AN543
Rev. 0.9
183
Property 0x3703 FM_HIBLEND_RSSI_RELEASE_TIME
The FM_HIBLEND_RSSI_RELEASE_TIME property sets the transition time for which the HIBLEND mitigation
engine increases the cutoff frequency based on RSSI. 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.
Si475x-A40 and earlier, Default: 8000
Si475x/5xC-A55, Default: 4000
Units: ms
Property 0x3708 FM_HIBLEND_MULTIPATH_THRESHOLDS
T
he FM_HIBLEND_MULTIPATH_THRESHOLDS property sets the Multipath thresholds for HIBLEND to
begin band limiting and reach maximum band limiting on L–R channel based on max and min cutoff frequencies
(set by Property 0x3709) on the HIBLEND engine. 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.
Si475x-A40 and earlier, Default: 0x193C
Si475x/5xC-A55, Default: 0x080F
FM_HIBLEND_RSSI_RELEASE_TIME
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
RELEASE[15:0]
0x1FA0
Bit
Name
Function
15:0
RELEASE[15:0]
Sets the transition time for which the HIBLEND mitigation engine increases
the cutoff frequency based on RSSI.
Si475x/5xC-A55, Default is 4000 ms. Range is 1–32767 ms.
FM_HIBLEND_MULTIPATH_THRESHOLDS
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
MULTMIN[7:0]
MULTMAX[7:0]
0x08
0x0F
Bit
Name
Function
15:8
MULTMIN[7:0]
Sets the Multipath level at which HICUT reaches max band limiting on the
L–R channel based on cutoff frequency set by property 0x3709.
Si475x/5xC-A55, Default is 8.
Si475x-A10 and earlier, and Si475x-A30 and later: Range is
0
–127 Si475x-
A20: Range:
0
–100
7:0
MULTMAX[7:0]
Sets the Multipath level at which HICUT begins to band limit on the L–R
channel based on cutoff frequency set by property 0x3709.
Si475x/5xC-A55, Default is 15.
Si475x-A10 and earlier, and Si475x-A30 and later: Range is
0
–127 Si475x-
A20: Range:
0
–100
