EVB71122 Datasheet, PDF (18/32 Pages) Melexis Microelectronic Systems – 300 to 930MHz Receiver Evaluation Board Description

EVB71122
300 to 930MHz Receiver
Evaluation Board Description
3.1.5 Control Word R4
Name
R
AGCMODE
Bits
[10:0]
[11]
Description
reference divider range
000 0100 1011 value is 75
#default
R counter range: 3 to 2047
AGC delay mode
0 gain decrease and increase with delay
1 gain decrease without delay, gain increase with delay
#default
selects AGC delay mode in combination with AGCDEL bits, see section 4.1.4 (R3)
3.1.6 Control Word R5
Name
Bits
Description
RIFF
reference divider value for IFF adjustment
[10:0] _{010 1001 1011 value is 667}
#default
IFF counter range: 4 to 2047
PRELIMINARY ^MODSEL
demodulation selection
[11]
0 FSK demodulation
1 ASK demodulation
selects modulation type when chip is controlled via SPI mode
3.1.7 Control Word R6
Name
IFFPRES
Bits
[7:0]
0110 1100
Description
IFF preset value
value is 108
IFF DAC preset at start of automatic tuning
#default
#default
IFFHLT
IFF halt
[8]
0 auto tuning running
1 auto tuning halted
#default
suspends IFF automatic tuning
IFFTUNE
IFF tuning
[9]
0 disable and load DAC with IFFPRES
1 enable
#default
reference Oscillator core current
ROCUR
[11:10]
00 85µA
01 170µA
10 270µA
11 355µA
#default
39012 71122 01
Rev. 001
Page 18 of 32
EVB Description
Sept/06