EVB71122
300 to 930MHz Receiver
Evaluation Board Description
3.1.5
Control Word R4
Name
R
Bits
[10:0]
000 0100 1011 value is 75
R counter range: 3 to 2047
Description
reference divider range
#default
AGC delay mode
AGCMODE
[11]
0
1
gain decrease and increase with delay
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
RIFF
Bits
[10:0]
010 1001 1011 value is 667
IFF counter range: 4 to 2047
Description
reference divider value for IFF adjustment
#default
MODSEL
[11]
3.1.7
Control Word R6
Name
Bits
IFFPRES
[7:0]
Y
R
A
IN
IM
L
E
R
P
demodulation selection
0
1
FSK demodulation
ASK demodulation
selects modulation type when chip is controlled via SPI mode
#default
Description
IFF preset value
0110 1100
value is 108
#default
IFF DAC preset at start of automatic tuning
IFF halt
IFFHLT
[8]
0
1
auto tuning running
auto tuning halted
suspends IFF automatic tuning
#default
IFF tuning
IFFTUNE
[9]
0
1
00
01
10
11
disable and load DAC with IFFPRES
enable
reference Oscillator core current
ROCUR
[11:10]
85µA
170µA
270µA
355µA
#default
#default
39012 71122 01
Rev. 001
Page 18 of 32
EVB Description
Sept/06
MELEXIS [ Melexis Microelectronic Systems ]
