A N 5 4 3
132
Rev. 0.9
Property 0x2205 FM_CHBW_ASSI_MIN_MAX
The FM_CHBW_ASSI_MIN_MAX property sets the maximum and minimum Channel Filter Bandwidth in kHz
based on delta (HASSI,LASSI). To force a given Channel Filter Bandwidth, set the min and max to the same value.
The CTS bit (and optional interrupt) is set when it is safe to send the next command. This property may only be set
or read in powerup mode.
Notes:
1.
The Si4750/51/52/53 do not support dynamic bandwidth control, hence MIN[7:0] = MAX[7:0]. The minimum of MAX[7:0]
of properties 0x2200, 0x2205, and 0x220A determines the
Channel Filter Bandwidth
. Default for Si4750/51/52/53 is
150 kHz.
2.
Delta (HASSI,LASSI) is the absolute difference between HASSI and LASSI. In Si475x-A30 and later, at least one of
HASSI or LASSI must be greater than –15 dB in order for these settings to be observed. Otherwise, the adjacent
channels are considered empty, and the Filter Channel Bandwidth will not be limited based on ASSI.
Si4754/55/56/57 Default: 0x9623
Si4750/51/52/53 Default: 0x9696
Units: kHz
FM_CHBW_ASSI_MIN_MAX
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
MAX[7:0]
MIN[7:0]
0x96
0x23
Bit
Name
Function
15:8
MAX [7:0]
Sets the maximum Channel Filter Bandwidth in kHz.
Si4754/55/56/57 default is 150 kHz.
Si4750/51/52/53 default is 150 kHz.
Range is 1–150 kHz.
7:0
MIN [7:0]
Sets the minimum Channel Filter Bandwidth in kHz.
Si4754/55/56/57 default is 35 kHz.
Si4750/51/52/53 default is 150 kHz.
Range is 1–150 kHz.
