stv8226t STMicroelectronics, stv8226t Datasheet - Page 45

• Manufacturer Part Number: stv8226t
• Description: Multistandard Tv Audio Processor And Digital Sound Demodulator
• Manufacturer: STMicroelectronics

STV82x6
Note:
Address (hex): 0Fh
Type: R
Address (hex): 10h
Type: R
AGC_ERR[4:0]
DC_ERR[7:0]
SIG_UNDER
SIG_OVER
Bit Name
Bit Name
Bit 7
Bit 7
0
Bit 7
AGCS
When AGC_CMD = 0, AGC_ERR[4:0] can be read -- indicating the input level. It can also be written
to -- presetting the AGC level which will then adjust itself to the final value.
When AGC_CMD = 1, the AGC is off and writing to AGC_ERR[4:0] directly controls the AGC
amplifier gain. Reading AGC_ERR just confirms the fixed value.
DCS
Bit 6
Bit 6
Reset
00000000
00000
Reset
0
0
0
Reserved.
Amplifier Gain Control
This is the Gain Control value of ADC. There are 31 steps of +1.25 dB (see Note below).
00000: 0 dB Gain
11110: +37.5 dB Gain
AGC Input SIgnal Upper Threshold
0: Normal signal
1: Signal too large and AGC is overloaded
AGC Input SIgnal Lower Threshold
0: Normal signal
1: Signal too small and AGC is underloaded
When the AGC is in Automatic mode (AGC_CMD = 0), bits SIG_OVER and SIG_UNDER indicate
if the input signal is too small/large and the AGC is under/overloaded. This is useful when setting
the STV82x6 SIF input level.
DC offset error of IF ADC output
Bit 5
Bit 5
AGC Control and Status for IF ADC
DC Offset Status for IF ADC
AGC_ERR[4:0]
Bit 4
Bit 4
DC_ERR[7:0]
Bit 3
Bit 3
Function
Function
Bit 2
Bit 2
SIG_OVER
Bit 1
Bit 1
Register List
SIG_UNDER
Bit 0
Bit 0
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