stv8226t STMicroelectronics, stv8226t Datasheet - Page 54
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stv8226t
Manufacturer Part Number
stv8226t
Description
Multistandard Tv Audio Processor And Digital Sound Demodulator
Manufacturer
STMicroelectronics
Datasheet
1.STV8226T.pdf
(97 pages)
- Current page: 54 of 97
- Download datasheet (2Mb)
Register List
54/97
Address (hex): 38h
Type: R/W
Address (hex): 39h
Type: R/W
SQTH2[7:0]
CETH2[7:0]
Bit Name
Bit Name
Bit Name
CRF2[7:0]
Bit 7
Bit 7
CETH2
SQTH2
Bit 6
Bit 6
00000000
00100000
00111100 The squelch detector measures the level of high frequency noise (> 40 kHz) and compares it to
Reset
Reset
Reset
Channel 2 Carrier Recovery Frequency.
Displays the instantaneous frequency offset of the Channel 2 Baseband PLL
This register is used to compare the carrier level in the channel and the threshold value. This
level is measured after the channel filter and is relative to the full scale reference level (0 dB).
This is used as part of the validation of an FM signal, if the carrier level is below the threshold,
the signal is considered to be non-valid.
CETH
FFh
80h
40h
20h
the threshold level (SQTH). If the level is below this value, the S/N of the FM signal is
considered to be acceptable. Values are given for FM with standard deviation.
SQTH
FAh
77h
3Ch
23h
19h
Bit 5
Bit 5
Channel 2 FM Carrier Level Threshold
Channel 2 FM Squelch Threshold
Threshold (dB)
-6
-12
-18
-24 (Default)
S/N (dB)
0
10
15 (Default)
20
25
Bit 4
Bit 4
SQTH2[7:0]
CETH2[7:0]
CETH
10h
08h
00h
Bit 3
Bit 3
Function
Function
Function
Threshold (dB)
-32
-38
OFF (All carrier levels are accepted)
Bit 2
Bit 2
Bit 1
Bit 1
STV82x6
Bit 0
Bit 0
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