetvalue:1

FSKPOL

1

Polarity of DATAMSG

0: inverted signal

1: direct signal

resetvalue:1

DSREF

1

Data Slicer reference voltage

0: external reference: SKFILT pin voltage

1: internal reference: DAC level voltage

resetvalue:1

–

1

reserved, must be kept to reset value: 0

–

1

reserved, must be kept to reset value: 0

MOFFSET

1

0: internal ADC sets to V

1: internal ADC sets to DISCOUT DC level measurement

resetvalue:0

–

1

reserved, must be kept to reset value: 0

MRSSI sequence

27323536

35

3229282725

RSSI level

NOK

NOK

NOK

OK

OK

OK

OK

OK

NOK

NOK

DATAMSG

valid

valid

valid

valid

valid

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