STV82X6 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'STV82X6' PDF : 97 Pages View PDF
Register List
STV82x6
Bit Name
FM1_CAR
FM1_SQ
Reset
Function
0 Channel 1 FM/AM Carrier detector flag
0: Not detected
1: Detected
0 Channel 1 FM Squelch detector flag
0: Not detected
1: Detected
Note: These registers allow direct access to the demodulator signal detectors.
AGCC
Address (hex): 0Eh
Type: R/W
Bit 7
Bit 6
AGC_CMD
0
AGC Control for IF ADC
Bit 5
0
Bit 4
Bit 3
AGC_REF[2:0]
Bit 2
Bit 1
Bit 0
AGC_CST[1:0]
Bit Name
AGC_CMD
Bits[6:5]
AGC_REF[2:0]
AGC_CST[1:0]
Reset
Function
0 Automatic Gain Control Command Mode
Normally set to 0 enabling automatic mode. For L/L’ standards, the AGC should be switched off
due to the presence of the AM sound carrier. In this case, a fixed gain value should be set using
the AGCS register.
0: Automatic mode. AGC controlled by the AUTOSTD function. (Default)
1: Manual/Forced mode
00 Reserved.
100 This bitfield is used to defines the clipping level which adjusts the allowable proportion of samples
at the input of the ADC which will be clipped. The AGC tries to maximize the use of the full scale
range of the ADC. The default setting gives a ratio of 1/256.
Clipping Ratio
Clipping Ratio
000:
1/16 (Single carrier)
001:
1/32
010:
1/64
011:
1/128
100:
1/256 (Default
101:
1/512
110:
1/1024
111:
1/2048 (Multiple carriers)
01 AGC Time Constant
This is the time constant between each step of 1.25 dB by the ADC.
Step Duration (ms)
00
1.33
01
2.66
10
5.33
11
10.66
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