A N 5 4 3
242
Rev. 0.9
Property 0x2001 AM_VALID_RSSI_TIME
The AM_VALID_RSSI_TIME property sets the amount of time in milliseconds to allow the RSSI metric to settle
before evaluating. For 4 MHz crystal operation, the minimum recommended settling time for RSSI is 8
milliseconds. The reliability of the valid bit for identifying valid stations relies on this parameter being set properly.
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.
Default: 5
Units: ms
Property 0x2002 AM_VALID_SNR_TIME
The AM_VALID_SNR_TIME property sets the amount of time in milliseconds to allow the RSSI metric to settle
before evaluating. The minimum SNR settling delay is 27 milliseconds. The reliability of the valid bit for identifying
valid stations relies on this parameter being set properly. 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.
Default: 36
Units: ms
Bit
Name
Function
15:8
Reserved
Always write 0.
7:0
AMMAXTUNEERR [7:0]
Sets the maximum freq error allowed in units of 2 ppm before setting the AFC
rail indicator (AFCRL). Default is 75. Range is 0–126.
AM_VALID_RSSI_TIME
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
0x00
RSSIVALTIME[5:0]
0x00
0x05
Bit
Name
Function
15:6
Reserved
Always write to 0.
5:0
RSSIVALTIME[5:0]
Validation time in milliseconds. Default is 5 ms.
Range is 5–63 ms in Si475x-A30 and earlier.
Range is 5–127 ms in si475x-A40 and later.
Note:
The recommended minimum RSSI settling time is 8 ms.
AM_VALID_SNR_TIME
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
0x00
SNRVALTIME [5:0]
0x00
0x24
